Instruction/ maintenance manual of the product DOC-7814982 Cisco Systems
Go to page of 648
Corporate He adquarters Cisc o Syst ems , Inc . 170 West Ta sman Drive San Jos e, CA 95 134-1706 USA http://www.ci sco.com Tel: 408 526-4000 800 553- NETS (638 7) Fax: 408 526-4100 Catal yst 2950 Desktop S witc h Sof tware Configuration Guide Cisco IOS Release 12.
THE SPECIFICATIONS AND INFORMATION REG ARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOU T NOTICE. ALL STATEMENT S, INFORMATI ON, AND RECOMMENDA TIONS IN T HIS MANUAL ARE BELIEVED TO BE ACCURATE BU T ARE PRESEN TED WITHOUT WARRANTY OF ANY KIND, EXPRE SS OR IMPLIED.
iii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 CONTENTS Preface xx v Audienc e xxv Pur pose xxv Organi zation xx vi Conv enti ons xxviii Rela te d Publi cation s xxix Obta.
Cont ent s iv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 CHAPTER 2 Using t he Command -Line I nterface 2-1 IOS Command Mode s 2-1 Gettin g Help 2-3 Specif ying P orts in I.
Content s v Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Topolo gy View Po pup Menus 3-22 Link Popu p Me nu 3-22 Device Po pup Menus 3-23 Inter action Mode s 3-25 Guide Mo d.
Cont ent s vi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Example Conf igurat ion 4-8 Manua lly As sign ing IP Infor matio n 4-10 Checki ng and Sav in g the Runn i ng Confi.
Content s vii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Virtua l IP Addr es s es 6-13 Other Consider ations for Clust er Stan dby Grou ps 6-13 Automa tic Recov ery of Clu.
Cont ent s viii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Identi fying t he TACACS+ Server Host and Sett in g the Aut hentica tion Key 7-1 3 Config urin g TACAC S+ Logi n.
Content s ix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Config urin g a Sys tem Name and Prompt 7-48 Defaul t Syste m Name and Prompt Co nfig ura tion 7-48 Config urin g a.
Cont ent s x Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Changin g the Swi tch-to- Client Retran smi ssio n Ti me 8-12 Settin g t he S witch -to -Cli ent Fr ame -Re trans mis sion Num ber 8-13 Enab ling Mul tip le Host s 8-13 Resett ing th e 802 .
Content s xi Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Guidel ines f or Using LRE Profil es 10-7 CPE Ether net Li nk Guidel ines 10-7 Cons ider atio ns f or Co nne cted C.
Cont ent s xii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Spannin g Tree an d Redundan t Connec tivit y 11-8 Acceler ated Aging to R etain Connect ivity 11-9 Config urin g.
Content s xiii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Config urin g a Sec ondar y Root Switc h 12-16 Config urin g the Port Pr iori t y 12-17 Config urin g the Path Co.
Cont ent s xiv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 CHAPTER 14 Configur ing V LANs 14-1 Underst anding VL ANs 14-1 Support ed V LANs 14 -2 VLAN Port Mem ber ship M o.
Content s xv Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Config urin g the VMPS Clie nt 14 -28 Enter ing the IP Ad dres s o f the V MP S 14-28 Config urin g Dynamic Acce ss.
Cont ent s xvi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Defau lt V oic e VLA N Co nfig urat ion 16 -2 Voice VLA N Config urat ion Guidel ines 16-3 Config urin g a Port to Con nect to a Cisco 7960 IP Phone 16-3 Config urin g Ports to Ca rry Voice T raffic in 8 02.
Content s xvii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 CHAPTER 18 Configur ing Port -Ba sed Traf fi c Control 18-1 Config urin g Sto rm Contr ol 18-1 Underst anding St .
Cont ent s xviii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 SPAN Sessi on 21-3 Tra ffic Ty pes 21-3 Source Po rt 21-4 Destin atio n Por t 21-5 Reflec tor Po rt 21 -5 VLAN-.
Content s xix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Setti ng the Message Displ ay Des tinati on Device 23-4 Synchro nizing Log Mes sages 23-6 Enabli ng and Disa blin .
Cont ent s xx Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 ACL Numbers 25-8 Creati ng a Nu mbered Standar d ACL 25-9 Creati ng a Nu mbered Extend ed ACL 25-10 Creati ng Name.
Content s xxi Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Config urin g Trusted Bo undary 26-13 Enab ling P ass-Thr ough Mode 26 -15 Config urin g a QoS Policy 26-16 Classi.
Cont ent s xxii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Replac ing a Fail ed Command Swit ch with a Clus ter Member 28-9 Replac ing a Fail ed Command Swit ch with Anoth.
Content s xxiii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Copyin g Configur atio n Fi les By Usin g FTP B- 13 Prepa ring to Downlo ad or U pload a C onfig urat ion File B.
Cont ent s xxiv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01.
xxv Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Preface Audience The Cataly st 2 950 Desktop Sw itch Sof tware Configuration Gui de is for t he n etwor k ma na ger responsible for conf igur ing the Catalyst 2950 switches, hereaf ter referred to as the switches .
xxvi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Preface Organizati on This guid e does not descr ibe system me ssages you migh t encounte r or how to install your swit ch.
xxvii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Pre face Organization Chapter 8, “ Config uring 802.1X Po rt-Based Au thentication, ” describe s how to configure 802. 1X port-base d authe nticat i on to pr ev ent unau thoriz ed devices (c lients) from ga i ning ac cess to the ne twork.
xxvii i Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Preface Conv ent ions Chapter 25, “ Conf iguring Network Sec urity with A CLs, ” des cri bes h ow to conf igure netw ork securi ty by using acce ss cont rol list s (ACLs).
xxix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Pre face Related Publ icati ons Related Publications These do cuments p rovid e comple te informati on about the switch and ar e av a ilable f rom this Cisco.com site: http://www .
xxx Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Preface Obtain in g Technical Assis ta nce Documenta tion C D-ROM Cisco documentati on and additio nal literature are a v ailable in a Cisco Documentation CD-R OM packag e, w hich is shi pped with you r prod uct.
xxxi Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Pre face Ob taining Technical Assistance Cisco.com Cisco.com is t he foundation of a suite of inter acti ve, network ed ser.
xxxii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Preface Obtain in g Technical Assis ta nce If you are a Ci sco. com registered use r, and you cannot resol ve your tech nica l issu es by using the C isco T AC W eb Site, you can open a ca se online by using the T AC Case Op en tool at t his URL: http://www .
C HAPTER 1-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 1 Overview This chapter pro vides these topics ab out the Catalyst 2950 switch software: • Feat ures , page 1- 1 .
1-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Feature s Th is section descri bes the featu res suppor ted in this rele ase: Note Som e features re quire tha t you have the EI installed on your switch.
1-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Features • Switch clus teri n g te chnol ogy u sed with CM S for – Unif ied conf iguration, mo nitoring, authen tication, and softw are upgrade of multip le switches (refer to the r elease notes for a li st of eli gible clust er membe rs).
1-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Feature s • Address Resolution Protocol (ARP) for identif ying a switch through its IP address and.
1-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Features – Loop gu ar d for pr ev enting alterna te or roo t ports fr om bec om ing d esignate d port s be cause of a failur e that l eads to a unidirect ional li nk Note The switch support s up to 64 spanni ng-tre e insta nces.
1-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Feature s Quality of Service and Class of Service • Classif ication – IEEE 8 02.
1-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Manageme nt Options Management Options The swi t ch es are des igned for plug-an d-play o peratio n: you on ly need to assign basic IP infor ma tion to the switc h and c on nect i t to t he ot her devices in you r net work.
1-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples By using switch cl usters a nd CM S, yo u c an: • Manage and mo.
1-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Bandwidt h alone is not the only c onsiderat ion when d esigning you r network.
1-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Y o u can cr eate bac kup paths by using Fast Ethern et, Gigab it, Fast Eth erChanne l, or Gigab it EtherCha nnel li nks.
1-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Figur e 1 -1 Example Configur ations Small to Medium-Sized Network Configuration Figure 1-2 sh ows a con figurat ion for a n etwork th at has u p t o 25 0 u ser s.
1-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples A network backbone i s a high-ba ndwidth co nnectio n (such as Fast Ethe rnet or G igabit Ethe rnet) tha t interc onnects segm ents and netw ork resour ces.
1-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Collaps ed Backbo ne an d Switch Clu ster Configuratio n Figure 1-3 sh ows a con figura tion for a n etwor k of appro xi mat ely 50 0 em pl oyees.
1-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Figur e 1 -3 Collapsed Back bone and Switc h Clust er Conf iguration Large C ampus C onfiguration Figure 1-4 shows a c on f i gur atio n fo r a n etw ork of m ore th an 1 0 00 users.
1-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Figur e 1 -4 Larg e Campus Confi gura tion Catalyst 6500 s witch Cisco ac.
1-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Hotel Network Configuration Figure 1-5 sh ows the Cataly st 2950 LRE switches in a hotel netw ork en vironmen t with approximatel y 200 room s.
1-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Y ou can mana ge the swit ch es as a s witch clu s ter an d th r oug h th e clu s te r ma na geme nt suite (C MS).
1-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Multidwelling Network Usi ng Catalyst 2950 Switches A growing segmen t of residen tial a nd co mmer cial cu stome rs ar e requir ing h igh-spe ed acc ess t o Ether net metropolita n-area networks (MANs).
1-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Network Configuration Examples Figur e 1 -6 Catalyst 2950 Swi tches in a MAN Con figur ation 50833 Ser v.
1-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Long-Distan ce, High-Ba ndwidth T ransport C onfiguration Note T o use the feature de scribed in this sectio n, you must hav e the EI installe d on your Cataly st 2950 switch.
1-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 1 Overview Where t o Go Next Where to Go Next Before conf iguring the switch, re view th ese section s for start up.
1-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Ch ap ter 1 Ov er vi ew Where to Go Nex t.
C HAPTER 2-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 2 Using the Command-Line Interface This c ha pter d escri bes th e IO S comm an d-l ine int erfa ce ( CLI ) th at you c a n u se to con figure your switch es.
2-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce IOS Command Modes Ta b l e 2 - 1 desc ribes the main co mman d modes, how to acc ess each one , the prom pt you see in that mo de, and ho w to e xit the mo de.
2-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 Using the Comm a nd-Line In terface Getting Help Getting Help Y ou can enter a qu es t i on ma rk (? ) at th e s y s tem pr om p t to d is p lay a lis t of co mm an d s a v ailab l e f or eac h comma nd mode .
2-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Spec ifyi ng Po rts in I nte rfa ce Co nfig urat ion Mo de Specifying .
2-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 Using the Comm a nd-Line In terface Abbrev iating Com mands • Port number — T he n umber of the physic al por t on the sw itch . Refe r to y our swi tch for th e por t numb ers .
2-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Usin g C omm a nd His tor y Using Command History The IOS provid es a history or re cord of com mands tha t you have entered.
2-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 Using the Comm a nd-Line In terface Using Edit ing Featu res Disabling th e Com mand His tor y F eatu re The comma nd history feature is automatic ally enab led.
2-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using E diting Feature s Editing C ommands throu gh Keystrok es Ta b l e 2 - 5 shows th e ke ystrok es that you need to edit co mmand lines .
2-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 Using the Comm a nd-Line In terface Using Edit ing Featu res Editing C ommand Lines that Wrap Y o u can use a wrap around feature for commands t hat extend beyond a singl e line on th e screen .
2-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Searching and F iltering O utput of show and more Com man ds Use lin e wrapping with the co mman d history fe ature to recall and modif y previous complex co mmand entries.
2-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 Using the Comm a nd-Line In terface Acce ssi ng th e C L I fro m a B rows er Accessing the CLI from a Bro wser Th.
2-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Access ing th e CLI from a Br owse r.
C HAPTER 3-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 3 Getting Started with CMS This chapte r provides these topics about the Cluste r Management Suite (CMS ) software:.
3-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Feature s Features CMS pro vides these featu res (see Figure 3-1 ) for m anagi ng switc h.
3-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Features • T wo lev els of access to the conf iguration optio ns: read-wr ite access for users allo wed to change switch se ttings; read- only acce ss for users allo wed to on ly vie w switch settings.
3-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Front Panel Vi ew Front Panel View When CMS is laun ched from a comma nd switch, the Fron.
3-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Front Pa nel Vie w Figur e 3-3 F r ont P anel View fr om a 2950 Com mand Sw itch When CM.
3-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Front Panel Vi ew Figur e 3-5 F r ont P anel View fr om a 2950 no n-LRE Standalone S witc.
3-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Front Pa nel Vie w Front-Panel Images Y o u can mana ge the swit ch from a remot e stati on by using the front- panel ima ges.
3-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Front Panel Vi ew Redundant Power System LE D The Redundant Po wer System ( RPS) LED sho ws t he RPS stat us (see Ta b l e 3 - 3 ).
3-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Front Pa nel Vie w T o sele ct or ch an ge a m ode, c lick t he M ode button un til the desi re d mo de L ED i s gree n.
3-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Topology Vie w Topology Vie w The T opology vie w displays ho w the de vices within a switch cluster are con nected and ho w the switch cluster i s con ne cte d to oth er cl usters and devices .
3-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Topol ogy View Figur e 3-8 Expan d Cluste r View Figur e 3-9 Collaps e Clust er View Right-click a link icon to displa y a link popup menu.
3-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Topology Vie w Topology Icons The T op ology view and the cl ust e r tree us e the sam e set of device icons to r epresen t cluster s, com mand and standby c omm and sw it ches, a nd m embe r swit che s (see Figur e 3-10 ).
3-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Topol ogy View Figur e 3-1 1 T opolog y -V iew Lin k Icons Device and Link Lab els The .
3-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Topology Vie w Colors in the Topo logy Vie w The col ors of the T o pology vi e w ic ons show the st atus of t he d evices and li nks (see Ta b l e 3 - 7 , Ta b l e 3 - 8 , and Ta b l e 3 - 9 ).
3-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Menus and To olbar Topology Display Optio ns Y o u can set th e type of info rmati on displaye d in the T opology view b y changing the settings i n the T opology O ptio ns wi ndow .
3-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Menu s an d Toolba r Note • W e stron gly recomm end that the hig hest- end, comm and-.
3-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Menus and To olbar T able 3-1 1 Menu Bar Menu-B ar O ptio ns T ask CMS Page Setup Set default doc um ent pr int er p rop ertie s t o be use d whe n prin tin g from CM S.
3-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Menu s an d Toolba r STP 2 Display and conf igure STP para meters for a switch. IGMP Sn oopin g 2 E nable and di sable In ternet Group Manage ment Protoc ol (IGMP) snoo ping an d IGMP Immediate-Lea ve proc essing on the switch.
3-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Menus and To olbar V oice VL AN 2 Configu re a port to use a v oice VLAN f or voice traf fic, separating it fr om the VLANs for data traf f ic.
3-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Menu s an d Toolba r Toolbar The toolba r buttons display com monly- used switch and cluster configurat ion options and i nformat ion windo ws such as l eg ends an d onlin e he lp.
3-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Menus and To olbar Front Panel V iew Po pup M enus These popu p menus ar e available in the Front Panel view .
3-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Menu s an d Toolba r Topology View P opup Men us These popu p menus ar e available in the T o pology vi ew .
3-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Menus and To olbar Figur e 3-12 Multilin k Decomposer Window Device Popup Menus Specifi.
3-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Menu s an d Toolba r T able 3-1 7 Device P opup M enu of a Comm and-S witc h Icon Popup M enu Opt ion T ask Coll apse clu ster V ie w the neighbo rhood outsi de a specific clu ster .
3-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Inter action Mo des Interaction Modes Y o u can ch an ge the inte ra ctio n m ode of CMS t o eit her gu ide or expert m ode . G uide m od e st ep s you through each fea ture optio n and provides i nformat ion about the parame ter .
3-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Wizards Wizards Note Wiz ards are not a v ailable if your switch access le v el is read-only . For more informa tion about the read- only acc ess mode, s ee the “ Ac cess Modes in CMS ” sect ion o n page 3-31 .
3-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Online Help Figur e 3-13 Help Con ten ts and In dex Figur e 3-14 Help Con ten ts and In dex Inf or mation about the CMS interf ace. F eature help , such as concepts.
3-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS CMS W indow Com ponent s CMS Window Components CMS windo ws consistently present conf iguration info rmation. Figure 3-15 shows the components of a typical CMS window .
3-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS CMS Wi nd ow Co mpo n ents Tabs, Lists, and T ables Some CMS windows ha ve tabs that presen t diff erent sets of info rmation. T abs are arranged like fold er headings acr oss the top of the windo w .
3-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Access ing CMS Buttons These a re the m ost common butto ns that you use to change the info rmation in a CMS win dow: • OK — Sa v e an y chan ge s and clos e th e wi ndo w .
3-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Acce s sing CMS T o acces s CMS, follo w these st eps: Step 1 Enter the switc h IP address and your pri vile ge le v el in the browser Location fie ld (Netsc ape Commu nicator ) or Address field (M icrosof t Internet Explore r).
3-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Verifying Yo ur Cha nges • These switc hes do n ot su ppo rt r ead- only mo de on CMS:.
3-33 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Star ted with CMS Saving Your Configuration Saving Your Co nfigurat ion Note Th e Save Configurati on option is not a vailable if you r switch acce ss lev el is read-onl y .
3-34 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 3 Getting Started with CMS Using Differen t Versions of CMS Using Different Versions of CMS When managi ng switch c.
C HAPTER 4-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 4 Assigning the Switch IP Address and Default Gateway This chapt er describes ho w to create the initial switch conf iguration (for e xample, assig n the switch IP address an d default gateway informa tion) by using a variety of au tomati c and manua l methods.
4-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n The boot loader a lso provid es trap-door access in to the system if the o perating system has problems serious enoug h that i t cannot be use d.
4-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Default Switch Information Ta b l e 4 - 1 shows the default switch information.
4-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n DHCP Client Request Proce .
4-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Configuring the DHCP Ser ver Y o u shoul d configure t he DHC P server wi th rese rved leases t hat ar e boun d to each switch by th e switc h hardware address.
4-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n For the switch to successf ull y do wnl oad a conf igu ratio n f i le, the TFTP ser v er must contain one o r more configur ation files in its base direct ory .
4-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Figur e 4-2 Rela y Devic e.
4-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n Note The switch br oadcast.
4-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information DNS Ser ver Conf iguration The DNS server ma ps the TF TP server name ma ri ts u to IP address 10.
4-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Checking and Saving th e Run ning Confi gura tion Manually.
4-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Checki n g an d Sav in g the Ru nnin g Co nfig ur atio n ! hostname Switch ! enable secret 5 $1$ej9.
4-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Checking and Saving th e Run ning Confi gura tion no ip address shutdown ! interface Vlan1 ip address 172.20.
C HAPTER 5-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 5 Configuring IE2100 CNS Ag ents This chap ter describes h ow to c onfigure th e Intelligence Engine 2100 (IE2100) Series Cisco Netw orking Servic es (CNS) embe dded ag ent s on you r switc h.
5-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Unders tan ding IE21 0 0 Series Config uration Reg istrar Softwar e Figur e 5-1 Co.
5-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Understan ding IE2100 Series Configurat ion Registrar S oftware CNS E ven t Serv i ce The Conf iguration Regi strar uses the CNS Ev ent Servic e for rece ipt and ge neration of conf iguration e ven ts.
5-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Unders tan ding IE21 0 0 Series Config uration Reg istrar Softwar e DeviceID Each .
5-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Unde rstan ding CNS Embe dde d Ag ent s Understandin g CNS Embedde d Agents The CNS e v ent ag ent feature allo ws the swit ch to publish and su bscribe to e vents on the e v ent b us and works with the CNS configurati on agent.
5-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Configur ing CNS Em b edded A gen ts Incremental (Partial) Configur ation After t he ne twork is r unn ing, new serv ice s ca n b e ad de d by using t he CN S c onfigura tion ag en t.
5-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts Note For more informatio n about running the s.
5-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Configur ing CNS Em b edded A gen ts Enabling th e CNS Ev ent Agent Note Y ou must e nable t he CNS ev ent agent on the s witch b efore y ou enab le the CNS conf igurat ion ag ent.
5-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts T o disable the CNS e v ent agent, use the no cns event { ip-address | hostname } glob al configur ation comm and.
5-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Configur ing CNS Em b edded A gen ts Step 3 config-cli or line -c li Enter config -cli to connect to the Config uration Registrar through t he interface de fined in cns c onfig connect-i ntf .
5-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts T o disa ble t he CNS conf igurati on age nt, use t he no cns conf ig initia l { ip-add r ess | hostname } global configurati on comm a nd.
5-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Configur ing CNS Em b edded A gen ts Enabling a Partial Configur ation Beginn ing.
5-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configuring IE21 00 CNS Agents Displaying CNS Configuration Displaying CNS Confi guration Y o u can use the privileged EXEC comma nds in Ta b l e 5 - 2 to display CN S Configuration inform ation .
5-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 5 Configur ing IE2100 C NS Agents Displaying CNS Con figuration.
C HAPTER 6-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 6 Clustering Switches This chapte r provides these topics to help you get started with switch clu stering: • Unde.
6-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Unders tan din g Sw itch Cluste rs Understandin g Switch Clust ers A switch cluster i s a group of connected C atalyst swit ches that a re manage d as a sing le entity .
6-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Underst anding Swi tch Clust ers Command Switch Character istics A Cataly st 2950 co mm an d swit ch m ust me et t hese r equi reme nts: • It is running Release 12.
6-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Unders tan din g Sw itch Cluste rs Note Ca talyst 2950 com mand sw itches r unning R eleas e 12. 1(9)EA1 or la ter can conn ect to s tandby com mand swit ches in the ma nage ment VLAN.
6-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Note Catalyst 2950 stand by command switche s runni ng Releas e 12. 1(9)EA1 or later can co nnect to candidat e and membe r switche s in VLANs di f fer ent from their mana gement VL ANs.
6-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Discovery through CDP Hops By using CDP , a comma nd switch can di scover switches up to se ven CDP hops away (the default is three hops) from the ed ge of the clus ter .
6-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Figur e 6-2 Disco very thr ough CDP Hops (Co mmand S witch Running Releas e 12.
6-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Discovery through the Same Management VLAN A Catalyst 2900 XL command switch, a Ca talyst 2950 comma nd switch ru nning a rele ase earl ier than Release 12 .
6-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Discovery through Different M anagement VLANs W e reco mmend us ing a Catalyst 3550 com mand switc h or a Catalyst 2950 comm and swi tch runni ng Releas e 12.
6-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Figur e 6-6 Disco very thr ough Dif f er ent Ma nagem ent VLANs.
6-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Figur e 6-7 Disco v ery of Newly I nstalled S witc hes in the S.
6-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er HSRP and S tandby Command Sw itches The switc h supp orts H ot Sta ndby Rout er Protoc ol (HSRP) so that you ca n co nfigure a group of standby comman d s wit che s.
6-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Virtual IP Addresses Y o u need to assig n a uniqu e virt ual IP add ress and gr oup num ber a nd name to t he clu ster sta ndby group.
6-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er • All stan dby-group memb ers must be me mber s of the clust er . Note The re is no lim it to the number of sw itches that you can assi gn as standb y command switches.
6-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Automatic Recover y of Cluster Configuration The act iv e comm and switc h contin ually forwa rds clust er-configurati on informa tion (but not device-configurat ion info rmation) to the standby comma nd switch.
6-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Host Names Y o u do not need to assig n a host name to either a c omman d switch or an eligibl e clust er membe r .
6-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er TACACS+ an d RADIUS Inconsistent authenti cation configur ations in switch clusters cause CMS to continually pr ompt for a user name and pa ssword.
6-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Manageme nt VLAN Communication wi th the sw itch manag ement int erfaces i s through the comma nd-switch IP address.
6-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster Availability of Switch-Specifi c Features in Switch Clusters The me nu bar on t he co m mand switch d isplays al l optio ns av ailab le f rom the switch c l uster .
6-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Creating a Switch Cluster If you did not enab le a command switch durin g initial switch setup, launch De vice Manager from a command-cap able switch, a nd select Cluster > Cr eate Cluster .
6-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster If a cand idat e s witc h in th e gr oup has a password di fferent from t he gr oup, on ly that speci fic candi dat e switch is no t adde d to t h e cl us ter .
6-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Creating a Switch Cluster Figur e 6-12 Using the T opolog y V iew t o A dd Member Switc hes C.
6-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster These a bbreviations are ap pended t o the switc h host nam es i.
6-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Creating a Switch Cluster Verifying a Switch Cluster When yo u fini sh adding cl uster me mbe.
6-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switche s Using the CLI to Manage Switch Clusters Using the CLI to Manage Swit ch Clusters Y o u can co nfigure memb er switch es from the CLI by f irst logg ing into the co mmand switch .
6-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 6 Clustering Switches Using SNMP to Ma nage Sw itch Cl usters Using SNMP to Manage Switc h Clusters When you first power on the sw itch, SN MP is en abled i f you e nter the IP infor matio n by using the setup program a nd a ccep t i ts p rop ose d con figurat ion.
C HAPTER 7-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 7 Administering the Switch This cha pter descri bes how to perform one-t ime ope rations to administ er your switc h.
7-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds • For an add iti o n al la ye r of se cu rity , you can al so co nfigur e user name a nd password p airs, w h i ch are locally stored on the switch.
7-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Setting o r Changin g a Static Enab le Pa ssword The en able password control s access to the privileged EXEC mode.
7-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds Protecting En able and E nable Secre t .
7-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds If bo th the en able and e nable sec ret pas sword s are de f ined, us ers must enter th e enable s ecret p asswo rd.
7-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds Beginning i n privileged E X EC mo de ,.
7-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds T o remo v e the passwo rd, use the no password global co nfigurati on comm and.
7-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds T o disable us ernam e authe nticat ion for a specif ic u ser , use the no username na me global conf igurati on comman d.
7-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds When y ou set a command to a pr i vile ge le ve l, all command s whose syntax is a subs et of th at com mand are al so set to th at le v el.
7-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ Logging into and Exiting a Privilege Level Be.
7-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ Figur e 7 -1 T ypical T ACACS+ N etwo r k Confi.
7-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ TACACS+ Ope ration When a use r attempts a sim ple ASCII login by authent icating to a switch using T A CA CS+, this proc ess occurs: 1.
7-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ This se ctio n c onta ins thi s configu ratio n.
7-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ T o remov e the specif ie d T A CA CS+ s erv er name or addr ess, use the no tac acs- server ho st hostnam e global configurat ion comm and.
7-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ Beginning i n privileged E XEC mo de, foll ow these s teps to c on figure lo gi n au th entic a tion : Comma nd Pu rpos e Step 1 conf igure t erminal Enter globa l configurati on mode.
7-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ T o disa ble A AA, us e the no aaa new-model glo bal co nfigur atio n c omm and.
7-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ Starting TACACS+ Accounting The AA A accou nting featu re trac ks the servic es tha t users are a ccess ing an d the amoun t of ne twor k resources th at the y are co nsuming.
7-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Controlling Switch Access with RADIUS This s.
7-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS RADIUS is not suitable in these netw ork security situations: • Multipr otocol acce ss en v ironmen ts.
7-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Configuring RADIUS This se ctio n de scri bes how to c onfigure yo ur sw itch to su ppo rt R ADI US.
7-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Y o u iden tif y R ADI US secu ri ty s er vers by the ir host na me or I P ad dre ss, host name a nd spe c ific UDP port num bers, or t heir I P addre ss and spec ific UDP port numb ers.
7-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS T o remo ve the specif ied RADIUS serv er , u se the no radius-serv er host hostname | ip- address global configurati on comm a nd.
7-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS This examp le shows how to configure ho st1 as t.
7-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Comma nd Pu rpos e Step 1 conf igure t erminal Enter globa l configurati on mode. Step 2 aaa new-model Enable AAA.
7-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS T o disa ble A AA, us e the no aaa new-model glo bal co nfigur atio n c omm and.
7-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Beginning i n privileged E XEC mo de, fol lo.
7-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS T o remo ve the specif ied RADIUS serv er , u se the no radius-serv er host hostname | ip- address global configurati on comm and.
7-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Beginn ing in pri vile ged EXEC mo de, follo.
7-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Configuring Settings for All RADIUS S ervers Beg.
7-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS For e x am ple , th e f oll o wing A V p air.
7-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Beginning i n privileged EXEC mode, f ollow thes.
7-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Configur ing the Switc h fo r Local Au thentica tion and A uthorizat ion Configuring th.
7-33 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Configuring the Switch for Secure Shell Configuring the Switch for Se cure Sh ell This sec tion descri bes ho w to conf igure th e Secure Shell (SSH) feature .
7-34 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Managing the System Time and Date Y o u can ma nage.
7-35 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e NTP uses the concept o f a str atum to desc ribe h ow many NT P hops away a d evice is fro m an author itative time sourc e.
7-36 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Figur e 7 -3 T ypical NTP Netw or k Config ura tion.
7-37 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Default NTP Configurati on Ta b l e 7 - 2 shows the d efault NTP co nfiguration . NTP is enable d on all interfa ces b y default.
7-38 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date T o dis ab le N TP au then tic atio n, use the no ntp authenticate global configurat ion comm and.
7-39 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Y o u need to co nfigure only one end of an assoc iation; the other de vice can a utomat icall y establi sh the associat ion.
7-40 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date T o disable the interface from s ending NTP broadcast pack ets, use the no ntp broadcast interface conf igurat ion command.
7-41 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Creating an Access Gro up and Assigni ng a .
7-42 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date If the source IP address m atches the access lists fo r more t han one acces s type, the f irst typ e is grant ed.
7-43 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Beginn ing in pri vile ged EXEC mode, follo.
7-44 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Setting the System Clock If you have an outsid e source on the net work that pr ovides time ser vices, su ch as a n NTP server , you do not need to manuall y set the syste m clock.
7-45 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Configuring the Tim e Zone Beginn ing in pr.
7-46 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Configuring Summer Time (Daylight Saving Ti me) Beg.
7-47 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Beginning in privileged EX EC mode, fol low.
7-48 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Configur ing a Sys tem Nam e and Prompt Configuring a System Name a nd Prompt Y o u configure the system name on the switc h to identi fy it.
7-49 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Confi guring a S ystem Name an d Prompt Configuring a System P rompt Beginning i n pri.
7-50 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Configur ing a Sys tem Nam e and Prompt Default DNS Configur ation Ta b l e 7 - 3 shows the d efault DNS configura tion .
7-51 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Creat ing a Bann er domain name is the v alue set by the ip d oma in -n ame glo bal c onfigurati on c om mand.
7-52 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Creating a Banner Configurin g a Mess age-of-the -Day Log in Bann er Y ou can create a sing le or mult iline messa ge b anner tha t a ppea rs on th e scr een wh en so m eone lo g s in to the switch.
7-53 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Creat ing a Bann er Configurin g a Login B anner Y o u c an co nfigur e a l og in ba nner t o be di spla yed on al l c onnec ted t ermin al s.
7-54 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table Managing the MAC Ad dress Tabl e The MA C address table cont ains add ress inf ormation that th e switc h uses to fo rwar d traf fic betwe en ports.
7-55 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table MAC Addr esses an d VLANs All addr esses are as sociate d with a VLAN. An add ress can e xist in more than one VLA N and ha ve different de stinati ons in each.
7-56 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table T o retur n to the default v alue, use the no mac address-table agi ng-time global configurati on comma nd.
7-57 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table Beginning i n privileged E X EC mo de , follow these .
7-58 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table T o disable the switch fr om sending MA C address notification tra ps, use the no snmp-serv er enable traps mac-notification global con f igura tion co mman d.
7-59 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table Beginning i n privileged EX EC mo de , follo w these .
7-60 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table Beginning i n privileged EX EC mo de , follow these s.
7-61 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adminis ter ing the Switch Managi ng the ARP Ta ble Managing the ARP Ta ble T o commun icate w ith a de vice (o v er Eth ernet, for e xam ple), the softw are f irst m ust dete rmine the 48-bi t MA C or the local data link addre ss of that device.
7-62 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 7 Adm inistering the Switch Switch Softw are Release s.
C HAPTER 8-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 8 Configuring 802.1X Port-Ba sed Authen tication This cha pter describ es how to configure IEEE 802 .1X port-ba sed au thentic ation to pr e vent unautho rized devices (clie nt s) f rom ga ining ac cess to the network.
8-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Unders tan ding 802.1X Port -Based A ut henticat io n Device Roles W it h 802.1X po rt-ba sed authentic ation, the de vices in the netw ork ha ve specif ic role s as sho wn in Figure 8-1 .
8-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Understandi ng 802.1X P ort-Based Aut henticat ion Authentication Initiation and Message Exchange The swi tch or th e client can initi ate authen tication.
8-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Unders tan ding 802.1X Port -Based A ut henticat io n Ports in Au thorized and Un authorized S tates The switc h port state determi nes whet her or not the client is gran ted acces s to the net work.
8-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Configur ing 80 2. 1X Au thent ica tion Default 802.1X Configuration Ta b l e 8 - 1 shows the d efault 802.1 X configurat ion .
8-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication 802.1X Configuration Guidelines These ar e the 80 2.1X authenti cation co nfigurati on guid elines : • When 802.
8-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Configur ing 80 2. 1X Au thent ica tion Enabling 802.1X Authentication T o enable 802 .1X port-based auth entication , you must enable AAA and specify the au thenticatio n method list.
8-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Configur ing 80 2. 1X Au thent ica tion This exam ple sh ows how to specify the server w it h IP add re ss 172. 20.
8-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Configur ing 80 2. 1X Au thent ica tion Changing the Sw itch-to-Clie nt Retran smission Time The client respon ds to the EAP-request/id entity frame fro m the switch with an EAP-response/i dentity frame.
8-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticat ion Display ing 802.1 X Stat is t ics and Status T o disabl e multip le hosts on the po rt, use the no do t1x mu ltipl e-ho sts interface conf iguration c ommand.
C HAPTER 9-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 9 Configuring the Switch Interfaces This c ha pter d efines the ty pes o f i nte rface s on th e swi tch and de scri bes how to c on figure th em .
9-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Unders tan ding Inte rfa ce Type s These sectio ns describes these type s of int.
9-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Unde rsta ndi n g In t erf ac e Ty p es Port-Based VLANs A VLAN is a switched netwo rk that is logically segmented b y function, team, or application, witho ut reg ard to the physic al location of the user s.
9-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd Figur e 9-1 Connecting VLANs with La y er 2 S wit.
9-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Using the Interface Command Enter configuration commands, one per line. End with CNTL/Z. Switch(config)# Step 2 Enter t he interface globa l c onfigurati on co mma nd.
9-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd Queueing strategy: fifo Output queue 0/40, 0 drop.
9-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Using the Interface Command – gigab iteth ernet slo t/{ fi rs t p o r t } .
9-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd Configur ing an d Using Inter f ace- Ra nge Ma cros Y ou can crea te an in terface -rang e macro to autom atically select a range o f inter faces for co nfig uration .
9-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Switch Interfaces This exampl e shows ho w to define an interfac.
9-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Conf igu rin g Sw itch Int erf aces Default Ethernet Interface Configuration Ta b l e 9 - 1 shows th e E th erne t inter f ace d efa ul t c onf igura tion.
9-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Switch Interfaces become acti v e.
9-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Conf igu rin g Sw itch Int erf aces Note Y ou c annot co nfigure spee d or dupl.
9-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Switch Interfaces Setting the Interface Speed and Duplex Pa ram.
9-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Conf igu rin g Sw itch Int erf aces service timestamps log uptime no service pa.
9-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Switch Interfaces These ru les appl y to flo w co ntrol settin .
9-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Monito rin g and Mai nt aining th e In terfaces Adding a De scription fo r an In terface Y ou can add a descrip tion about an inte rface to help you remember its func tion.
9-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Monitoring and Maintaining the Interfaces This exam ple sh ows how to displ.
9-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Monito rin g and Mai nt aining th e In terfaces Operational Mode: down <outp.
9-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring th e Sw itch Interf ace s Monitoring and Maintaining the Interfaces Clearing and Resetting Interfaces and Counters Ta b l e 9 - 3 lists the clear p ri vile ged EXEC co mmands that you can use to clear coun ters and r eset interf aces.
9-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 9 Configuring the Switch Interfaces Monito rin g and Mai nt aining th e In terfaces Use the no shutdown inter face co nf iguration command to restart th e interf ace.
C HAPTER 10-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 10 Configuring LRE This chap ter de scri bes ho w to con fig ure the Lo ng-Re ach Ether net (LRE) featur es on you r switch.
10-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE LRE Link s and LRE Profiles LRE Links and LRE Profiles The LR E link s ettings d efine the conn ection be twee n the swi tch LRE port and the CPE RJ-11 wall port .
10-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE LRE Links and LRE Profiles Y our data rates will al ways b e le ss than the g ross d ata rate li sted in table .
10-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE LRE Link s and LRE Profiles • Use the LL prof iles (LRE-5LL, L RE-10LL, an d LRE-15LL ) with car e. These prof iles ha ve the low-latency (LL) fe ature enable d and the in terleaver featur e disa bled.
10-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Configuring LRE Ports Beginn ing with the f irst prof ile in a sequence, the switc h attempts to apply each pro file within that sequence to the L RE interf ace.
10-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Conf igu rin g LR E Por ts Environmental Guidelines for LRE Links The guid eline s for your LR .
10-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Configuring LRE Ports The g reate st imp act on LR E pe rf orm ance is from t he fr eq ue ncy respon se of th e c ab le at th e hi gher freque ncies.
10-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Conf igu rin g LR E Por ts Note Whe n the defau lt speed is set to 10 or 100 Mbps with half dupl ex, the va lues set are the same.
10-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Configuring LRE Ports Use the sho w contro llers lr e privileged EXEC co mmand s to displa y the LR E link st a tistic s an d profile informatio n on the LRE ports.
10-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Conf igu rin g LR E Por ts Assigning a Sequence to a Specific LRE Port Y o u can set seq uenc es on a per-port basis. Y ou can assign the same sequen ce or different se quence s to the LRE ports on the switch.
10-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Configuring LRE Ports In any of these cases, rate selection obta ins the optimal prof ile for your line condit ions.
10-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Conf igu rin g LR E Por ts Link Qualification and SN R Margins When rate se lection is ru nning, th e SNR is used as an ind icator of li nk quality .
10-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Configuring LRE Ports The margin ra nge for link qu alificatio n is from 1 to 10 dB. The re comme nded value in a low-noise en vi ronme nt is 2 dB .
10-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Conf igu rin g LR E Por ts Note Th e margin co mm an d is effective with any profile, but only in conj unct ion w ith rate select ion an d only when a link is being acti vated.
10-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Upgrading LRE Switch Firmware • Link Fail Counts : Th e number of times the link f ailed. A link f ail interru pts operation of the Ethernet link for a small nu mber of milli seconds.
10-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Upgradi ng L RE Switch F ir m w are If you wish to ov erride the switch ’ s automatic select.
10-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Upgrading LRE Switch Firmware Global Configuration of LRE Upgrades Beginning in pr ivileged EXE.
10-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Upgradi ng L RE Switch F ir m w are LRE Upgrad e Behavior De tails Y o u see on th e console screen wh en you star t an upgr ade: Switch> en Switch# hw-module slot 0 upgrade lre You are about to start an LRE upgrade on all LRE interfaces.
10-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configuring LRE Upgrading LRE Switch Firmware The CPE device has finished resetti ng.
10-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 10 Configur ing LRE Upgradi ng L RE Switch F ir m w are.
C HAPTER 11-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 11 Configuring STP This chapt er describ es ho w to configure the Span ning Tree Protocol (STP) on you r switch.
11-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures • Spanning Tree and Redun da nt Co nnec tivity , pag.
11-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res • Message age • The iden tif ier of the sending inte.
11-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures BPDUs conta in informa tion about the sending switch and i ts ports, inclu ding switch a nd MA C addresses, swit ch pri ority , port prior ity , and path co st.
11-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res Creating the S pannin g-Tree To pology In Figure 11 -1 ,.
11-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures An interfac e mov es through these state s: • From i.
11-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res Blocking State A Layer 2 in ter f ace in th e b lo ckin g state does not p ar tic ipate in frame f o rw a rdin g.
11-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures Disabled State A Laye r 2 int erface in th e disab led state do es not parti cipa te in frame forwar ding or in the span ning tree.
11-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res Figur e 1 1 - 3 Spanning T r ee and Redun dan t Connectivity Y o u can also c reate red undan t links betwe en switches by using EtherCha nnel gro ups.
11-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s • Conf iguring the Hello T ime, page 11-19 • Conf i.
11-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res Cautio n Switches that are not running spanning tree still for ward BPDUs that the y recei v e so that the other switche s on the V LA N that have a run ning span ning -tree in stance can b reak l oops.
11-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Disabling STP STP is e nabl ed by d efau lt on V LAN 1 a nd on al l newly cre ated V LAN s u p to the sp anni ng- tree lim it specif ied in T able 11- 3 .
11-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res These e xamp les sho w the ef fect of th e spanning-tree.
11-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Be gin n in g i n p r i vil e g ed E XEC m ode, follo w.
11-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res Beginn ing in pri vile ged EXEC mo de, follo w these ste.
11-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Note Th e show spanning-tree int erface interface- id privileged EXEC command displa ys informat ion only if th e por t is i n a l ink -up op er ative state .
11-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res Note Th e show spanning-tree int erface interface- id privileged EXEC command displa ys informat ion only for por ts that ar e in a link- up opera ti ve s tate.
11-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Configuring the Switch Priority of a VLAN Y ou can config ure the switch prior ity and make it more lik ely that the switc h will be chosen as t he root switch.
11-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Confi guring S panni ng-Tree Featu res Configuring the Hello Time Y ou can config ure the interv al b etween the genera tion of conf iguratio n messages by the root switch b y chan ging the hello tim e.
11-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s T o retur n the switc h to its def ault settin g, use the no spanning-tr ee vlan vlan -id for w a r d - t i m e global configurati on comm a nd.
11-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Display ing the S panning -Tree St atus Figur e 1 1 -4 Gigabit Ether ne t Stac k Displaying the.
11-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 11 Configuring STP Displaying the Spannin g-Tree Stat us.
C HAPTER 12-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 12 Configuring RSTP and MST P This ch apter descr ibes how to co nfigure the C isco im plement ation of the IE EE 80 2.1W Ra pid Spa nning T ree Protocol (RSTP) and th e IEEE 802.
12-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Unders tan din g RSTP Understandin g RSTP The RSTP takes ad vantage of point- to-po int wiring and provides rapi d conv ergence of the span ning tree .
12-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Understa nding RST P T o be consistent with Cisco STP implementation s, this guide documents the por t state as bloc k ing instead of discar ding .
12-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Unders tan din g RSTP Figur e 12-1 Pr oposa l and A gr eemen t Handshak ing for R.
12-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Understa nding RST P Figur e 12-2 Sequen ce of Eve nts Dur ing Rapid Conv er ge nce Bridge Protoco l Data Unit Format an d Process ing The R STP BP DU for mat is th e sam e as t he IEEE 802.
12-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Unders tan din g RSTP The RSTP does not have a separate topol ogy chan ge notificati on (TCN) BPDU . It uses the topology change (T C) flag to sho w the to pology cha nges.
12-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Unde rsta ndi n g MS TP • Propagatio n — When an RSTP s witch r ecei ves a TC mess.
12-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Unders tan din g MSTP IST, CIST, an d CST Unlike PVST+ i n which all the spann in.
12-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Unde rsta ndi n g MS TP Operations Between M ST Regions If there are multip le regio ns or legacy 802.
12-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Unders tan din g MSTP Hop Count The IST and M ST inst ances do not use the mes sage- age an d maximum -age informa tion in the configurati on BPDU to comp ut e t he sp an ning- tre e t opolo gy .
12-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Interoperability with 802.1D STP Interoperability with 802.1D STP A switch running both M STP a nd RST P supports a built-in p rotoco l migrati on m ec ha nism t ha t ena bl es it to interoperate with leg acy 802.
12-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Default RSTP and MS TP Configura tion T able 12-3 sh ows the de fault RST P a nd M STP c onfiguration .
12-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Specifying the MST Region Co nfiguration and En .
12-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es configurati on com mand. T o retur n to the default revision nu mber, use the no revision MST conf igurat ion comman d.
12-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Note Th e ro ot swi tch fo r eac h s pan ning -t ree inst anc e shoul d b e a ba ckbon e or dist ribution sw itch .
12-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Configur ing a Se co ndar y R oot S witch Wh.
12-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Port Priority If a l oop occur s, the MST P uses the port priority when selec ting an in terface to put in to the for warding state.
12-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Configuring the Path Cost The MSTP path cost def ault v alue is deri v ed from the media speed of an interf ace.
12-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Switch Priority Y ou can config ure the switch prior ity and make it more lik ely that the switc h will be chosen as the root switch.
12-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Beginn ing in pri vileg ed EXEC mode, follo .
12-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Maxi mum-Aging Time Beginning in.
12-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Specifying the Link Type to Ensure Rapid Tra.
12-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Configuring RSTP and MSTP Displaying the MST Configuration and Status Displaying the MST Configuratio n and Sta.
12-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 12 Co nfiguring R ST P and M ST P Displaying the MST Configu rat ion and Status.
C HAPTER 13-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 13 Configuring Optional Spannin g-Tree Features This cha pter descri b es how to configure opt iona l span ning- t ree fea tu res. Y o u ca n configur e all of the se featu re s whe n you r swi t ch is run ning th e per-VLAN sp anni ng-tre e (PVST ).
13-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understa.
13-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Understanding .
13-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understa.
13-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 13-3 U.
13-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures How CSUF Work s CSUF ensures that one link in the stack is elected as the path to the root.
13-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res The switch sen.
13-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Limitati.
13-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 13-6 G.
13-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understand ing Back boneF ast Backbo neFas t detects ind irect failures in the core of th e backbon e.
13-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res If lin k L 1 fail s as s hown in Figure 13 -8 , Switch C cannot det ect this f ailure bec ause it is not co nnected direct ly to link L1.
13-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Unders tanding Root Gu ar d The Laye r 2 network of a service provide r (SP) can incl ude many co nnectio ns to switche s that are no t owned by the SP .
13-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Understand ing L.
13-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures Default Optional Spanning-Tree Conf iguration T able 13-1 sh ows the default opt iona l spa nn ing- tree co nfigurat ion.
13-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Note Y ou ca n use the spa nning-tre e portfast default global con figuration co mmand to global ly enab le the Port Fast featur e on all nontrun king por ts.
13-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures T o disable BPDU guard, use the no spanning-tree por tfast bpduguard default global configur ation comm an d.
13-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures T o disable BPDU filte ring, use t he no spanning-tree portfa st bpdufilt er default global configurat ion comm an d.
13-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures Enabling C ross-S tack Up linkFas t Before ena bling CSU F , make sure your sta ck switch es are proper ly connec ted.
13-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Enabling Ba ckbon eFast Y o u can en able Bac kboneFast to detect indi rect li nk failures and to start the sp anning- tree reconfigur atio n soo ne r .
13-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures T o disa ble ro ot g uard, use the no spanning-tre e guard interf ace conf igurati on command.
13-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 13 Configuring Op tiona l Spa nni ng-Tree Features Display ing the S panning -Tree St atus Displaying the Sp annin.
13-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 13 Configurin g Optiona l Spann ing-Tr ee Featu res Displaying the Spannin g-Tree Stat us.
C HAPTER 14-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 14 Configuring VLANs This c hapt er d escri b es how to c onfigure norm al -ra nge V LAN s (V L AN IDs 1 to 100 5) and extended-ra nge V LANs (VLAN I Ds 100 6 to 4094 ).
14-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Unders tan ding VLAN s For a Catalyst 295 0 LRE Switch, th e maxim um supported num ber of VLA Ns is 250, t he maximum number of STP inst ances is 64, an d trunkin g is supported.
14-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Unde rst an din g VLA Ns VLAN Port M embership M odes Y o u configure a port to belong to a VLAN by assigning a me mber ship mode that de termin es the ki nd of traf fic the port c arries and t he number of V LANs to which i t can belon g.
14-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing Normal- R ang e VLAN s Configuring Normal -Range VLANs Normal- range VL A Ns are VL ANs with VLA N I Ds 1 to 1005 .
14-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s This sect ion incl udes infor mation ab out these top.
14-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing Normal- R ang e VLAN s • The swi tch supp orts 64 spa nning-t ree instanc es.
14-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Saving VL AN Configur ation The co nfiguration s of VLAN IDs 1 to 10 05 are a lways sa ved in the VLA N database (vlan.
14-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing Normal- R ang e VLAN s Default Ethernet VLAN Configuration T able 14-2 shows the default co nfig uration for Ethernet VL ANs. Note The switch suppo rts Ethe rnet interf aces exc lusi v ely .
14-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Beginning i n privileged EXEC mode, f ollow these st .
14-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing Normal- R ang e VLAN s T o return th e VLAN name to th e defaul t settings, use th e no vlan vlan-id name or no vl an vlan-i d mtu VLAN conf iguration comm and.
14-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Assigning S tatic-Ac cess Ports to a VLAN Y o u can assi gn a s tati c-ac cess port to a VLAN wi tho ut having VT P gl obal ly p rop agate V LAN configurat ion inf orm at ion ( VTP is di sabl ed).
14-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing Extended-R ange VLA Ns Configuring Ex tended-Rang e VLANs When the switch is in VTP transparent mode (VT P disabled) and the EI is installed) , you can create extended -rang e VLA Ns ( in the ra nge 1006 t o 4094).
14-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Confi guring Exte nded-Ra nge VL ANs • STP is enable d by default on extended -range V LANs, but you can di sable it by using the no spann ing- tre e vlan vlan-id global co nfigur ation c omm an d.
14-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Displa ying VL ANs T o delete an extend ed-range VLA N, use the no vlan vlan-i d global configurat ion comm and. The proc edure fo r assign ing stat ic-acc ess port s to an ext ended-r ange VLAN is the s ame as for normal-ra nge VL ANs.
14-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Config uri n g VL AN Tr unk s Configuring VLAN T runks These sec tions descr ibe how VLAN trunks functio n on the swi tch: • T runking O verview , page 14 -15 • 802.
14-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing VLAN Trunk s T o avoid this, yo u s hould configu re int erfac es conn ect ed t o devices tha t do no t sup port DTP to n ot forward D TP frame s, tha t i s, to t urn off DTP .
14-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Config uri n g VL AN Tr unk s • Disabling span ning tree on the na ti v e VLAN of an 802.1 Q trunk without d isabling spann ing tree on e very VLAN i n the network can po tentia lly cause spa nning-t ree loops.
14-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing VLAN Trunk s – STP Port F ast setting – trunk s tat us: i f o ne po rt i n a po rt g rou p ce as es t o b e a t runk, a ll por t s ce ase t o be t runk s.
14-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Config uri n g VL AN Tr unk s This exam pl e shows how to c on figure t he Fast E the rne t i nte rface 0 /4 as a n 802 .1 Q t run k. Th e exam pl e assumes th at the nei ghbor int erface is configure d to support 80 2.
14-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing VLAN Trunk s This e xample shows ho w to remo v e VLAN 2 f rom the allo wed V .
14-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Config uri n g VL AN Tr unk s Beginning i n privileged EX EC mo de, foll ow these s teps to c onfigure th e nat iv e VL AN on an 8 02.
14-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configur ing VLAN Trunk s In thi s way , Trunk 1 c arri es t r affic for VLA Ns 8 t hr oug h 10, a nd Trunk 2 c ar rie s tra ff ic fo r VLA Ns 3 through 6.
14-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Config uri n g VL AN Tr unk s Load Sharing Using STP Path C ost Y o u can co nfigure paralle l trunks to share VLAN traffic by setting di fferent path costs on a trunk and associ ating the path costs with dif feren t sets of VLA Ns.
14-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configuring VMPS Beginn ing in pri vile ged EXE C mode, follo w these steps to conf ig ure .
14-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configuring VMPS • “ Monitori ng the VMPS ” sectio n on pa ge 14-31 • “ T rouble s.
14-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configuring VMPS If the link goes do wn on a dynamic por t, the port retur ns to an isolated state and does not belong to a VLAN.
14-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configuring VMPS ! address <addr> vlan-name <vlan_name> ! address 0012.2233.4455 vlan-name hardware address 0000.6509.a080 vlan-name hardware address aabb.
14-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configuring VMPS VMPS Configuration Guidelines These gui deline s and restric tions app ly to dynami c port VL AN memb ership: • Y o u must co nfigure the VMPS befo re you con figure ports as dyna mic.
14-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configuring VMPS Beginn ing in pri vilege d EXEC mode, follo w these step s to enter the IP address of the VMPS: Note The switch port that is co nnected to the V MPS serv er cannot be a dynamic acc ess port.
14-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configuring VMPS Reconfirming VLAN Memberships Beginning in privileged EXEC mo de, foll ow .
14-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Configuring VLA Ns Configuring VMPS T o retur n the switc h to its def ault settin g, use the no vmps r etry global configura tion c om mand .
14-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 14 Co n figuring VLANs Configuring VMPS VMPS Co nfig ur at ion Ex am ple Figure 14-5 shows a ne twork with a VMPS serve r switch and V MPS client switches with dynamic p orts.
C HAPTER 15-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 15 Configuring VTP This c hapt er d escri b es how to us e t he V LAN Trunking Pr otoc ol ( VTP) a nd t he V LAN dat aba se for managing V LANs .
15-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Unders tan din g VTP The VTP Do main A VTP do ma in ( also c alle d a VLA N ma nage ment domai n ) con sis ts of o ne sw itch or several interconn ected swit ches under th e same a dministrati ve responsibili ty sharing the same VTP d omain name.
15-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Understanding VTP VTP Mode s Y o u can co nfigure a supporte d switch to be in one of the VTP modes liste d in Ta b l e 1 5 - 1 .
15-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Unders tan din g VTP • MD5 diges t VLAN co nf igurat ion, in clud ing max imum tr ansmi ssion unit (M TU) si ze fo r each VLAN.
15-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Understanding VTP Figur e 15-1 Floodi ng T raffi c withou t VTP Pr un ing Figure 15-2 shows a swi tched network w ith V T P pruni ng ena ble d.
15-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Conf igu rin g VTP VTP pruning is not designed to func tion in VTP transparent mode . If one or more switches in the netwo rk are in VTP transparen t mode, yo u should do on e of thes e: • T urn off VTP prun ing in the en tire network .
15-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Configuring VTP VTP Configuration Options Y o u can co nfigure VTP by using these co nfiguration mo des.
15-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Conf igu rin g VTP VTP Configuration Guidelines These sec tions descr ibe guid elines you should fol low when implem entin g VTP in your ne twork.
15-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Configuring VTP VTP Ve rs ion Foll ow these gui delines whe n deciding which VTP ver sion to im plement: • All switches in a VTP domain must run the same VTP versi on.
15-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Conf igu rin g VTP When you con figure a domain na me, it cannot be rem oved; you can only rea ssign a switc h to a different domain. T o retu rn the swi tch to a no-pa sswor d s tate, u se the no vtp password global co nfiguration c omman d.
15-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Configuring VTP This exam ple sh ows ho w to use VLA N configurat ion m ode to configure the sw.
15-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Conf igu rin g VTP Note Y ou ca n also configur e a VTP client by using th e vlan database p ri.
15-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Configuring VTP Note Y ou ca n also configure V TP transpare nt mode by using the vlan dat abas.
15-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Conf igu rin g VTP Enabling V TP Prunin g Pruning inc reases available bandwi dth by restric ting flood ed traffic to those trunk links th at the traffic must use to acces s the destinat ion devices.
15-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Configuring VTP Adding a VT P Client S witch to a VT P Domain Before adding a V TP clien t to a.
15-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 15 Configuring VTP Monito rin g VTP Monitoring VTP Y o u mon itor V TP by di sp layin g VT P configu ratio n in for matio n: th e dom ain name , the c ur rent V T P revision, and the n umb er of VL AN s.
C HAPTER 16-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 16 Configuring Voic e VLAN This ch apt er descr ibes how to configure the voice VLAN f eature on yo ur sw itch. V oice VLA N is re ferred to as an auxiliary VLAN in the Cata lyst 6000 f amily swi tch do cumentation.
16-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 16 C onfiguring Voice VLAN Configuring Voic e VL AN Figure 16-1 shows one way to conne ct a Cisco 7 960 IP Phone.
16-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 16 Configuring Voice VLA N Configuring Voice VLAN Voice V LAN Con figuration Guide lines These a re the v oic e VLAN con figu ration guid elines: • Y o u shou ld configu re voice VLA N on swi tch a cce ss port s.
16-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 16 C onfiguring Voice VLAN Configuring Voic e VL AN Configuring Ports to Carr y Voice Traffic in 802.1Q Frames Beginn ing in pri vileg ed EXEC mode, follo w thes e steps to conf igure a port to carry v oice traf fic in 802.
16-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 16 Configuring Voice VLA N Configuring Voice VLAN Overriding the CoS Pr iority of Incoming Data Frame s Y o u can conne ct a PC or o t her dat a device to a Cisco 7960 IP Phon e por t .
16-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 16 C onfiguring Voice VLAN Displa ying Vo ice VLA N Configuring the IP Phone to Tr ust the CoS Priority of Inc oming Data Frames Y o u can conne ct a PC or o t her dat a device to a Cisco 7960 IP Phon e por t .
C HAPTER 17-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 17 Configuring IGMP Sno oping an d MVR This cha pter d escribes h ow to configure In ternet Gr oup Ma nageme nt Prot ocol (IGM P) snoop ing on your switch, including an applicatio n of loca l IGMP snoopi ng, Multica st VLAN Re gistration (MVR).
17-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Unders tan ding IGM P Snoo ping the switc h adds the host p ort numb er to the for wardin g table en try; when it recei ves an IGMP Lea v e Group message from a host, it remo ves the host port from the table entry .
17-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Understanding IGMP Snooping Figur e 17 -1 Initial IGMP J oin Messag e Router A se nds a genera l query to t he switc h, which f orwards the qu ery t o ports 2 thro ugh 5, a ll members of the same VLAN.
17-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Unders tan ding IGM P Snoo ping Figur e 17 -2 Second Host Joi ning a Multi.
17-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Note Y o u shou ld on ly u se the I mm ediat e- Leave proc essin g feat ure on V LANs wher e a si ng le h ost i s connect ed to each port.
17-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Configuring IG MP Sn ooping Beginning i n privileged E X EC mo de , follow.
17-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Beginn ing in pr i vileged EXEC m ode, follo w t h.
17-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Configuring IG MP Sn ooping T o rem ov e a mul ticast route r port f rom the VLAN, use the no ip igmp snooping vlan vlan- id mr outer interface inte rface-id global configurat ion comm and.
17-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping This e xample sho ws how to statically conf igure a hos t on an interface and verify the co nfig uration: Switch# configure terminal Switch(config)# ip igmp snooping vlan 1 static 0100.
17-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Configuring IG MP Sn ooping If you disable IP multicast- source-only lea .
17-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information Displaying IGMP Snooping Information Y o u can di spla y IG MP snoo ping inf orm ati on for dyn am ica lly l ear ne d and st at ical ly c on figured rou ter ports and V LAN interfac es.
17-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Displaying IG MP Sn ooping Informa tion IGMP snooping immediate-leave is .
17-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Underst anding Multicast VLAN Registration Understandin g Multicast VL AN R.
17-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Unde rs ta n din g Mu ltic as t V LAN Reg i stra t io n When a subscriber chan ges channels or turns of f the tele vision, the set-to p box sends an IGMP leav e messag e for th e mult icast st ream.
17-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Configuring MVR MVR elimin ates the need to duplicate tele vision-c h annel multi cast traf fic for subscribers in e ach VLAN.
17-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Conf igu rin g MVR MVR Configuration Guidelines and Limitations Foll ow these gui delines when conf iguring MV R: • Receiver ports cann ot b e t runk p ort s.
17-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Configuring MVR T o return t he switch t o its defa ult settin gs, use the no mvr [ mode | group ip-a dd ress | querytime | vlan ] global configurati on comm ands.
17-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Conf igu rin g MVR T o return the inter face to its default settings, u se the no mvr [ type | immediate | vlan vl an-id | group ] interf ace conf igu ration com mands.
17-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Displaying MVR Information This is an example of output fro m the show mvr interface privileged EXE C c omm and w hen th e member keyword is inc lud ed : Switch# show mvr interface fastethernet0/2 members 224.
17-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Conf igu ring I GMP Filt eri ng This is an example of output fro m the show mvr interface privileged EXEC com mand for a spe cified interf ace: Switch# show mvr interface fastethernet0/2 224.
17-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lt e ri n g Default IGMP Filtering Configuration T able 17-7 shows the default IGMP f iltering configura tion.
17-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Conf igu ring I GMP Filt eri ng T o delete a profil e, use the no i p igmp p rof ile pr of ile numb er global configurat ion comm and.
17-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lt e ri n g Current configuration : 123 bytes !.
17-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 17 Co nfiguring IGMP S noo ping and M VR Displaying IGMP Filterin g Configura ti on Displaying IGMP Filtering Conf.
C HAPTER 18-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 18 Configuring Port-Base d Traffic Control This chapte r des cribes how t o conf igure th e port-b ased traf fic contro l featur es on your switch .
18-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Configuring Stor m Control The rising t hresho ld is the p erce nt age of to tal a v a ilab le b andwi dth assoc iate d with m ultica st, broad cast, or unicast t raf fi c before forwarding is block ed.
18-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port -B ased Tra ffic Control Configuring Protected Ports Disabling Stor m Co nt rol Beginning i n p.
18-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Configuring Port Security Beginning in privileged EXE C mode, foll ow these step s to define a port as a pro tected port: T o disable prot ected p ort, use th e no switchport protected interface configurat ion comm and.
18-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Understand ing Port Secu rity This sect io.
18-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Configuring Port Security This i s a n exampl e of t ext fr om the r un.
18-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Default Port Security Configuration T able 18-1 shows the default por t security conf iguration for an interface.
18-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Configuring Port Security Step 5 switchport port-security maximum value (Optional ) Set the maxim um numbe r of secure MA C address es for the interface .
18-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty T o retur n the inter fac e to the de fault conditi on as not a secure p ort, use the no switchport port -security interf ace co nf igurati on com mand.
18-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Configuring Port Security This e xampl e sho ws how to co nf igure a s.
18-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Beginn ing in pri vilege d EXEC mode, fol.
18-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 18 Configuring Port-Based Traffic Co ntro l Displaying Port-Base d Traffic Cont rol Settings Displaying Port-Based.
C HAPTER 19-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 19 Configuring UDLD This c hapt er d escri b es how to c onfigure the Un iDi rec tiona l Li n k De tect ion (UD LD) pr otoc ol o n y our switch.
19-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 19 Co nfiguring UDLD Unders tan ding UDL D UDLD oper ates b y using two mech anisms: • Neighbor datab ase mainten.
19-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 19 Configuring UD LD Configuring UDLD Configuring UDLD This se cti on de scri bes how to c onfigure UD LD o n your sw it ch.
19-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 19 Co nfiguring UDLD Conf igu ring U DLD Enabling UDL D Globally Beginning in privileged EXEC mode , foll ow these .
19-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 19 Configuring UD LD Configuring UDLD T o disabl e UDLD on a no n-f ibe r- opti c inte rface , use the no udld enable interf ace conf igura tion comm an d.
19-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 19 Co nfiguring UDLD Displa ying U DLD Statu s Displaying UDLD Status T o display the UDLD stat us for the s pecif ied i nterf ace or for all interf aces, use the show udld [ interface-id ] pri vileged EX EC comm and.
C HAPTER 20-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 20 Configuring CDP This c hapt er d escrib es how to configure Cisc o Discovery Pro toco l ( CDP ) on your swi tch .
20-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 20 Co nfigu ri n g CDP Conf igu rin g CD P Configuring CDP These sec tions inclu de CDP con figuration info rmatio.
20-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 20 Configuring CDP C onfiguring CDP Use the no form of the CDP commands to return to the def ault settings. This e xample sho ws how to confi gure an d veri fy CDP character istics .
20-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 20 Co nfigu ri n g CDP Conf igu rin g CD P This example shows how to enable CDP if it has been di sabled .
20-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 20 Configuring CDP Monitoring and Maintaining CDP Monitoring and Maintaining CDP T o mon itor a nd mai ntai n CDP on yo ur device, per form one o r mor e of t hese ta sks, begi nnin g in privileged EXEC mo de .
20-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapte r 20 Co nfigu ri n g CDP Monito rin g and Mai nt aining CDP.
C HAPTER 21-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 21 Configuring SPAN and RSPAN This chapte r descr ibes ho w to co nf igure Switc hed Port Analyzer (SP AN) and Remote SP AN (RSP AN) on your switch.
21-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN Figur e 21 -1 Example SP AN Configur ation Only traf.
21-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Understanding SPAN a nd RSPAN SPAN and RS PAN Conc epts a nd Terminology This secti on descri bes conce pts and te rminology associate d with SP AN and RSP AN co nfiguration.
21-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN standard a nd extende d output ACLs for unicast a nd ingress QoS policing .VLAN ma ps, ingress Q oS policing, and p olicy-based routing .
21-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Understanding SPAN a nd RSPAN Destination Port Each local SP AN sessio n or RSP AN de.
21-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN • Spanning tree is au tomati cally disabl ed on a refl ecto r port. • A refl ector port recei v es co pies o f sen t and recei v ed t raf f ic fo r all m onitor ed sou rce port s.
21-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Understanding SPAN a nd RSPAN SPAN and RS PAN Interac tion with Other F eatures SP AN interacts with th ese featur es: • Routing — Ingress SP AN does not mo nitor r outed traf f ic.
21-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring SPAN SPAN and RS PAN Sess ion Limits Y o u can co nfigure (and st ore in NV RAM) a m aximum of t wo SP AN or RSP A N sessions o n each sw itch.
21-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring SPAN • When yo u con figure a switc h por t as a SP AN dest ination port, it is no l ong er a norm al switc h por t ; only m onitore d traffic passes thr oug h th e SP AN dest inatio n p ort.
21-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring SPAN This exam ple shows how to set up a SP AN sessi on, s essi on 1 , for m oni tor ing s our ce p ort t raffi c to a destinati on port .
21-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring SPAN Removin g Ports from a SPAN Session Beginning in pr ivileged EXEC m.
21-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring SPAN Specifying VLANs to Monitor VLAN monitor ing is similar to port monitoring.
21-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring SPAN Specifying VLANs to Filter Beginn ing in p ri vil eged EXEC mode , .
21-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring RSPAN Configuring RSPAN This secti on descri bes how to configure RSP AN on you r switc h.
21-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring RSPAN • Y o u shou ld cre ate a n RSP AN VL AN befo re c onfiguring a n RS P AN sou rce or de stina tion s ession .
21-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring RSPAN This example shows ho w to clear any existing RSP AN configur ati.
21-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring RSPAN Removin g Ports from an RS PAN Session Beginning i n privileged EX.
21-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Configuring RSPAN Specifying VLANs to Monitor VLAN monitor ing is similar to port monitoring.
21-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 Configuring SPAN and RSPAN Configuring RSPAN Specifying VLANs to Filter Beginn ing in pri vilege d EXEC mode, f.
21-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 21 C onfiguring SPAN and RSPAN Displaying SPAN and RS PAN Status Displaying SPAN and RSPAN Status T o display the statu s of the current SP AN or RSP AN configuratio n, use the show monitor pri vilege d EXEC co mmand.
C HAPTER 22-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 22 Configuring RMON This ch apter descr ibes how to con figure Remote Network Mo nitori ng (RMO N) on your swit ch.
22-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 22 Co n figuring RM ON Conf igu ring R MON Figur e 22-1 Remot e Mo nito r ing Exam ple The switc h supports t hese .
22-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 22 Configuring RMON Configuring RMON Note RM ON configuration , statu s, and di splay for rem ote CP E FE interfac es is suppor ted thro ugh SNMP onl y by using the RMON-MIB.
22-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 22 Co n figuring RM ON Conf igu ring R MON T o disable an al arm, use th e no rmo n alar m num ber global configura t ion com mand on e ach al arm you configured . Y ou c anno t disa ble at on ce a ll t he ala rms tha t yo u c on figured.
22-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 22 Configuring RMON Configuring RMON Configuring RMON Collection on an Interface Y o u must first c onfigure RM ON al ar ms an d events to displa y co llec tion i nf orma tio n.
22-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 22 Co n figuring RM ON Displa ying RM ON Sta tus T o disabl e the co llecti on of g roup E thern et sta tistics , use th e no rmon collec tion stats index interf ace configurati on comm a nd.
C HAPTER 23-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 23 Configuring System Message Logg ing This c hapter d escrib es how to c onfigure system me ssage log ging on your sw itch.
23-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Configuring Sy stem Me ssage Logging .
23-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuring Sys te m Message L ogging Config uring Syst em Message Logging This example shows a partial switch s.
23-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Disabling an d Enab ling Me ssage Lo gging Message logging is enab led by de fault. It must be enabled to send messages to any destination othe r than the conso le.
23-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuring Sys te m Message L ogging Config uring Syst em Message Logging The logging buffered globa l configur ation comm and c opies l ogging messa ges to a n inte rnal buffer .
23-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Synchronizing Log M essages Y o u can.
23-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuring Sys te m Message L ogging Config uring Syst em Message Logging T o disable syn chroni za t ion of un.
23-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Enabling a nd Disab ling Seq uence Nu.
23-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuring Sys te m Message L ogging Config uring Syst em Message Logging Note Spe cifying a level c auses messages at that le v el an d numerical ly lo wer le v els to be displayed a t the destination.
23-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Limiting Syslog Messages Sent to the.
23-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuring Sys te m Message L ogging Config uring Syst em Message Logging Logging Messages to a UNIX Syslog Daemo n Before yo u ca n send system log m essages to a UNIX syslog server , you m ust con figure the syslog daemon on a U N IX ser ver .
23-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 23 Configuri ng System Me ssage Logging Display ing the Log gi ng Configur ation T o remov e a syslog s erv er , use the no logging host globa l configurati on co mman d, and spe cify the syslog server IP address.
C HAPTER 24-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 24 Configuring SNMP This chapt er describ es ho w to configure the Sim ple Network Mana gement Prot ocol (SNM P) on your switch.
24-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Unders tan ding SNMP • Using SNMP to Access MIB V ariables, page 24-4 • SNMP Notif ica tion.
24-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Under standin g SNMP Y ou must co nfigure the SN MP agent to use the SNMP version support ed by the manage ment stat ion.
24-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Unders tan ding SNMP SNMP Community String s SNMP comm unity stri ngs authent icate acc ess to MIB object s and functio n as embedde d passwords.
24-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Configuring SNMP SNMP Notifications SNMP allo ws t he switch to send n otif ications to SNMP manager s when p articular ev ents occur . SNMP notifications ca n be sent as tr aps or inform request s.
24-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Conf igu rin g SNMP Default SNMP Configuration T able 24-3 sh ows the de fault SNM P c onfigurat ion. SNMP Configuration Guidelines An SNMP gr oup is a table th at ma ps SNM P use rs to SN MP views.
24-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Configuring SNMP Disabling the SNMP Agent Beginn ing in pr iv ileged EXEC mode, f ollo w these.
24-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Conf igu rin g SNMP Note T o disabl e acce ss for an SNM P commun ity , set th e comm unity string for that co mmunity to the null string (do not enter a value for th e communi ty string ).
24-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Configuring SNMP Beginn ing in pri vileg ed EXEC mode, follo w these st eps to confi gure SNMP on the switch: Command Purpo se Step 1 c onfigure te rmina l Enter global configurat ion mode .
24-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Conf igu rin g SNMP Configuring SNMP Notifications A trap manag er is a mana geme nt statio n that recei ves and pro cesses tr aps. T rap s are sys tem alerts that the switc h gener ates whe n cert ain events occu r .
24-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Configuring SNMP Some noti fication type s can not be c ontr olled wi th the sn mp-se rver ena ble globa l configurati on comm an d, for exampl e, tty a nd udp-port .
24-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Conf igu rin g SNMP The snmp-serv er host co mmand s pecif ies which ho sts rec eiv e th e noti fica tions. T he snmp-serv er enab le trap command global ly enable s the mech anism for the specif ied notif icatio n (for tra ps and informs ).
24-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Configuring SNMP Setting th e Agent C ontact and Location In formation Beginn ing in pri vile.
24-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Conf igu rin g SNMP SNMP Examp les This example shows ho w to enable all versions of SN MP . Th e configurati on permi ts any SNMP manager to access all objects with read-only permissions using the co mmunity string public .
24-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNM P Disp la yin g S N M P S t at us Displaying SNMP Status T o display SN M P input and o utput s.
24-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 24 Configuring SNMP Displaying SNM P Status.
C HAPTER 25-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 25 Configuring Network Security with ACLs This cha pter d escri bes how to configu re net work se curit y on yo ur swi tch by usi ng a cce ss contr ol l ists (A CL s), whic h are also ref erred to in comm ands an d tables as acce ss lists .
25-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Unders tandin g A CLs Understandin g ACLs Pack et f ilterin g can limit net work traff ic and restrict netw ork use b y certain users or de v ices.
25-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Unde rsta ndi n g AC Ls Figur e 25-1 Usi ng AC Ls to Contr ol T raff ic t o a Netw or k Handling Fragmented and Unfragmented Traffic IP packets can be fragment ed as they cross the ne twork.
25-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Unders tandin g A CLs • Packet A is a TCP pa cket fro m ho st 10. 2. 2.2, po rt 65000 , go ing to h ost 10.1. 1.1 on th e SMTP por t.
25-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Unde rsta ndi n g AC Ls • Layer 4 fields: – TCP (Y ou c an sp eci fy a T CP so urce , de stin ation po rt n um ber, or both a t the same time.
25-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Guidelines for Applying ACLs to Physical Interfaces When ap plyi ng ACLs to physic al in terfaces , f oll ow these configura tion g uide lines: • Only one A C L can be attached to an interface .
25-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs Unsupporte d Features The switc h does not support t.
25-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs ACL Numbers The numbe r you use to denote your A CL shows the type of access list th at you ar e cre ating.
25-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs Creating a Numbered Standard ACL Note For info rmati.
25-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs This exampl e shows ho w to creat e a standard ACL to deny access to IP host 171 .69.1 98.102, pe rmit access to an y others, and display the results.
25-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs Note Th e switc h does not supp ort dyna mic or reflexive access lis ts. It al so does n ot suppor t filtering based on the min imize -mon eta ry-co st typ e of servic e (T oS ) bit.
25-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Beginn ing in pri vileg ed EXEC mode, follo w these st eps to create an exte nded A CL: Command Purp ose Step 1 co nfi gure terminal Ent er g loba l c onfigura tion m od e.
25-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs Use the no a ccess-lis t a ccess-list-number gl obal conf igurat ion command to dele te the entire access list.
25-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Be ginning in pri vile ged EXEC m ode, fo llo w .
25-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs When ma king t he stan dar d an d extend ed A CL, r.
25-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs T o remov e a conf igu red time -ran ge, use the no time-r ange ti me-range-nam e globa l c onfigura tion comm and.
25-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs deny tcp any any time-range new_year_day_2000 (inac.
25-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs In this exam ple, the Jones subnet is not allo w.
25-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Confi guring ACLs This exam ple sh ows how to cr eate an d displ ay a n acc ess l ist name d mac1 , denying o nl y E the rT yp e DECnet Phase IV traf f ic, b ut permitting all other types of traf f ic.
25-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Applying ACLs to Ter m in al Lines or Phy sical Inter faces Applying.
25-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Displaying ACL Information Applying ACLs to a Physical Interface Begi.
25-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Displa ying A CL Inf ormati on Displaying ACLs Y ou ca n display existi ng A CLs by using show commands.
25-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Examples for Compiling ACLs Displaying A ccess Groups Note Th is fea ture is available o nly i f your sw itch i s r unn ing the EI .
25-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Examples fo r Compilin g ACLs Use swi tch A CLs to d o these: • Create a standa rd A CL, and filter traff ic fr om a spe cific Interne t host with an addre ss 172.
25-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Configuring Net work Securi t y with ACLs Examples for Compiling ACLs Numbered ACL Examples This example shows that the swi tch accept s addre sses on networ k 36.
25-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 25 Con figuring Ne two rk Sec urity with ACLs Examples fo r Compilin g ACLs In this ex ample o f a num bered A CL,.
C HAPTER 26-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 26 Configuring QoS This chapter descr ibes ho w to conf igure quality of service (QoS) b y using QoS com mands. W ith QoS, you can p rovid e preferen tial treatm ent to cert ain types of traf fi c at the e xpense o f others.
26-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Unders tan ding QoS • V ideo w izard — Giv es traff ic th at origin ates from speci fied video servers a highe r priori ty than the prior ity of data t raf f ic.
26-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Under sta n din g Q oS Figur e 26-1 QoS Cl assificatio n Lay ers in F ram es and P ack ets All .
26-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Unders tan ding QoS • Markin g e va luates the policer an d conf iguration info rmation.
26-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Under sta n din g Q oS The trust DSCP con figur ation is meaningless fo r non-IP traf f ic.
26-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Unders tan ding QoS Classification Based on Class Maps and Policy Map s A class map is a mechanism th at you use to isol ate and n ame a specif ic tr af fic flo w (or clas s) from all other traf f ic.
26-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Under sta n din g Q oS • Only one policer can be applied to a pack et in the input direc tion. • Only t he a verag e rate and com mitted b urst parameter s are co nf igurable.
26-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Unders tan ding QoS Port Prior ity Frames rec ei ve d from users in the adminis trati v ely-def ined VLANs are clas sif ied or tagge d for transmission to other de vices.
26-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Configuring QoS Before configur ing QoS, you must hav e a thoroug h understand ing of the se items: • The type s of applica tions used and the traffic patterns on yo ur network.
26-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Configuration Guidelines Note Th ese guide lines are applicab le only if you r switch is ru nning the E I.
26-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Note Both the EI a nd SI support this featur e. Configuring the Trust State on Po rts within the QoS Domain Pa ckets en tering a QoS domai n are classi fied at the edge of the QoS dom ain.
26-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Beginn ing in pr iv ilege d EXEC mode, follo w the se steps to conf i.
26-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Configuring the CoS Val ue for an Interface QoS assigns the CoS v al ue specif ied with the mls qos cos interfac e conf igu ration c ommand to unta gged frames re ceived on trusted and untrust ed port s.
26-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Ho we ver , if a user byp asses the telep hone and c onnects th e PC .
26-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Enabling Pass-Through Mode In software rel eases earl ier than Re lease 12.
26-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Configuring a QoS Policy Note Th is fea ture is available o nly i f your sw itch i s r unn ing the EI .
26-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S For more information abo ut creating IP standar d A CLs, see the “ Guidelin es f or A pplying ACLs to Physica l Interfa ces ” section on page 25-6 .
26-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Beginn ing in pri vileg ed EXEC mode, follo w the se steps to create an IP exte nded A CL for IP tra ff ic: Command Purpose Step 1 conf igure t erminal Enter glo bal configurat ion m ode.
26-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S For more information about crea ting IP exten ded A CLs, see the “ Guidelines for Applyi ng A CLs to Physica l Interfa ces ” section on page 25-6 .
26-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS This e xample sho ws ho w to cr eate a Lay er 2 MA C A CL wit h a permit s tatement. Th e statem ent allo ws traff ic from the host wi th MA C address 0001.
26-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S T o delete an exi sting class ma p, u se the no class-map cl ass-map- name gl obal conf igur ati on com man d.
26-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Beginning in privileged EX EC mode , follow these steps t o create a po licy map: Command Purpose Step 1 conf igure t erminal Enter glo bal configurat ion m ode.
26-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S T o delete an e xisting polic y map, use the no policy-map poli cy-m ap-n ame global configuration comm and. T o de lete an existi ng class ma p, use the no clas s class-map-nam e poli cy-map co nfigurati on comma nd.
26-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Switch(config)# access-list 1 permit 10.
26-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Configuring the CoS-t o-DSCP Map Y ou use the CoS- to-DSCP ma p to map CoS v alues in incomin g pack ets to a DSCP v alu e that Qo S uses internall y to rep resent the priority o f the tr af fic .
26-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Conf igu rin g QoS Configuring the DSCP-to- CoS Map Y o u use the DSCP- to-CoS ma p to map DSCP values in incom ing pac kets to a Co S value, which is used to sele ct one of the fou r egress queues .
26-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S Configur ing Qo S Config ur ing Co S an d WRR Note Th is feature is supported by both the EI and SI.
26-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS Displa ying QoS Infor mation T o di sable th e WRR sche dule r an d ena ble th e st rict pri ori ty sc he du ler, use the no wrr -queue bandwidth globa l configuration command.
26-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S QoS Config uratio n Examples QoS Configuration Exa mples Note These ex amples are applicab le only i f your switc h is run ning the EI .
26-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS QoS Configura tion Examp les QoS Configuration for the Existing Wiring Closet The exi sting wiring closet in Figure 26-4 consi sts of existing Ca talyst 290 0 X L and 3500 X L switche s.
26-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 26 Configuring Qo S QoS Config uratio n Examples Step 9 police 5000000 819 2 exce ed-ac tion drop Def ine a p olicer f or the classi fie d vide o traf f ic to drop tr af fi c that exc eeds 5-Mb ps a v erag e tra f f ic rat e with an 81 92-b y te b u rst size .
26-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapt e r 2 6 Co nf igur ing Q oS QoS Configura tion Examp les.
C HAPTER 27-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 27 Configuring EtherChannels This cha pter descri bes how to configure Ether Channel on Layer 2 interfaces. EtherCha nnel provi des fault-to lerant high- speed links betw een switc hes, ro uters, and ser vers.
27-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Unders tan ding Ether Channels Figur e 27 -1 T ypical EtherChanne l Configur ation Each Et h erCha nne l ca n co ns is t of up to eigh t com pa tib ly configur ed Ethe rn et i nte rface s.
27-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 27 Configuring Eth erCh annels Understa nding Et herChann els Figur e 27 -2 Relationship of P h ysical P orts, Lo g.
27-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Unders tan ding Ether Channels PAgP Modes T able 27-1 sh ows the user-configurab le Ethe rC han nel mode s f or the channel-group interfa ce configurati on comm a nd: on , auto , and desi r abl e .
27-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 27 Configuring Eth erCh annels Understa nding Et herChann els Physical Learners an d Aggregate-P ort Learners Network devices are cla ssified as P AgP physic al lea rner s o r a ggregate- por t l ear ne rs.
27-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Unders tan ding Ether Channels Use the option tha t provi des the greatest v ariety in your conf iguration.
27-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 27 Configuring Eth erCh annels Config uring Et herCh annels Configuring Eth erChannels These sec tions descr ibe ho.
27-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Configur ing Eth erChann els EtherChann el Configuratio n Guidelin es If improperly co nf igured, some EtherCh annel interf aces are automatic ally disabled to a v oid network loops and ot her pr oblems.
27-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 27 Configuring Eth erCh annels Config uring Et herCh annels Beginn ing in pri vileg ed EXEC mode, follo w these st .
27-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Configur ing Eth erChann els T o remove an inte rface from the Et herC hannel group, u se the no channel-group interface co nfiguration comm and.
27-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 27 Configuring Eth erCh annels Displa ying Ethe rChannel and PAgP St atus T o ret urn EtherCh annel load balancing to the d efault c onfig uration, u se the no port-channel load-balanc e global con figurati on comm and.
27-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 2 7 Configur ing Ethe rChannel s Displaying Eth erCh annel and PA gP Status.
C HAPTER 28-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 28 Troubleshooting This chapte r describes ho w to identify and resolv e software prob lems related to the IOS softwa re.
28-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting LRE St atisti cs T a ble 28-1 Ether net P ort Sta tistics Statistic T ype Explanation T ransmi t Unicast Frames The to tal numbe r of well -formed un icast frame s sent by a port.
28-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng LRE Stat istics Multicast Frames Th e total number of well- formed multica st fra mes recei ved b y a port. It e xcludes f rames received with errors, wit h unicast or br oadcast de stination addresses, or with oversized or undersi zed frame s.
28-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting LRE St atisti cs T able 28-2 LRE Li nk Statistics Statistic T ype Explanation Upstrea m Ba ndwi.
28-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng LRE Stat istics Late Collisions The total number of frames disca rded because of late c ollisions detect ed during transmission. It includes all transmit frames that ha d a collision after the transmission of the frame's 64th byte.
28-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Using Re covery Procedu res Using Recovery Proced ures These re covery procedur es requir e tha.
28-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng Using Reco very Pr ocedures Step 3 Unplug the swi tc h power cor d. Step 4 Press the Mode button, and at th e same time, reconnect the pow er cord to the switch.
28-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Using Re covery Procedu res Step 13 Copy the c onfiguration file into memory: switch# copy flash: config.text system: running-config Source filename [config.
28-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng Using Reco very Pr ocedures Replacing a Failed Command Switch with a Cluster Member T o replac.
28-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Using Re covery Procedu res Step 11 Respond to the questions in the setup program. When prom pted for t he host n ame, reca ll that on a comman d switch, the host nam e is limite d to 28 charac ters; on a member switch to 31 character s.
28-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng Using Reco very Pr ocedures Basic management setup configures only enough connectivity for ma.
28-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Preventing Autone gotiati on M ismatche s Preventing Autone gotiation Mismatc hes The IEE E 802.
28-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng GBIC and SF P Module Securi ty and Ide ntif icati on GBIC and SFP Module Security and Identif.
28-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Using D ebug Command s Using Debug Commands This sectio n explains how you use deb ug com mands to dia gnose a nd resolve inter networki ng prob lems.
28-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Troublesho oti ng Usin g th e c ra shi n fo Fi le Enabling All-Sy stem Diag nostics Beginn ing in pri vile ged .
28-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Chapter 28 Trouble shooting Using t he c rashinfo File Each ne w crash info fi le that is created uses a sequen ce number that is lar ger than any pre vious ly-exi sting sequence number , so the f ile with the lar gest sequence n umber describes the most re cent failu re.
A- 1 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 APPEND IX A Supported MIBs This appendix l ists the supp orted mana gement i nformat ion base (M IBs) for this re lease.
A- 2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendi x A Support ed MIBs Using FTP t o Acces s the MIB Fi le s • CISCO-TCP-MIB • CISCO-VL AN-MEMB ERSHIP-M IB • CI.
A-3 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix A Support ed M IBs Using FTP to Access the MIB Files Step 5 Chan ge di rector ies to wsc2 900xl for a list of Catalyst 2900 X L MIBs. Step 6 Use the get MIB_f ilename command to obtain a copy of the MIB file.
A- 4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendi x A Support ed MIBs Using FTP t o Acces s the MIB Fi le s.
B-1 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 APPEND IX B Working with the IOS File System, Configuration Files, and Software Imag es This a ppend ix desc ribe s how to manip ul ate t he Flash file s ystem , how to copy c on figurati on files, an d how to archiv e (upload an d download) software i mages.
B-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w it h t he F lash File S.
B-3 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with the Flash File .
B-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w it h t he F lash File S.
B-5 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with the Flash File .
B-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w it h t he F lash File Sy st em Use the /rec ursiv e keyword for deleting a director y and all subdire ctori es and the files contai ned in it.
B-7 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with the Flash File .
B-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Files • For the T ri vial Fil e T ransfer Pr otocol (TFTP), the synt ax is tftp: [[ // lo cation ] / dir ectory ] / tar -f ilename .
B-9 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration Files Yo u c a n c o p y ( uploa d ) conf iguration f iles fr om the switch to a f ile serve r by u sing TFTP , FTP , or RCP .
B-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Fil.
B-11 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration .
B-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Fil.
B-13 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration Files Copying Configuration Files By Using FTP Y o u can co py configuration f iles to or fro m an FTP server .
B-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Files NVRAM.
B-15 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration Files Switch# copy ftp: nvram:startup-config Address of remote host [255.
B-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Fil.
B-17 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration .
B-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working w ith Con figuration Fil.
B-19 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with Configuration .
B-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images Deleting a Stored Config uration File T o delete a sa ved configurati on from Flash memory , use the delete flash: f ilen ame privileged EXEC comm and.
B-21 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Images tar File Forma t of Images on a Server o r Cisco.
B-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images Copying Imag e Files By Us ing TF TP Y ou can do wnload a switch image fr om a TFTP serv er or u pload the image f rom the switc h to a TFTP server .
B-23 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Images Downloading an Image File By Using TFTP Y ou can do wnlo ad a n ew image f ile and rep lace the curr ent imag e or k eep th e curren t imag e.
B-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images N.
B-25 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Images Cautio n For the download and up load al gorithms to operate properl y , do not rename imag e names.
B-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images B.
B-27 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Imag.
B-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images The alg orithm insta lls the do wnlo aded ima ge onto t he system board Flash dev ice (fla sh:).
B-29 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Imag.
B-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images For th e R CP c op y re qu est to e x ecute succ es sf ully , an account mu st be de f in ed on th e n et wor k serv e r fo r the remo te userna me.
B-31 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Imag.
B-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images If yo u sp ecify the /lea ve- old-sw , the e xisting f iles ar e not rem o ved .
B-33 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 Append ix B Workin g w ith the IOS Fi le System, Co nfigu ration Fi les, and Soft w are Imag es Working with So ftware Imag.
B-34 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-14982-01 Appendix B Working with the IOS File System , Configura tion Files, an d Software Ima g es Working wi th Soft ware Images.
IN-1 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 INDEX Numerics 802.1 D See STP 802.1 Q and trunk ports 9-2 config urati on limitat ions 14-16 nati ve VL AN fo r un tagge d tr affic 14-20 trunk m ode 3-10 802.1 S See MSTP 802.
Index IN-2 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 displaying i nterfac e 25-23 exam ple s of 25-23 exten ded I P configuring for QoS classi fication 26-18 crea ting 2.
Inde x IN-3 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 ARP table address resolution 7-61 managing 7-61 asymmetric d igital subs criber line See ADSL attribute s, RADIUS ve.
Index IN-4 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 disabling 18-3 browser conf i gurat ion 3-1, 6-1 buttons, CMS 3-30 C cables , monit oring for uni direct ional links.
Inde x IN-5 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 See CMS clusters, switch acce ssing 6-15 adding me mber swit ches 6-20 automatic d iscovery 6-5 automatic r ecovery .
Index IN-6 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 no and defaul t 2-5 setting privileg e levels 7-8 comm an d sw it ch acce ssing 6-13 active (AC) 6-12, 6-23 comman d.
Inde x IN-7 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 config uring duplex mo de 10-7 for an LRE upg rade 10-15 LRE por ts 10-5 speed on Cisco 575 LR E CPE 10-8 config-vla.
Index IN-8 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 RMON 22-3 RSPAN 21-8 RSTP and M STP 12-12 SNMP 24-6 SPAN 21-8 STP 11-10 system message logging 23-3 system name and .
Inde x IN-9 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 using FTP B-26 using RC P B-30 using T FTP B-23 DSCP 1-6, 26-2 DSCP-to-CoS ma p for QoS 26-26 DTP 1-5, 14-15 duplex .
Index IN- 10 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 ETSI 1-2 European T elecommunicatio n Standard s Institute See ETSI even ts , RMON 22-3 exam ples convent ion s fo.
Inde x IN- 11 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 G GBICs 1000BASE -L X/LH modul e 1-10 1000BASE -SX m odu le 1-10 1000BASE -ZX modul e 1-10 CWDM m odul e 1-20 Giga.
Index IN- 12 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 config urati on servic e 5-2 describe d 5-1 even t s ervi c e 5-3 describe d 1-7 support fo r 1-3 IEEE 8 02.
Inde x IN- 13 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 exten ded , crea tin g 25-10 for QoS clas sificat ion 26-16 implici t deny 25-9, 25-13, 25-15 implicit m asks 25-9.
Index IN- 14 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 troublesh ooting 28-12 LRE li nk monitor 10-14 persistence 10-14 LRE li nks See LRE ports LRE por ts config uring .
Inde x IN- 15 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 manageme nt VLAN chan ging 6-18 consider ations in switch cluster s 6-8, 6-9, 6-18 discovery thr oug h d iffere nt.
Index IN- 16 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 describe d 12-10 BPDU filtering describe d 13-3 enab lin g 13-16 BPDU guard describe d 13-3 enab lin g 13-15 CIST,.
Inde x IN- 17 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 MVR configur ing interfaces 17-17 default conf igur ati on 17-15 describe d 17-13 modes 17-17 monitoring 17- 19 se.
Index IN- 18 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 passwords default conf igur ati on 7-2 disabling re cove ry of 7-5 encr ypting 7-4 in clusters 6-16, 6-20 in CMS 3.
Inde x IN- 19 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 port-cha nnel See E ther Chann el Port Fast describe d 13-2 enab lin g 13-14 mode, s pa nning t ree 14-28 support .
Index IN- 20 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 CMS 3-31 comm an d sw it ch 6-25 exiting 7- 10 logging i nto 7-10 mapping on me mber switche s 6-25 overvi ew 7-2,.
Inde x IN- 21 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 ingress po rt scheduling 26-8 IP phone s, detec tion a nd t rus ted se ttin gs 26-13 mappin g tabl es CoS-to-DSCP .
Index IN- 22 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 read-on ly a c cess mode 3-31 read-w rit e a cce ss mode 3-31 reconf irmation i nterval, VMPS, chang ing 14-30 rec.
Inde x IN- 23 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 removi ng source (m onitored ) ports 21-17 specifying mo nitore d ports 21-15 source ports 21-4 transmitted tra ff.
Index IN- 24 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 SNAP 20-1 SNMP acce ssing MIB variab les with 24-4 agen t describe d 24-3 disabling 24-7 communi ty strings config.
Inde x IN- 25 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 source ports 21-4 transmitted tra ffic 21-4 VLAN-based 21-6 spannin g tr ee and na tiv e V LAN s 14-17 Spanning T .
Index IN- 26 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 enab lin g 13-18 default conf igur ati on 11-10 defau lt option al featur e configur ation 13-14 designat ed po rt.
Inde x IN- 27 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 displaying the tim e and date 7-44 overvi ew 7-34 See also NT P system message logging default conf igur ati on 23.
Index IN- 28 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 limiti ng acc ess by server s 24-13 time See NTP and s ystem cloc k time -range co mm and 25-15 time ranges in ACL.
Inde x IN- 29 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 neighbor da tabase 19-2 overvi ew 19-1 resettin g an interface 19-5 status, displaying 19-6 unautho rized port s with 802.
Index IN- 30 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1 config urati on option s 14-6 config uring 14-1 config uring IDs 10 06 to 4094 14-12 creating in config -vlan mode.
Inde x IN- 31 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-14982-01 server mode 15-9 transp arent mo de 15-12 cons iste ncy ch ecks 15-4 default conf igur ati on 15-6 describe d 15-1.
Index IN- 32 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-14982-0 1.
An important point after buying a device Cisco Systems DOC-7814982 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Cisco Systems DOC-7814982 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Cisco Systems DOC-7814982 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cisco Systems DOC-7814982 you will learn all the available features of the product, as well as information on its operation. The information that you get Cisco Systems DOC-7814982 will certainly help you make a decision on the purchase.
If you already are a holder of Cisco Systems DOC-7814982, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cisco Systems DOC-7814982.
However, one of the most important roles played by the user manual is to help in solving problems with Cisco Systems DOC-7814982. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cisco Systems DOC-7814982 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
