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iii Cisco IOS IP Configuration Guide CONTENTS About Cisco IOS Software Documentation xxix Documentation Objectives xxix Audience xxix Documentation Organization xxix Documentation Modules xxix Master .
Contents iv Cisco IOS IP Configuration Guide Determining a Routing Process IPC-2 Interior and Exterior Gateway Protocols IPC-2 Interior Gateway Protocols IPC-3 Exterior Gateway Protocols IPC-3 Multipl.
Contents v Cisco IOS IP Configuration Guide Suppressing Forward and Reverse Re cord Options IPC-26 Specifying the NHRP Responder Address IPC-26 Changing the Time Period NBMA Addresses Are Advertised a.
Contents vi Cisco IOS IP Configuration Guide Displaying System and Network Statistics IPC-48 Monitoring and Maintaining NHRP IPC-49 IP Addressing Example s IPC-49 Creating a Network from Separated Su .
Contents vii Cisco IOS IP Configuration Guide Configuring the Address Lease Time IP C-71 Configuring Manual Bindin gs IPC-71 Configuring a DHCP Server Boot File IP C-73 Configuring the Number of Ping .
Contents viii Cisco IOS IP Configuration Guide Applying Time Ranges to Access Lists IP C-97 Including Comments About Entries in Access Lists IPC-98 Applying Access Lists IPC-98 Controlling Access to a.
Contents ix Cisco IOS IP Configuration Guide Enabling CEF IPC-1 16 Enabling NetFlow Switching IPC-117 Enabling IP Mu lticast Routing IPC-1 17 Configuring the Router as a Forwarding Agent IPC-1 18 Moni.
Contents x Cisco IOS IP Configuration Guide Port-Bound Servers IPC-136 Client-Assigned Load Balancing IPC-136 Content Flow Monitor Support IPC-136 Sticky Connections IPC-1 36 Maximum Connections IPC-1.
Contents xi Cisco IOS IP Configuration Guide Verifying Server Failure Detection IPC-149 Troubleshooting IOS SLB IPC-150 Monitoring and Maintaining IOS SLB IPC-1 51 Configuration Examples IPC-1 51 IOS .
Contents xii Cisco IOS IP Configuration Guide Enabling HSRP IPC-171 Configuring HSRP Group Attributes IPC-171 Enabling HA Redundan cy for a Physical Network IPC-172 Enabling HA Redundan cy for a Virtu.
Contents xiii Cisco IOS IP Configuration Guide Restrictions to RIP Route Su mmarization IPC-205 Configuring Route Summarization on an Interface IPC-20 5 Verifying IP Route Summarization IP C-205 Disab.
Contents xiv Cisco IOS IP Configuration Guide Enabling OSPF IP C-225 Configuring OSPF Interface Parameters IPC-225 Configuring OSPF over Different Phys ical Networks IPC-226 Configuring Your OSPF Netw.
Contents xv Cisco IOS IP Configuration Guide Basic OSPF Configuration Example fo r Internal Router, ABR, and ASBRs IPC-246 Complex Internal Router, ABR, and ASBRs Example IPC-246 Complex OSPF Configur.
Contents xvi Cisco IOS IP Configuration Guide Configuring Integrated IS-IS IPC-277 IS-IS Configuration Task List IPC-277 Enabling IS-IS and Assigning Are as IPC-277 Enabling IP Routing for an Area on .
Contents xvii Cisco IOS IP Configuration Guide How BGP Selects Paths IPC-294 BGP Multipath Support IPC-295 Basic BGP Configuration Task List IPC-295 Advanced BGP Configuration Task List IPC-296 Config.
Contents xviii Cisco IOS IP Configuration Guide BGP Conditional Adve rtisem ent Configuration Task List IPC-315 Conditional Advertisement of a Set of Routes IPC-31 5 Verifying BGP Conditional Advertis.
Contents xix Cisco IOS IP Configuration Guide Inbound Soft Reset Using Stored Information Example IPC-339 BGP Synchronization Examples IPC-340 BGP Path Filtering b y Neighbor Examples IP C-340 BGP Agg.
Contents xx Cisco IOS IP Configuration Guide Specifying a Default Network IPC-36 5 Understanding Gate way of Last Resort IPC-366 Changing the Max imum Number of Paths IPC-366 Configuring Multi-Interfa.
Contents xxi Cisco IOS IP Configuration Guide Default Passive Inte rface Example IPC-393 Policy Routing Example IPC-393 Key Management Examples IPC-394 IP MULTICAST Configuring IP Multicast Routing IP.
Contents xxii Cisco IOS IP Configuration Guide Restrictions IPC-412 Changing the IGMP Qu ery Timeout IPC-413 Changing the Max imum Query Response Time IPC-413 Configuring the Router as a Statically Co.
Contents xxiii Cisco IOS IP Configuration Guide Controlling the Trans mission Rate to a Multicast Group IPC-430 Configuring RTP Header Compression IPC-43 0 Enabling RTP Header Compression on a Serial .
Contents xxiv Cisco IOS IP Configuration Guide Express RTP Header Compression with Fram e Relay Encapsulation Example IPC-453 IP Multicast over ATM Poin t-to-Multipoint VC Example IPC-454 Administrati.
Contents xxv Cisco IOS IP Configuration Guide DF Election IPC-473 Bidirectional Group Tree Building IPC-474 Packet Forwarding IPC-474 Bidir-PIM Configuration Task List IPC-474 Prerequisites IPC-474 Co.
Contents xxvi Cisco IOS IP Configuration Guide Enabling PGM Host IPC-495 Enabling PGM Host with a Virtual Host Interface IPC-496 Enabling PGM Host with a Physical Interface IPC-496 Verifying PG M Host.
Contents xxvii Cisco IOS IP Configuration Guide Integrated UDLR Tunnel, IGMP UDLR, and IGMP Proxy Example IPC-518 Using IP Multicast Tools IPC-521 Multicast Routing Monitor Overview IPC-521 Benefits I.
Contents xxviii Cisco IOS IP Configuration Guide Monitoring and Maintaining DVMRP IPC-545 DVMRP Configuration Examples IPC-545 DVMRP Interoperability Example IPC-545 DVMRP Tunnel Ex ample IPC-545 INDE.
xxix Cisco IOS IP Configuration Guide About Cisco IOS Software Documentation This chapte r discusses th e objecti ves, audience , org anization, and co n v entions of Cisco I OS software documentation . It also pro vides sources for obtaini ng documentation from Ci sco Systems.
About Cisco IOS Software Documentation Documentation Or ganization xxx Cisco IOS IP Configuration Guid e Figure 1 sho ws the Cisco IOS softwar e documentation modules.
About Cisco IOS Software Documen tation Documentation Organization xxxi Cisco IOS IP Configuration Guide Cisco IOS Voice, Video, and Fax Configuration Guide Cisco IOS Voice, Video, and Fax Command Ref.
About Cisco IOS Software Documentation Documentation Or ganization xxxii Cisco IOS IP Configuration Guid e Master Indexes T wo master inde xes pro vide inde xing information f or the Cisco IOS softw are documentati on set: an inde x for the co nfigu ration guides and an index for the command references.
About Cisco IOS Software Documen tation New and Changed Information xxxiii Cisco IOS IP Configuration Guide New and Changed Information The follo wing is ne w or changed information since the last rel.
About Cisco IOS Software Documentation Document Conv entions xxxiv Cisco IOS IP Configuration Guid e Command syntax descript ions use the follo wing con ventions: Nested sets of squa re brackets or braces indicate optional or re quired choices within optional or required elements.
About Cisco IOS Software Documen tation Obtaining Documentation xxxv Cisco IOS IP Configuration Guide Obtaining Documentation The follo wing sections p rovide sources for o btaining documentation from Cisco Sy stems. World Wide Web The most current Cisco documentation is a v ailable on the W orld W ide W eb at the follo wing website: http://www .
About Cisco IOS Software Documentation Obtaining Technica l Assistance xxxvi Cisco IOS IP Configuration Guid e T o submit your comments by mail, use th e response card behind the fro nt cov er of your docu ment, or write to the follo wing ad dress: Cisco Systems, Inc.
About Cisco IOS Software Documen tation Obtaining Te chnical Assistance xxxvii Cisco IOS IP Configuration Guide P3 and P4 le v el problems are defi ned as follo ws: • P3—Y our network performan ce is degraded. Network functio nality is noticeably im paired, but most b usines s operation s continu e.
About Cisco IOS Software Documentation Obtaining Technica l Assistance xxxviii Cisco IOS IP Configuration Guid e.
xxxix Cisco IOS IP Configuration Guide Using Cisco IOS Software This chapter pr ovides h elpful ti ps for understand ing and conf igur i ng Cisco IOS softw are using the command-line interface (CLI ).
Using Cisco IOS Software Getting Help xl Cisco IOS IP Configuration Guid e T able 1 describes how to access and exit va rious common comman d modes of the Cisco IOS softw are.
Using Cisco IOS Software Getting Help xli Cisco IOS IP Configuration Guide Example: How to Find Command Options This section pr ovides an example of how to displa y syntax for a c ommand. Th e syntax can consist of optional or req uired ke yw ords and ar guments.
Using Cisco IOS Software Getting Help xlii Cisco IOS IP Configuration Guid e Router(config-if)# ? Interface configuration commands: . . . ip Interface Internet Protocol config commands keepalive Enabl.
Using Cisco IOS Software Using the no and default Forms o f Commands xliii Cisco IOS IP Configuration Guide Using the no and default Forms of Commands Almost e very conf iguration command h as a no form. In general, use the no for m to disable a function.
Using Cisco IOS Software Saving Configuration Change s xliv Cisco IOS IP Configuration Guid e hav e v ariables set to certain de fault values. In these cases, the default form of the command enables the command and sets the variables to thei r def ault v alues.
Using Cisco IOS Software Identifying Supported Pla tforms xlv Cisco IOS IP Configuration Guide Identifying Supported Platforms Cisco IOS soft ware is pack aged in feat ure sets co nsisting of so ftware images that supp ort specif ic platforms.
Using Cisco IOS Software Identifying Supported Platforms xlvi Cisco IOS IP Configuration Guid e.
IPC-1 Cisco IOS IP Configuration Guide IP Overview The Internet Protocol (IP) is a pack et-based protocol used to exchange data o ve r computer networks.
IP Overvi ew IP Routing Protocols IPC-2 Cisco IOS IP Configuration Guide Server load balancing allo ws a network ad ministrator to def ine a virt ual server to represen t a group of real servers. F or more informati on on this feature, see the “Configurin g Serv er Load Balancing” chapter .
IP Overview IP Routing Protocols IPC-3 Cisco IOS IP Configuration Guid e Note Many routin g protocol specif ications refer to routers as gate ways , so the word gateway often appears as part of routing proto col names.
IP Overvi ew IP Multicast IPC-4 Cisco IOS IP Configuration Guide For e xample, RIP uses a hop-count metric and IGRP us es a f i ve-el ement vector o f metric information.
IP A ddressing and S ervices.
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IPC-7 Cisco IOS IP Configuration Guide Configuring IP Addressing This chapter describes how to conf igure IP addressi ng. For a complete description of the IP addressi ng commands in this chapter , refer to the “IP Addressing Commands” chapter of the Cisco IOS IP Command Refer ence, V olume 1 of 3: Addr essing and Services publicat ion.
Configuri ng IP Addressi ng Assigning IP Addresses to Network Inter faces IPC-8 Cisco IOS IP Configuration Guide The of fi cial description of IP addr esses is found in RFC 1166, Internet Number s . T o recei ve an assigned netw ork number , cont act your Internet service pro vider (ISP).
Configuring IP Addr essing Assigning IP Addresses to Network Interfaces IPC-9 Cisco IOS IP Configuration Guid e Assigning Multiple IP Addresses to Network Interfaces Cisco IOS software supports multipl e IP addresse s per interface. Y ou can specify an unlimite d number of secondary addresses.
Configuri ng IP Addressi ng Assigning IP Addresses to Network Inter faces IPC-10 Cisco IOS IP Configuration Guide Y o u can use t he all 0s and all 1s subnet (13 1.108.255.0), e v en though it is d iscouraged. Conf iguring interfaces for the all 1s subnet is expl icitly allo we d.
Configuring IP Addr essing Assigning IP Addresses to Network Interfaces IPC-11 Cisco IOS IP Configuration Guid e Figure 2 No IP Cl assless Routing T o prevent the Cisco IOS software f rom forwarding p.
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-12 Cisco IOS IP Configuration Guide Note Using an unnumbered s erial line between different major networks requires special care.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-13 Cisco IOS IP Configuration Guid e The software uses three forms of address resolution: Address Resol ution Protocol (ARP), proxy ARP , and Probe (simil ar to ARP). The s oftware a lso uses the Re verse A ddress Reso lution Protocol (RARP).
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-14 Cisco IOS IP Configuration Guide Use the follo wing command in interface conf iguration mode to set the length of time an ARP.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-15 Cisco IOS IP Configuration Guid e Configuring Loca l-Area Mobility Local-area mobility pro vides the ability to relocat e IP hosts withi n a limited area without reassig ning host IP addresses and w ithout changes to the host softw are.
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-16 Cisco IOS IP Configuration Guide T o keep track of domain names, IP has def ined the concept of a name server , whose job is to hold a cache (or database) of names mapped to IP addresses.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-17 Cisco IOS IP Configuration Guid e Specifying a Name Server T o specify one or more host s (up to six) that can funct ion as a .
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-18 Cisco IOS IP Configuration Guide Configuring HP Probe Proxy Name Requests HP Probe Proxy supp ort allo ws the Cisco I OS softwa re to respo nd to HP Probe Proxy name requests.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-19 Cisco IOS IP Configuration Guid e Figure 3 illustrates four routers connected to an NBMA ne twork. W ithin the network are A TM or SMDS switches necessary for the routers to communicate with each other .
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-20 Cisco IOS IP Configuration Guide Each Nex t Hop Server serv es a set of destinat ion ho sts, which might be direct ly connected to the NBMA network. Ne xt Hop Serv ers cooperat iv ely resolv e the NBMA ne xt hop addresses w ithin their NBMA network.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-21 Cisco IOS IP Configuration Guid e Enabling NHRP on an Interface T o enable NHRP for an interface on a router , us e the following co mmand in interface conf iguration mode.
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-22 Cisco IOS IP Configuration Guide Configuring NHRP Authentication Config uring an authenticatio n string ensures that only routers conf igured with the same string can communicate using NHRP .
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-23 Cisco IOS IP Configuration Guid e Triggering NHRP on a per-Destination Basis By default, when the softw are attempts to send a data pack et to a destin ation for whi ch it has determined that NHRP can be used, it sends an NHRP request for that destination.
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-24 Cisco IOS IP Configuration Guide NHRP Configuration Task List T o conf igure the NHRP triggering and teardo wn of SVCs based on traf fic rate, perform the tasks described in the follo wing sections.
Configuring IP Addr essing Configuring Address Reso lution Methods IPC-25 Cisco IOS IP Configuration Guid e If your Cisco hardw are has a V irt ual Inte rface Processor , v ersion 2 adapter , you must perform the follo wing task to change the sampling ti me.
Configuri ng IP Addressi ng Configuring Address Resolution Meth ods IPC-26 Cisco IOS IP Configuration Guide Suppressing Forward and Reverse Record Options T o dynamically detect l ink layer f iltering.
Configuring IP Addr essing Enabling IP Routing IPC-27 Cisco IOS IP Configuration Guid e Configuring a GRE Tunnel for Multipoint Operation Y ou can enable a generic routing en capsulation (GRE) tunnel to operate in multipoint f ashion. A tunnel network of multipoint tunnel interf aces can be thoug ht of as an NBMA network.
Configuri ng IP Addressi ng Enabling IP Routing IPC-28 Cisco IOS IP Configuration Guide Routing Assistance When IP Routing Is Disabled The Cisco IOS software provides t hree methods by which the router can lear n about routes t o other networks when IP routi ng is disabled and the de vice is acting as an IP host.
Configuring IP Addr essing Enabling IP Routing IPC-29 Cisco IOS IP Configuration Guid e ICMP Router Di scovery Protocol The Cisco IOS software pro vides a third method, called r outer discovery , by which the router dynamically learns about routes t o other networks using th e ICMP Router Disco very Protocol IRDP).
Configuri ng IP Addressi ng Enabling IP Bridging IPC-30 Cisco IOS IP Configuration Guide The Cisco IOS softw are can proxy-adv ertise other machin es that use IRDP; ho we ver , this practice is not recommended because it is possibl e to advertise nonexistent machin es or machines that are down.
Configuring IP Addr essing Configuring Broadcast Pa cket Handling IPC-31 Cisco IOS IP Configuration Guid e Configuring Broadcast Packet Handling A br oadcast is a data packet destined for all hosts on a parti cular physical network. N etwork hosts recognize broadcasts by special addresses.
Configuri ng IP Addressi ng Configuring Broa dcast Packet Handling IPC-32 Cisco IOS IP Configuration Guide T o enable forwarding of IP directed broadcast s, use the follo wing command in interface con.
Configuring IP Addr essing Configuring Broadcast Pa cket Handling IPC-33 Cisco IOS IP Configuration Guid e Establishing an IP Broadcast Address The Cisco IOS software supports IP broadcasts on both LANs and W ANs. There are se veral w ays to indicate an IP broadcast address.
Configuri ng IP Addressi ng Configuring Broa dcast Packet Handling IPC-34 Cisco IOS IP Configuration Guide In order to be considered for f looding, packets must meet the follo wing criteria . (Note that these are the same conditions used to consider p acket forwardi ng using IP helper addresses.
Configuring IP Addr essing Configuring Network Address Translation IPC-35 Cisco IOS IP Configuration Guid e Configuring Network Address Translation T wo key problems facing t he Internet are depletion of IP address space and scaling in routing.
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-36 Cisco IOS IP Configuration Guide A router conf igured with N A T must not advertise the l ocal networks to th e outside. Ho we v er , rout ing information th at N A T receiv es from the outside can be advertised i n the stub domain as u sual.
Configuring IP Addr essing Configuring Network Address Translation IPC-37 Cisco IOS IP Configuration Guid e Translating Inside Source Addresses Y ou can translate your own IP addresses into globa lly unique IP ad dresses when communicatin g outside of your network .
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-38 Cisco IOS IP Configuration Guide Host 1.1.1.1 recei v es the packet and cont inues the con versation.
Configuring IP Addr essing Configuring Network Address Translation IPC-39 Cisco IOS IP Configuration Guid e Packets that enter the router th rou gh the inside interface and p a ckets sourced from the router are checked against the access list for possible NA T candi dates.
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-40 Cisco IOS IP Configuration Guide Figure 5 NA T Over loading I nside Global Addresses The router performs the follo wing process in o ver loading inside global ad dresses, as shown in Figur e 5 .
Configuring IP Addr essing Configuring Network Address Translation IPC-41 Cisco IOS IP Configuration Guid e Note The access list must permit only thos e addresses that a re to be transl ated. (Remember that there is an implicit “deny all” at the end of each access list.
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-42 Cisco IOS IP Configuration Guide Figure 6 NA T T ranslating Over lapping Addresses The router performs the fo llowing process when transl ating ov erlapping addresses: 1. The user at host 1.
Configuring IP Addr essing Configuring Network Address Translation IPC-43 Cisco IOS IP Configuration Guid e Configuring Static Translation T o conf igure static SA address translation, use the follo w.
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-44 Cisco IOS IP Configuration Guide addresses from a rotary pool. Allocatio n is done on a round-robin basis, an d only when a ne w connection is opened fro m the outside to th e inside.
Configuring IP Addr essing Configuring Network Address Translation IPC-45 Cisco IOS IP Configuration Guid e Note The access list must permit only thos e addresses that a re to be transl ated. (Remember that there is an implicit “deny all” at the end of each access list.
Configuri ng IP Addressi ng Configuring Network Address Tr anslation IPC-46 Cisco IOS IP Configuration Guide Monitoring and Maintaining NAT By default, dynamic address translati ons will time ou t from the N A T translation table at so me point.
Configuring IP Addr essing Monitoring and Maintaining IP Ad dressing IPC-47 Cisco IOS IP Configuration Guid e T o specify a port other than the default port, use the follo wing command in global conf .
Configuri ng IP Addressi ng Monitoring and Main ta ining IP Addressing IPC-48 Cisco IOS IP Configuration Guide T o specify the format in which netmasks appear for the cu rrent session, use the follo w.
Configuring IP Addr essing IP Addressing Examples IPC-49 Cisco IOS IP Configuration Guid e See the “ ping Command Example ” section at the end of this ch apter for an example of pinging.
Configuri ng IP Addressi ng IP Addressing Examples IPC-50 Cisco IOS IP Configuration Guide • Changing the Rate for T riggering SVCs Example • Applying NHRP Rates to Specif ic Destination s Example.
Configuring IP Addr essing IP Addressing Examples IPC-51 Cisco IOS IP Configuration Guid e ip address 145.22.4.67 255.255.255.0 interface serial 1 ip unnumbered ethernet 0 IP Domains Example The follo wing e xample establishes a domain li st with se ve ral alternate domain names: ip domain list csi.
Configuri ng IP Addressi ng IP Addressing Examples IPC-52 Cisco IOS IP Configuration Guide Figure 9 T wo Logical NBMA N etwor ks over One Physical NBMA Networ k The physical conf iguration of the f i ve rou ters in Figure 9 might actually b e that sho wn in Figure 10 .
Configuring IP Addr essing IP Addressing Examples IPC-53 Cisco IOS IP Configuration Guid e Figure 1 0 Physical Configuration of a Sample NBMA Networ k Refer a gain to Figure 9 .
Configuri ng IP Addressi ng IP Addressing Examples IPC-54 Cisco IOS IP Configuration Guide The signif icant portions of the conf igurations for routers A, B, and C follo w: Router A Configuration interface ATM0/0 ip address 10.1.0.1 255.255.0.0 ip nhrp network-id 1 map-group a atm nsap-address 11.
Configuring IP Addr essing IP Addressing Examples IPC-55 Cisco IOS IP Configuration Guid e map-list a ip 10.1.0.1 atm-nsap 11.1111.11.111111.1111.1111.1111.1111.1111.1111.11 map-list b ip 10.2.0.2 atm-nsap 22.2222.22.222222.2222.2222.2222.2222.2222.2222.
Configuri ng IP Addressi ng IP Addressing Examples IPC-56 Cisco IOS IP Configuration Guide interface Fddi1/0/0 ip address 10.2.1.55 255.255.255.0 no ip directed-broadcast no ip mroute-cache no keepalive ! router ospf 1 passive-interface Fddi1/0/0 network 10.
Configuring IP Addr essing IP Addressing Examples IPC-57 Cisco IOS IP Configuration Guid e Router C Configuration ip cef ip cef accounting non-recursive ! interface Loopback0 ip address 140.
Configuri ng IP Addressi ng IP Addressing Examples IPC-58 Cisco IOS IP Configuration Guide NHRP on a Multipoint Tunnel Example W ith multipoint tunnels, a single tunnel interface may be connected to multiple neig hboring routers. Unlike point-t o-point tunnels, a t unnel destination need not be co nf igured.
Configuring IP Addr essing IP Addressing Examples IPC-59 Cisco IOS IP Configuration Guid e ip nhrp network-id 1 ip nhrp nhs 11.0.0.4 tunnel source ethernet 0 tunnel mode gre multipoint tunnel key 1 interface ethernet 0 ip address 10.0.0.3 255.0.0.0 Router D Configuration interface tunnel 0 no ip redirects ip address 11.
Configuri ng IP Addressi ng IP Addressing Examples IPC-60 Cisco IOS IP Configuration Guide A directed broadcast address includes the networ k or subnet fi elds. For e xample, if the netw ork address is 128.1.0.0, the add ress 128.1.255.255 indi cates all hosts on netw ork 128.
Configuring IP Addr essing IP Addressing Examples IPC-61 Cisco IOS IP Configuration Guid e Figur e 13 IP Helper Ad dr esses The follo wing e xample sho ws the conf iguration: ip forward-protocol udp ! interface ethernet 1 ip helper-address 10.44.23.7 interface ethernet 2 ip helper-address 192.
Configuri ng IP Addressi ng IP Addressing Examples IPC-62 Cisco IOS IP Configuration Guide ip nat inside source route-map provider1-map pool provider1-space ip nat inside source route-map provider2-ma.
Configuring IP Addr essing IP Addressing Examples IPC-63 Cisco IOS IP Configuration Guid e TCP Load Distribution Example In the follo wing e xample, the goal is to def ine a virtual address, connections to which are dist ribut ed among a set of real hosts.
Configuri ng IP Addressi ng IP Addressing Examples IPC-64 Cisco IOS IP Configuration Guide.
IPC-65 Cisco IOS IP Configuration Guide Configuring DHCP This chapter describes ho w to configure Dyn amic Host Conf iguration Protocol (DHCP). F or a complete description of the DHCP commands l isted.
Configuri ng DHCP DHCP Server Overview IPC-66 Cisco IOS IP Configuration Guide Figure 14 sho w s the basic steps that occur when a DHC P client requests an IP address from a DHCP Server . The client, Host A, sends a DHCPDISC O VER broadcast message to locate a Cisco IOS DHCP Server .
Configuring DHCP DHCP Client Overview IPC-67 Cisco IOS IP Configuration Guid e Using automatic IP address assignment at eac h re mote site substantially reduces Int ernet access costs. Static IP addresses are considerably more expensi v e to purchase than are aut omatically allocated IP addresses.
Configuri ng DHCP DHCP Configuration Task List IPC-68 Cisco IOS IP Configuration Guide DHCP Configuration Task List The DHCP Server database is organized as a tree. Th e root of the t ree is the address pool for n atural networks, branches are subnetw ork address pools , and lea ves are manual bin dings to clients.
Configuring DHCP DHCP Configura tion Task List IPC-69 Cisco IOS IP Configuration Guid e Configuring a DHCP Database Agent or Disabling DHCP Conflict Logging A DHCP database agent is any host—for example, an FTP , TFTP , or rcp serv er—that stores the DH CP bindings database.
Configuri ng DHCP DHCP Configuration Task List IPC-70 Cisco IOS IP Configuration Guide Configuring the DHCP Addr ess Pool Subnet and Mask T o conf igure a subnet and mask for the ne wly created DHCP a.
Configuring DHCP DHCP Configura tion Task List IPC-71 Cisco IOS IP Configuration Guid e Configuring the NetBIOS Node Type for the Client The NetBIOS node type for Microsoft DHCP clients can be one of four setti ngs: broadcast, peer -to-peer , mixed, or h ybrid.
Configuri ng DHCP DHCP Configuration Task List IPC-72 Cisco IOS IP Configuration Guide Manual bindings are IP addresses that hav e been manually mapped to the MA C addresses of hosts that are found in the DHCP database. Manual bindings are stored in NVRAM on the DHCP Serv er .
Configuring DHCP DHCP Configura tion Task List IPC-73 Cisco IOS IP Configuration Guid e Configuring a DHCP Server Boot File The boot f ile is used to store the boot image for the client. The boot image is generally the operating system the client uses to load.
Configuri ng DHCP DHCP Configuration Task List IPC-74 Cisco IOS IP Configuration Guide Configuring DHCP Server Options Import and Autoconfiguration The Cisco IOS DHCP server can dynamically conf ig ure options such as the DNS and WINS addresses to respond to DHCP requests from local clients behind the customer premises equipment (CPE).
Configuring DHCP Monitoring and Maintaining th e DHCP Server IPC-75 Cisco IOS IP Configuration Guid e Configuring the Relay Agent Information Option in BOOTREPLY Messages T o conf igure the DH CP Serv.
Configuri ng DHCP Configuration Examples IPC-76 Cisco IOS IP Configuration Guide T o enable DHCP Server deb ugging, use the follo wing command in privile ged EXEC mode: T o display DHCP Ser ver inform.
Configuring DHCP Configuration Example s IPC-77 Cisco IOS IP Configuration Guid e DHCP Database Agent Configuration Example The follo wing e xample stores bindi ngs on host 172.16.4.253. The f ile transfer protocol i s FTP . The server should w ait 2 minutes (120 seconds) before writing dat abase changes.
Configuri ng DHCP Configuration Examples IPC-78 Cisco IOS IP Configuration Guide Manual Bindings Configuration Example The follo wing exampl e creates a manual binding f or a client named Mars.cisco.com. The MA C address of the client is 02 c7.f800.0422 and the IP ad dress of the client is 172.
Configuring DHCP Configuration Example s IPC-79 Cisco IOS IP Configuration Guid e DHCP Server Options Import and Autoconfiguration Example The follo wing e xample sho ws a remote an d central server con figured t o support DHCP options imp ort and autoconfiguration.
Configuri ng DHCP Configuration Examples IPC-80 Cisco IOS IP Configuration Guide speed auto.
IPC-81 Cisco IOS IP Configuration Guide Configuring IP Services This chapter describe s how to conf igure optiona l IP services. For a complete descript ion of the IP services commands in this chap ter , refer to the “I P Services Commands” chapter of the Cisco IOS IP Command Refer ence, V olume 1 of 3: Addr essing and Services .
Configuring IP Services Managing IP Connection s IPC-82 Cisco IOS IP Configuration Guide T o manage v arious aspects of IP co nnections, perf orm the op tional tasks descri bed in the follo wing secti.
Configuring IP Services Managing IP Connections IPC-83 Cisco IOS IP Configuration Guid e T o enable the send ing of ICMP redirect messages if t his feature was disabled, use t he follo wing command in.
Configuring IP Services Managing IP Connection s IPC-84 Cisco IOS IP Configuration Guide because the 512-byte router is unable to forw ard it. Al l packets larger than 512 bytes are dropped in this case.
Configuring IP Services Managing IP Connections IPC-85 Cisco IOS IP Configuration Guid e IP provid es a pro vision kno wn as sour ce r outing that allo ws the source IP host to specify a route th rough the IP network. Source rou ting is specif ied as an opti on in the IP header .
Configuring IP Services Managing IP Connection s IPC-86 Cisco IOS IP Configuration Guide T o conf igure and maintain the DRP Server Agent, pe rform the tasks described in th e follo wing section s. The task in th e first section is required ; the tasks in th e remaining sec tions are optio nal.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-87 Cisco IOS IP Configuration Guid e When config uring your ke y chains and k e ys, be aw are of the follo wing guidelin es: • The key chain conf igured for the DRP Server Agent in Step 1 must mat ch the ke y chain in Step 2.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-88 Cisco IOS IP Configuration Guide 2. Apply the access list to interf aces or terminal lines. These and other tasks are descri bed in this section and are l abeled as required or optio nal.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-89 Cisco IOS IP Configuration Guid e T o create a standard access list, use the foll owing commands in global conf iguration mode: The Cisco IOS software can pro vide logging messages about packets permitted or denied by a standard IP access list.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-90 Cisco IOS IP Configuration Guide T o create an extended access list, use the fo llo wing commands in glob al configuration mode: Note The fragments keyw ord is descri bed in the Speci fying IP Extended Access Lists with Fragment Control section.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-91 Cisco IOS IP Configuration Guid e Note In a standard access list, if you omit the mask from an associat ed IP host address access list specificat ion, 0.0.0.0 is assumed to be the mask.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-92 Cisco IOS IP Configuration Guide T o create an extended access l ist, use the follo wing commands beginning in global conf iguratio n mode: Note Autonomous switching is not used when you ha ve extended access lists.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-93 Cisco IOS IP Configuration Guid e Note When making the standard and extended access list, remember that, by default, the end of the access list contains an implicit deny statemen t for e ver ything if it did not find a match befo re reaching the end.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-94 Cisco IOS IP Configuration Guide The behavior of access-list entries rega rding the presence or absence of the fragments keyword .
Configuring IP Services Filtering IP Packets Using Access Lists IPC-95 Cisco IOS IP Configuration Guid e The fragments ke yword can be applied to dynamic access list s also. Packet fragments of IP datagrams are considered in di vidual packets and each counts indi vidually as a packet in access list accounting and acce ss list violation co unts.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-96 Cisco IOS IP Configuration Guide Enabling Turbo Access Control Lists The T urbo A ccess Control Lists (T urbo ACL) featur e processes access lists more expediently than con v entional access l ists.
Configuring IP Services Filtering IP Packets Using Access Lists IPC-97 Cisco IOS IP Configuration Guid e Verifying Turbo ACLs Use the show access-list compiled EXEC comma nd to verify that the T urbo A C L feature has been successfully configured on your ro uter .
Configuring IP Services Filtering IP Packets Using Access Lists IPC-98 Cisco IOS IP Configuration Guide time-range command is described in the “Performing Basic System Man agement” chapter of the Cisco IOS Conf igur ation Fund amentals Conf igur ation Guide .
Configuring IP Services Filtering IP Packets Using Access Lists IPC-99 Cisco IOS IP Configuration Guid e Controlling Access to a Line or Interface After you create an access list, you can apply it to on e or more interfaces. Access lists can be applied on either outbound or inbound interfaces.
Configuring IP Services Configuring the Hot Standby Router Proto col IPC-100 Cisco IOS IP Configuration Guide Configuring the Hot Standby Router Protocol The Hot Standby Router Protocol (HSRP) provide.
Configuring IP Services Configuring the Hot St andby Router Protocol IPC-101 Cisco IOS IP Configuration Guid e Note The Cisco 1000 series, Cisco 2500 series, Cisco 3000 series, Cisco 400 0 series, and Cisco 4500 routers that use Lance Ethernet hardw are do not support multiple Hot Standb y groups on a single Ethernet interface.
Configuring IP Services Configuring the Hot Standby Router Proto col IPC-102 Cisco IOS IP Configuration Guide Configuring HSRP Group Attributes T o configure other Ho t Standby g roup attrib utes that.
Configuring IP Services Configuring the Hot St andby Router Protocol IPC-103 Cisco IOS IP Configuration Guid e For e xamples of this feature, see th e section “ HSRP MA C Refresh Interval Examples ” at the end of this chapter . Enabling HSRP MIB Traps W ith Cisco IOS Release 12.
Configuring IP Services Configuring the Hot Standby Router Proto col IPC-104 Cisco IOS IP Configuration Guide Each VPN is associated with one or more VPN routing/ forwarding (VRF) instances.
Configuring IP Services Configuring the Hot St andby Router Protocol IPC-105 Cisco IOS IP Configuration Guid e Verifying HSRP Support for MPLS VPNs The follo wing e xample sho ws how to use show EXEC .
Configuring IP Services Configuring the Hot Standby Router Proto col IPC-106 Cisco IOS IP Configuration Guide Figur e 1 8 N etwor k Supporting the HSR P ICMP Redir ection Filt er If the host want s to send a packet t o another host on Net D, then it f irst sends it to its def ault gate way , the virtual IP address of HS RP group 1.
Configuring IP Services Configuring the Hot St andby Router Protocol IPC-107 Cisco IOS IP Configuration Guid e Redirects to Passive HSRP Routers Redirects to passi ve HSRP routers are not permitted. Red undancy may be lost if hosts learn the real IP addresses of HSRP routers.
Configuring IP Services Configuring IP Acco unting IPC-108 Cisco IOS IP Configuration Guide The IP source address of an ICMP pa cket must match the gate way ad dre ss used by the host in the pac ket that triggered the ICMP packet, ot herwise the host will reject the ICMP redirect packet.
Configuring IP Services Configuring IP Accounting IPC-109 Cisco IOS IP Configuration Guid e T o configure other IP account ing functions, use the follo wing commands in global confi guration mode, as .
Configuring IP Services Configuring TCP Performance Par ameters IPC-110 Cisco IOS IP Configuration Guide T o remo ve IP accounting based on the MA C address from the interface, use the no ip accounting mac-address command.
Configuring IP Services Configuring TCP Performance Parame ters IPC-111 Cisco IOS IP Configuration Guid e Compressing TCP Packet Headers Y ou can compress the headers of your TCP/IP packets in order to reduce thei r size, thereby increasing performance.
Configuring IP Services Configuring TCP Performance Par ameters IPC-112 Cisco IOS IP Configuration Guide The CEF and fast-switchi ng aspects of the Express TC P Header Compression feature are related .
Configuring IP Services Configuring TCP Performance Parame ters IPC-113 Cisco IOS IP Configuration Guid e T o enable Path MTU Disco very , use the following command in global conf iguration mode: Customers using TCP connecti ons to mov e b ulk data between systems on distinct subnets w ould benefit most b y enabling this feature.
Configuring IP Services Configuring TCP Performance Par ameters IPC-114 Cisco IOS IP Configuration Guide Enabling TCP Time Stamp The TCP time-stamp option pro vides better TCP roun d-trip time measurements.
Configuring IP Services Configuring IP over WANs IPC-115 Cisco IOS IP Configuration Guid e Setting the TCP Outgoing Queue Size The default TCP out going queue size per connection is 5 se gments if the con nection has a TTY associated with it (like a T elnet co nnection).
Configuring IP Services Configuring the MultiNode Load Balancing Forw arding Agent IPC-116 Cisco IOS IP Configuration Guide Config ure the Forw arding Agent only if you are in stalling the MNLD Feature Set for LocalDirector .
Configuring IP Services Configuring the MultiNo de Lo ad Balancing Forwarding Agent IPC-117 Cisco IOS IP Configuration Guid e Enabling NetFlow Switching Y ou must enable NetFlo w switching on all interfaces that will carry ContentFlo w traf fic.
Configuring IP Services Monitoring and Main ta ining the IP Network IPC-118 Cisco IOS IP Configuration Guide See the “Conf iguring IP Multicast Routing ” chapter of this document for more infor mation on ho w to confi gure IP multicast routin g.
Configuring IP Services Monitoring and Maintaining the IP Network IPC-119 Cisco IOS IP Configuration Guid e T o clear caches, tables, and databases, use the following commands in EXEC mode, as needed:.
Configuring IP Services IP Services Configuration Ex amples IPC-120 Cisco IOS IP Configuration Guide Monitoring the MNLB Forwarding Agent T o monitor the status of the Forw arding Agen t, use the foll.
Configuring IP Services IP Services Configuration Examp les IPC-121 Cisco IOS IP Configuration Guid e • T ime Range Applied to an IP Access List Example • Commented IP Access List Entry Examples .
Configuring IP Services IP Services Configuration Ex amples IPC-122 Cisco IOS IP Configuration Guide ip address 128.9.1.2 transmit-interface ethernet 1 ! interface ethernet 1 ip address 128.9.1.2 ! !use show interfaces command to find router1-MAC-address-E1 arp 128.
Configuring IP Services IP Services Configuration Examp les IPC-123 Cisco IOS IP Configuration Guid e Turbo Access Control List Example The follo wing is a T urbo A CL configuration e xample. The access-list compiled global conf igurat ion command output indicates th at T urbo A CL is enabled.
Configuring IP Services IP Services Configuration Ex amples IPC-124 Cisco IOS IP Configuration Guide Extended Access List Examples In the follo wing e xample, the f irst line permits an y incoming TCP connections with destin ation ports greater than 1023.
Configuring IP Services IP Services Configuration Examp les IPC-125 Cisco IOS IP Configuration Guid e IP Extended Access List with Fragment Control Example The fir st statement will mat ch and deny only noninitial fragments destined for host 1.
Configuring IP Services IP Services Configuration Ex amples IPC-126 Cisco IOS IP Configuration Guide deny tcp 171.69.0.0 0.0.255.255 any eq telnet IP Accounting Example The follo wing example enables .
Configuring IP Services IP Services Configuration Examp les IPC-127 Cisco IOS IP Configuration Guid e Router A Configuration hostname RouterA ! interface ethernet 0 ip address 10.0.0.1 255.255.255.0 standby 1 ip 10.0.0.3 standby 1 priority 110 standby 1 preempt standby 2 ip 10.
Configuring IP Services IP Services Configuration Ex amples IPC-128 Cisco IOS IP Configuration Guide HSRP MIB Trap Example The follo wing e xample sho ws ho w to configure HSRP on t wo routers and enable the HSRP MIB trap feature.
Configuring IP Services IP Services Configuration Examp les IPC-129 Cisco IOS IP Configuration Guid e Router PE1 Configuration configure terminal ! ip cef ! ip vrf vrf1 rd 100:1 route-target export 100:1 route-target import 100:1 ! interface ethernet0 ip vrf forwarding vrf1 ip address 10.
Configuring IP Services IP Services Configuration Ex amples IPC-130 Cisco IOS IP Configuration Guide ip address 1.0.0.11 255.0.0.0 standby redirects standby 1 priority 100 standby 1 preempt delay minimum 20 standby 1 ip 1.0.0.1 standby 2 priority 120 standby 2 preempt delay minimum 20 standby 2 ip 1.
Configuring IP Services IP Services Configuration Examp les IPC-131 Cisco IOS IP Configuration Guid e service tcp-small-servers ! hostname FA2 ! ! microcode CIP flash slot0:cip26-5 microcode reload ip subnet-zero no ip domain-lookup ! ip cef distributed ip casa 206.
Configuring IP Services IP Services Configuration Ex amples IPC-132 Cisco IOS IP Configuration Guide mtu 0 1500 mtu 1 1500 mtu 2 1500 mtu 3 1500 multiring all no secure 0 no secure 1 no secure 2 no secure 3 ping-allow 0 ping-allow 1 ping-allow 2 ping-allow 3 ip address 172.
IPC-133 Cisco IOS IP Configuration Guide Configuring Server Load Balancing This chapter describes ho w to configure the IOS Ser ver Load Bal ancing (SLB) feature.
Configuring Server Load Balancing IOS SLB Functions and Capabilities IPC-134 Cisco IOS IP Configuration Guide Security of the real server is pr ovided because its add ress is nev er announced to the external network. Users are familiar onl y with the virtual IP addr ess.
Configuring Server Lo ad Balancing IOS SLB Functions and Capabilities IPC-135 Cisco IOS IP Configuration Guid e • SynGuard • Dynamic Feedback Prot ocol for IOS SLB • Alternate I P Addresse s •.
Configuring Server Load Balancing IOS SLB Functions and Capabilities IPC-136 Cisco IOS IP Configuration Guide Port-Bound Servers When you def ine a virtual ser ver , you must specify the TCP or UDP port handled by th at virtual serv er . Howe ver , if you con f igure NA T on the server farm, you can also configure port -bound servers .
Configuring Server Lo ad Balancing IOS SLB Functions and Capabilities IPC-137 Cisco IOS IP Configuration Guid e Delayed Removal of TCP Connection Context Because of IP packet ordering anomalies, IOS SLB might “see ” the termination of a TCP connection (a fini sh [FIN] or reset [RST]) follo wed by other packets for t he connection.
Configuring Server Load Balancing IOS SLB Functions and Capabilities IPC-138 Cisco IOS IP Configuration Guide Dynamic Feedback Protocol for IOS SLB The IOS SLB Dynamic Feedback Protocol (DFP) is a mec.
Configuring Server Lo ad Balancing Restrictio ns IPC-139 Cisco IOS IP Configuration Guid e The main disadv antage of dispatched mode is that the virtual serv er IP address is not mo dif ied, which means that the real servers must be Layer 2 adjacent with the load balancer or int ervening routers may not be able to route to the chosen real server .
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-140 Cisco IOS IP Configuration Guide • Does not support coordinating serv er load-bal ancing stat istics among dif ferent IOS SLB instances for backup capability . • Supports FTP only in dispatched mode.
Configuring Server Lo ad Balancing IOS SLB Configuration Task List IPC-141 Cisco IOS IP Configuration Guid e • Enabling the Real Serv er for Service (Required) • Specifying a V irtual Serv er (Req.
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-142 Cisco IOS IP Configuration Guide Specifying a Bind ID T o conf igure a bind ID on the server fa rm for use by DFP , use the follo wing command in SLB server farm conf iguration mode: Specifying a Real Server A server farm comprises a number of real serv ers.
Configuring Server Lo ad Balancing IOS SLB Configuration Task List IPC-143 Cisco IOS IP Configuration Guid e Enabling the Real Server for Service T o place the real server into serv ice, use the follo.
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-144 Cisco IOS IP Configuration Guide Adjusting Virtual Server Values T o change the default settings of t he virtual serv er v alu.
Configuring Server Lo ad Balancing IOS SLB Configuration Task List IPC-145 Cisco IOS IP Configuration Guid e Configuring IOS SLB Dynamic Feedback Protocol T o configure IOS SLB DFP , use the follo win.
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-146 Cisco IOS IP Configuration Guide HSRP uses a priority scheme to determine whi ch HS RP-conf igured Layer 3 switch is to be th e default activ e Layer 3 switch.
Configuring Server Lo ad Balancing IOS SLB Configuration Task List IPC-147 Cisco IOS IP Configuration Guid e Step 7 Customize group attributes. See the “Customizing Gro up Attrib utes” section earlier in this ch apter . Step 8 V erify the IOS SLB HSRP co nfigu ration.
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-148 Cisco IOS IP Configuration Guide VS1 TCP 10.10.10.12:23 INSERVICE 2 VS2 TCP 10.10.10.18:23 INSERVICE 2 Router# show ip slb vservers detail VS1, state = INSERVICE, v_index = 10 virtual = 10.
Configuring Server Lo ad Balancing IOS SLB Configuration Task List IPC-149 Cisco IOS IP Configuration Guid e h. Restart the connection, after w aiting no longer than the stick y timeout v alue.
Configuring Server Load Balancing IOS SLB Configuration Task List IPC-150 Cisco IOS IP Configuration Guide Troubleshooting IOS SLB Ta b l e 6 lists questions and answers that can help you tro ubleshoot IOS S LB.
Configuring Server Lo ad Balancing Monitoring and Maintaining IOS SLB IPC-151 Cisco IOS IP Configuration Guid e Monitoring and Maintaining IOS SLB T o obtain and display run-time informat ion about IO.
Configuring Server Load Balancing Configuration Examples IPC-152 Cisco IOS IP Configuration Guide IOS SLB Network Configuration Example This section pro vides a conf igurat ion example based on the network l ayout sho wn in Figure 24 .
Configuring Server Lo ad Balancing Configuration Example s IPC-153 Cisco IOS IP Configuration Guid e ip slb vservers PUBLIC_HTTP Unrestricted Web virtual server virtual 10.0.0.1 tcp www Handle HTTP requests serverfarm PUBLIC Use public Web server farm inservice ip slb vservers RESTRICTED_HTTP Restricted HTTP virtual server virtual 10.
Configuring Server Load Balancing Configuration Examples IPC-154 Cisco IOS IP Configuration Guide • Server 4 has multi ple HTTP serv er applications listenin g on ports 8080, 8081, and 8082. Servers 1 and 2 are load balanced using Switch A, which is pe rforming serv er address translation.
Configuring Server Lo ad Balancing Configuration Example s IPC-155 Cisco IOS IP Configuration Guid e real 10.4.1.1 port 8082 inservice ! ip slb vservers HTTP2 ! Handle HTTP (port 80) requests virtual 128.
Configuring Server Load Balancing Configuration Examples IPC-156 Cisco IOS IP Configuration Guide Figure 26 HSRP Example Networ k T opology The configuration for De vice A is as follo ws: hostname Device A interface GigabitEthernet 41 ip address 1.0.0.
Configuring Server Lo ad Balancing Configuration Example s IPC-157 Cisco IOS IP Configuration Guid e standby 1 timers 5 15 standby 1 name Web-Group interface FastEthernet 41 ip address 2.0.0.1 255.0.0.0 router eigrp 1 network 1.0.0.0 network 2.0.0.0 The standby ip interface configuration command enables HSRP and establishes 1.
Configuring Server Load Balancing Configuration Examples IPC-158 Cisco IOS IP Configuration Guide.
IPC-159 Cisco IOS IP Configuration Guide Configuring Mobile IP This chapter d escribes how to configure Mobile IP . For a comple te descriptio n of the Mobile IP commands in this chapter , refer to the “Mobile IP Co mmands” chapter of the Cisco IOS IP Command Refer ence, V olume 1 of 3: Addr essing and Services .
Configuri ng Mobile IP Mobile IP Overview IPC-160 Cisco IOS IP Configuration Guide IP routing decision s are based on the network pref ix of the IP address to be scal able for the Internet.
Configuring Mobile IP How Mobile IP Works IPC-161 Cisco IOS IP Configuration Guid e Figur e 27 Mobile IP Components and Relationships An MN is a node, for e xample, a PD A, a laptop comp uter , or a data-ready cell ular phone, that can change its point of attachmen t from one network or subnet to another .
Configuri ng Mobile IP How Mobile IP Works IPC-162 Cisco IOS IP Configuration Guide If an MN determines that it is connected to a foreign link, it acquires a care-of address .
Configuring Mobile IP How Mobile IP Works IPC-163 Cisco IOS IP Configuration Guid e Figur e 28 Mobile IP T ypical P ac k et Forw arding Mobile IP Security Mobile IP pro vides the follo wing guidel ines on security between its component s: • Communication between MN and HA must be authenticated.
Configuri ng Mobile IP How Mobile IP Works IPC-164 Cisco IOS IP Configuration Guide This authentication p rocess begi ns when a MN send s the regist ration request. Th e MN adds the time stamp, computes the message digest, and appends the MHAE to the registration request.
Configuring Mobile IP How Mobile IP Works IPC-165 Cisco IOS IP Configuration Guid e Storing SAs on AAA A AAA server can store a lar ge number of SAs and scal e well for f uture SA storage. It can accommodate not only the SAs for MN-HA aut horization, b ut SAs for authorizati on between other Mobile IP components as well.
Configuri ng Mobile IP Prerequisites IPC-166 Cisco IOS IP Configuration Guide For MNs on virtual networks, the active and standby HAs are peers—e it h er HA ca n h and le r e gi str a ti o n requests from the MN and update the mobility binding table on the peer HA.
Configuring Mobile IP Mobile IP Conf iguration Ta sk List IPC-167 Cisco IOS IP Configuration Guid e Because Mobile IP requires support on the host de vice, each mobile node must be appropriatel y configured for t he desired Mobile IP service with client software.
Configuri ng Mobile IP Mobile IP Configuration Task List IPC-168 Cisco IOS IP Configuration Guide Enabling Foreign Agent Services Foreign agent services need to be enabled on a router attached to any subnet into whi ch a mobile node may be roaming.
Configuring Mobile IP Mobile IP Conf iguration Ta sk List IPC-169 Cisco IOS IP Configuration Guid e Configuring RADIUS in the Mobile IP Environment Remote Authentication Dial-in User Service (RA DIUS) is a method fo r def ining the e xchange of AAA information in the netw ork.
Configuri ng Mobile IP Mobile IP HA Redundanc y Configuration T ask List IPC-170 Cisco IOS IP Configuration Guide Monitoring and Maintaining Mobile IP T o monitor and maintain Mobile IP , use any of t.
Configuring Mobile IP Mobile IP HA Redunda ncy Configuration Task List IPC-171 Cisco IOS IP Configuration Guid e • Enabling HSRP (Required) • Enabling HA Redundan cy for a Physi cal Network (Requi.
Configuri ng Mobile IP Mobile IP HA Redundanc y Configuration T ask List IPC-172 Cisco IOS IP Configuration Guide Enabling HA Redundancy for a Physical Network T o enable HA redundancy for a p hysical.
Configuring Mobile IP Mobile IP HA Redunda ncy Configuration Task List IPC-173 Cisco IOS IP Configuration Guid e Enabling HA Redundancy for a Virtual Network Using Multiple Physical Networks T o enabl.
Configuri ng Mobile IP Mobile IP HA Redundanc y Configuration T ask List IPC-174 Cisco IOS IP Configuration Guide Enabling HA Redundancy for Multiple Virtual Networks Using One Physical Network T o en.
Configuring Mobile IP Mobile IP HA Redunda ncy Configuration Task List IPC-175 Cisco IOS IP Configuration Guid e Verifying HA Redundancy T o verify that the Mobile IP Home Agent Redundan cy feature i s conf igured correctl y on the router , perform the follo wing steps: Step 1 Enter the show ip mobile glo bals EXEC command.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-176 Cisco IOS IP Configuration Guide Monitoring and Maintaining HA Redundancy T o monitor and maintain HA redundancy , use th e followi ng c.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-177 Cisco IOS IP Configuration Guid e ! ! The next ten lines specify security associations for mobile hosts ! on virtual network 10.0.0.0 ! ip mobile secure host 10.0.0.1 spi 100 key hex 12345678123456781234567812345678 ip mobile secure host 10.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-178 Cisco IOS IP Configuration Guide aaa new-model aaa authorization ipmobile radius ! ip mobile home-agent ip mobile virtual-network 20.0.0.0 255.0.0.0 ip mobile host 20.0.0.1 20.0.0.3 virtual-network 20.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-179 Cisco IOS IP Configuration Guid e V irtual n etwork Mult iple ip mobile home-agent addr ess addr e ss In this conf iguration , addr ess is the loopback interface ad dress.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-180 Cisco IOS IP Configuration Guide HA Redundancy for Physi cal Networks Example Figure 30 sho ws an example network topology for physical networks. The configuration example supports home agents that are on the s ame or a dif ferent ph ysical network as the mobi le node.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-181 Cisco IOS IP Configuration Guid e Figur e 30 T opolog y Sho wing HA Redund anc y on a Ph ysical Networ k HA1 is fav ored to provide home agent service for mobile nodes on physical network e0 because the priority is set to 110, which is abov e the def ault of 100.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-182 Cisco IOS IP Configuration Guide HA2 Configuration interface ethernet0 ip address 1.0.0.2 255.0.0.0 standby ip 1.0.0.10 standby name SanJoseHA ip mobile home-agent standby SanJoseHA ip mobile secure home-agent 1.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-183 Cisco IOS IP Configuration Guid e Mobile Node and Home Age nt on Same Subnet In this e xample, a loopback address is conf igured on the HA to be on the same subnet as the virt ual network.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-184 Cisco IOS IP Configuration Guide Mobile nodes are conf igured with a home ag ent address 10.0.0.10. When r egi strations come in, either home agent processes them (depend ing on routing pr otocols) and updates th e peer home agent.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-185 Cisco IOS IP Configuration Guid e ip mobile secure home-agent 1.0.0.1 spi 100 key hex 00112233445566778899001122334455 ip mobile secure home-agent 2.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-186 Cisco IOS IP Configuration Guide HA Redundancy for Multiple Virtual Networks Using One Physical Network Example This section presents tw o conf iguration e xamples: • The mobile no de and home ag ent are on different subnets.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-187 Cisco IOS IP Configuration Guid e Figur e 32 T opolog y Sho wing HA Redundanc y on Mu ltiple V irt ual Netw or ks Using One Ph ysical N.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-188 Cisco IOS IP Configuration Guide standby ip 1.0.0.10 standby name SanJoseHA ! specifies global HA address=HSRP group address to be used by all mobile nodes ip mobile home-agent address 1.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-189 Cisco IOS IP Configuration Guid e HA Redundancy for Multiple Virtual Networks Using Multiple Physical Networks Example This section presents tw o conf iguration e xamples: • The mobile no de and home ag ent are on different subnets.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-190 Cisco IOS IP Configuration Guide Note All routers must ha ve identical loopback interf ace addresses, which will be used as the gl obal HA address. Ho we ver , do not use this address as the router ID for routing protocols.
Configuring Mobile IP Mobile IP Config uration Examp les IPC-191 Cisco IOS IP Configuration Guid e Mobile Node and Home Age nt on Same Subnet For each vi rtual network, a loopb ack address is conf ig ured on the HA to be on the same subnet as the virtual network.
Configuri ng Mobile IP Mobile IP Configuration Examples IPC-192 Cisco IOS IP Configuration Guide ip mobile virtual-network 30.0.0.0 255.0.0.0 address 30.
IP Routing P r otocols.
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IPC-195 Cisco IOS IP Configuration Guide Configuring On-Demand Routing This chapter describes how to conf igure On-Demand Routing (ODR). F or a complete description of th e ODR commands in this chapter , refer to the “On-Demand Routing Commands” chap ter of the Cisco IOS IP Command Refer ence, V olume 2 of 3: Routing Pr otocols publ ication.
Configuring On-Demand Routing IPC-196 Cisco IOS IP Configuration Guide T o identify the har dware platform or softw are imag e information associated with a feature, use the Feature Na vigator on Cisco.com to search for inform ation about the feature or refer to the software release notes for a specifi c release.
Configuring On-D emand Routing IPC-197 Cisco IOS IP Configuration Guid e Filtering ODR Information The hub router wil l attempt to populat e the IP routing table with ODR routes as the y are learned dynamically from stub routers. The IP next hop for these routes is the IP ad dress of the neighboring router as advertised through CDP .
Configuring On-Demand Routing IPC-198 Cisco IOS IP Configuration Guide Other CDP features are described in the Cisco IOS Conf igur ation Fundamenta ls Conf igur ation Guide , in the “Monitoring the Router and Netw ork” chapter .
IPC-199 Cisco IOS IP Configuration Guide Configuring Routing Information Protocol This chapter describes ho w to configure Rou ting Info rmation Protocol (RIP).
Configuring Routing Information Protocol RIP Configuration Task List IPC-200 Cisco IOS IP Configuration Guide T o identify the har dware platform or softw are imag e information associated with a feature, use the Feature Na vigator on Cisco.
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-201 Cisco IOS IP Configuration Guid e Allowing Unicast Updates for RIP Because RIP is normally a broadcast proto col, in order.
Configuring Routing Information Protocol RIP Configuration Task List IPC-202 Cisco IOS IP Configuration Guide T o adjust the timers, use the follo wing command in router conf iguration mod e: See the “ Address Family T imers Example ” section at the end of this ch apter for examples of adjusting timers for an address family (VRF).
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-203 Cisco IOS IP Configuration Guid e Enabling RIP Authentication RIP V ersion 1 does not support authentication. If you are sending and receiving RIP V ersion 2 packets, you can enable RIP authen tication on an interface.
Configuring Routing Information Protocol RIP Configuration Task List IPC-204 Cisco IOS IP Configuration Guide • As specifically conf igured, adver tisi ng a summarized local IP address pool on th e specifi ed interface (on a network access server) so that the addres s pool can be provided t o dialup clients.
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-205 Cisco IOS IP Configuration Guid e Restrictions to RIP Route Summarization Supernet advert isement (adv ertising an y netwo.
Configuring Routing Information Protocol RIP Configuration Task List IPC-206 Cisco IOS IP Configuration Guide Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list fo.
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-207 Cisco IOS IP Configuration Guid e Disabling the Validation of Source IP Addresses By default, the softw are vali dates the source IP ad dress of incoming RIP routing updates.
Configuring Routing Information Protocol RIP Configuration Task List IPC-208 Cisco IOS IP Configuration Guide Configuring Interpacket Delay By default, the so ftware adds no delay between pa ckets in a multiple-pac ket RIP update being sent.
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-209 Cisco IOS IP Configuration Guid e T o display the contents of the RIP pri v ate database, use the f ollo wing command in E.
Configuring Routing Information Protocol RIP Configuration Task List IPC-210 Cisco IOS IP Configuration Guide Example 2: Incorrect Configuration The follo wing e xample sho ws an illegal use of the ip summary-address ri p router conf iguration command, because both addresses to b e summarize d hav e the same major ne twork.
Configuring Routing Info rmation Protocol RIP Configuration Task List IPC-211 Cisco IOS IP Configuration Guid e Figur e 35 Disabled Spli t Horiz on Example for Fr ame Relay Networ k In this ex ample, split horizon is di sabled on all serial interf aces.
Configuring Routing Information Protocol RIP Configuration Task List IPC-212 Cisco IOS IP Configuration Guide Address Family Timers Example The follo wing e xample sho ws ho w to adjust indiv idual address family timers.
IPC-213 Cisco IOS IP Configuration Guide Configuring IGRP This chapter describes ho w to confi gure the Interior Gate way Routing Protocol (IGRP). F or a complete description of the IGRP commands in this chapte r , refer to the “IGRP Commands” chapter of the Cisco IOS IP Command Refer ence , V olume 2 of 3: Routing Pr otocols .
Configuring IGRP IGRP Configuration Task List IPC-214 Cisco IOS IP Configuration Guide Figure 36 Inter ior , Syst em, and Exter ior Routes IGRP Updates By default, a router running IG RP sends an update broadca st e very 90 seconds.
Configuring IGRP IGRP Config uration Task List IPC-215 Cisco IOS IP Configuration Guid e • Disabling Hold do wn (Optional) • Enforcing a Maximum Netw ork Diameter (Optional) • V alidating Source.
Configuring IGRP IGRP Configuration Task List IPC-216 Cisco IOS IP Configuration Guide T o control the set of interfaces with which you want to e xchange routing upda tes, you can disable the sending of routing upd ates on specif ied interfaces b y conf iguring the pa ssiv e-interf ace router confi guration command.
Configuring IGRP IGRP Config uration Task List IPC-217 Cisco IOS IP Configuration Guid e T o control ho w traff ic is distrib uted among multiple routes of uneq ual cost, use the follo wing command in.
Configuring IGRP IGRP Configuration Task List IPC-218 Cisco IOS IP Configuration Guide T o adjust the timers, use the follo wing command in router conf iguration mod e: Disabling Holddown When the Cis.
Configuring IGRP IGRP Configuration Examples IPC-219 Cisco IOS IP Configuration Guid e Enabling or Disabling Split Horizon Normally , routers that are connected to broadcast-type IP networks and that use distance-vector routing protocols emplo y the split horizon mechanism to reduce the possibility of rou ting loops.
Configuring IGRP IGRP Configuration Examples IPC-220 Cisco IOS IP Configuration Guide IGRP Feasible Successor Relationship Example In Figure 37 , the assigned metrics meet the conditions re quired for a feasible su ccessor relationship, so the paths in this e xample can be included i n ro uting tables and be used for load balancin g.
Configuring IGRP IGRP Configuration Examples IPC-221 Cisco IOS IP Configuration Guid e Figur e 38 Disabled Sp lit Hor izon Example In this e xample, split horizon must b e disabled in order f or network 128.125 .0.0 to be adv ertised into network 131.
Configuring IGRP IGRP Configuration Examples IPC-222 Cisco IOS IP Configuration Guide.
IPC-223 Cisco IOS IP Configuration Guide Configuring OSPF This chapter describes ho w to conf igure Open Shortest P ath First (OSPF). F or a complete description of the OSPF commands in this chapter , refe r to the “OSPF Commands” chapter of the Cisco IOS IP Command Refer ence, V olume 2 of 3: Routi ng Pr otocols publication.
Configuring OSPF OSPF Configuration Task List IPC-224 Cisco IOS IP Configuration Guide • V irtual links—V irtual links are sup ported. • Not so stubb y area (NSSA)—RFC 1587.
Configuring OSPF Enabling OSPF IPC-225 Cisco IOS IP Configuration Guid e Enabling OSPF As with other routing protocol s, enabling OSPF requi res that you create an OSPF routing process, specify the range of IP addresses to be associated with the routing pr ocess, a nd assign area IDs to be associated with that range of IP addresses.
Configuring OSPF Configuring OSPF over D ifferent Physic al Networks IPC-226 Cisco IOS IP Configuration Guide Configuring OSPF over Different Physical Networks OSPF classif ies dif ferent media into t.
Configuring OSPF Configuring OSPF over Different Physic al Networks IPC-227 Cisco IOS IP Configuration Guid e T o conf igure your OSPF network t ype, use the follo wing command in interface conf igura.
Configuring OSPF Configuring OSPF Area Parameters IPC-228 Cisco IOS IP Configuration Guide These parameters need only be conf igured in those de vices that are themselves eligible to become the designated ro uter or backup de signated router (in o ther words, routers with a non zero router priority va lu e ) .
Configuring OSPF Configuring OSPF NSSA IPC-229 Cisco IOS IP Configuration Guid e Stub ar eas are areas into which information on e xternal routes is not sent. Instead, there is a def ault external rou te generated by t he ABR, into the stub area for destinations outs ide the autonomous system.
Configuring OSPF Configuring Route Summarization Between O SPF Areas IPC-230 Cisco IOS IP Configuration Guide T o control summarization and f iltering of t ype 7 LS As into type 5 LSAs, use the foll o.
Configuring OSPF Creating Virtual Links IPC-231 Cisco IOS IP Configuration Guid e T o have the sof tware adv ertise one summar y route for all redistrib uted rout es cov ered b y a network address and mask, use the foll o wing command in router con fi guration mode: Creating Virtual Links In OSPF , all areas must be connected to a backbone area.
Configuring OSPF Configuring Look up of DNS Names IPC-232 Cisco IOS IP Configuration Guide Configuring Lookup of DNS Names Y ou can confi gure OSPF to look up Domain Na ming System (DNS) names for use in all OSPF show EXEC command displays.
Configuring OSPF Changing the OSPF Ad ministrative Distances IPC-233 Cisco IOS IP Configuration Guid e Changing the OSPF Administrative Distances An administrati v e distance is a rating of the trustw orthiness of a routing informati on source, such as an indi vidual rout er or a group of rout ers.
Configuring OSPF Configuring OSPF over On-Dema nd Circuits IPC-234 Cisco IOS IP Configuration Guide Configuring OSPF over On-Demand Circuits The OSPF on-demand circuit is an enhancement t o the OSPF protocol th at allo ws efficient operation ov er on-demand circuits li ke ISDN, X.
Configuring OSPF Logging Neighbors Go ing Up or Down IPC-235 Cisco IOS IP Configuration Guid e Implementation Considerations Ev aluate the follo wing considerations befor e implementing this feature: .
Configuring OSPF Changing the LSA Grou p Pacing IPC-236 Cisco IOS IP Configuration Guide OSPF LSA group pacing is enabled by def ault. For t ypical customers, the def au lt group pacing interv al for refreshing, checksumming, an d aging is appropri ate and you need not co nfi gure this feature.
Configuring OSPF Blocking OSPF LSA Flooding IPC-237 Cisco IOS IP Configuration Guid e Figure 40 OSPF LSAs on Indi vidual Timers with Gr oup P acing The group pacing interv al is inv ersely p roportional to t he number of LSAs the ro uter is refreshing, checksumming, and aging.
Configuring OSPF Reducing LSA Flooding IPC-238 Cisco IOS IP Configuration Guide On point-to-multipoint netw orks, to pre vent floo ding of OSPF LSAs, use the follo w ing command in router configuration mo de: For an e xample of blocking LSA flooding, see the section “ Block LSA Floo ding Example ” at the end of this chapter .
Configuring OSPF Displaying OSPF Update Packe t Pacing IPC-239 Cisco IOS IP Configuration Guid e Displaying OSPF Update Packet Pacing The former OSPF implementation for sending update packet s needed to be more ef ficient.
Configuring OSPF Monitoring and Maintaining OSPF IPC-240 Cisco IOS IP Configuration Guide Monitoring and Maintaining OSPF Y ou can display spec ifi c statisti cs such as the cont ents of IP routing tables, caches, and databases. Information pro vided can be used to determine r eso urce utilization and sol ve netw ork problems.
Configuring OSPF OSPF Configuration Examples IPC-241 Cisco IOS IP Configuration Guid e T o restart an OSPF process, use the follo wing command in EXEC mode: OSPF Configuration Examples The follo wing .
Configuring OSPF OSPF Configuration Examples IPC-242 Cisco IOS IP Configuration Guide Figur e 41 OSPF P o int-t o-Multipoint Example Mollie Configuration hostname mollie ! interface serial 1 ip address 10.0.0.2 255.0.0.0 ip ospf network point-to-multipoint encapsulation frame-relay frame-relay map ip 10.
Configuring OSPF OSPF Configuration Examples IPC-243 Cisco IOS IP Configuration Guid e Jelly Configuration hostname jelly ! interface serial 2 ip address 10.0.0.3 255.0.0.0 ip ospf network point-to-multipoint encapsulation frame-relay clock rate 2000000 frame-relay map ip 10.
Configuring OSPF OSPF Configuration Examples IPC-244 Cisco IOS IP Configuration Guide U - per-user static route, o - ODR Gateway of last resort is not set C 1.0.0.0/8 is directly connected, Loopback0 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks O 10.
Configuring OSPF OSPF Configuration Examples IPC-245 Cisco IOS IP Configuration Guid e In the following e xample, a 30-bit subnet mask is used, leaving two bi ts of address space reserv ed for serial line host addresses. Th ere is suff icient host address space for two host endpoints on a point-to-point serial link .
Configuring OSPF OSPF Configuration Examples IPC-246 Cisco IOS IP Configuration Guide Basic OSPF Configuration Example fo r Internal Router, ABR, and ASBRs The follo wing e xample illustrates th e assignment of four area IDs to four IP address ranges.
Configuring OSPF OSPF Configuration Examples IPC-247 Cisco IOS IP Configuration Guid e Figur e 42 Sample OSPF A ut onomous S ystem Netw or k Map In this conf iguration, f iv e routers are conf igured with OSPF: • Router A and Router B are both internal r outers wit hin area 1.
Configuring OSPF OSPF Configuration Examples IPC-248 Cisco IOS IP Configuration Guide Note It is not necessary to include definit ions of all areas in an OSPF autonomous system in the confi guration of all routers in the autonomous system. Y ou must only def ine the dir ectly connected areas.
Configuring OSPF OSPF Configuration Examples IPC-249 Cisco IOS IP Configuration Guid e router bgp 109 network 131.108.0.0 network 10.0.0.0 neighbor 11.0.0.6 remote-as 110 Complex OSPF Configuration for ABR Examples The follo wing e xample conf iguration accomplishes se v eral tasks in setting up an ABR.
Configuring OSPF OSPF Configuration Examples IPC-250 Cisco IOS IP Configuration Guide interface ethernet 0 ip address 192.42.110.201 255.255.255.0 ip ospf authentication-key abcdefgh ip ospf cost 10 ! interface ethernet 1 ip address 131.119.251.201 255.
Configuring OSPF OSPF Configuration Examples IPC-251 Cisco IOS IP Configuration Guid e The follo wing e xample redistrib utes RIP routes with a h op count equal to 1 into OSPF . These routes will be redistrib uted into OSPF as e xternal LSAs with a me tric of 5, a metric type of type 1, and a tag equal to 1.
Configuring OSPF OSPF Configuration Examples IPC-252 Cisco IOS IP Configuration Guide route-map 1 permit match tag 3 set metric 5 ! route-map 1 deny match tag 4 ! route map 1 permit match tag 5 set metric 5 In the follo wing conf iguration, a RIP learned route for netwo rk 160.
Configuring OSPF OSPF Configuration Examples IPC-253 Cisco IOS IP Configuration Guid e Figur e 44 OSPF Administrativ e Distance Router A Configuration router ospf 1 redistribute ospf 2 subnet distance.
Configuring OSPF OSPF Configuration Examples IPC-254 Cisco IOS IP Configuration Guide Figur e 45 OSPF over On-Demand Cir cuit Router A Configuration username RouterB password 7 060C1A2F47 isdn switch-type basic-5ess ip routing ! interface TokenRing0 ip address 140.
Configuring OSPF OSPF Configuration Examples IPC-255 Cisco IOS IP Configuration Guid e LSA Group Pacing Example The follo wing e xample changes the OSPF paci ng between LSA groups to 60 seconds: route.
Configuring OSPF OSPF Configuration Examples IPC-256 Cisco IOS IP Configuration Guide.
IPC-257 Cisco IOS IP Configuration Guide Configuring EIGRP This chapter describe s ho w to configure Enhanced Interior G ate way Routing Protocol (EIGR P).
Configurin g EIGRP The Cisco EIGRP Implementation IPC-258 Cisco IOS IP Configuration Guide Note Redistrib ution between EIGRP and IGRP dif fers from normal redi strib ution in that the metri cs of IGRP routes are compared with the metrics of external EIGRP routes.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-259 Cisco IOS IP Configuration Guid e con v ergen ce time. Recomputation is processor -inte nsi v e; it is adv antageo us to av oid unneeded recomputation. When a topology ch ange occurs, DUAL will test fo r feasible successors.
Configurin g EIGRP EIGRP Configuration Task List IPC-260 Cisco IOS IP Configuration Guide Making the Transition from IGRP to EIGRP If you ha v e routers on your netw ork that are conf igured for IGRP , and you want to make a tr ansition to routing EIGRP , you must designate transition ro uters that ha ve both IGRP and EIGRP conf igured.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-261 Cisco IOS IP Configuration Guid e T o adjust the EIGRP metric weights, use the fol lo wing command in router conf iguration mode: By default, .
Configurin g EIGRP EIGRP Configuration Task List IPC-262 Cisco IOS IP Configuration Guide • The K-v alue mismatch error message can also be di splayed if one of the two peers has transmitted a “goodbye” message, and the recei ving router does not support this messag e.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-263 Cisco IOS IP Configuration Guid e Route summarization w orks in conjunction with the ip summary-address eigrp interface configuration command, in which additio nal summarization can be pe rformed.
Configurin g EIGRP EIGRP Configuration Task List IPC-264 Cisco IOS IP Configuration Guide Figure 46 Floating Su mmary Route is Applied t o Rout er -B The confi guration of the default su mmary route on Router -B sends a 0.0.0.0/0 summary route to Router-C an d blocks all other routes, incl uding the 10.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-265 Cisco IOS IP Configuration Guid e Figure 47 Floa ting Summary Route Applied for Dual-Homed Remot es Ho we ver , if the link between Router -D and Router-E f ails, the network may b lackhole traf f ic because Router-E will continue to ad vertise th e default r oute( 0.
Configurin g EIGRP EIGRP Configuration Task List IPC-266 Cisco IOS IP Configuration Guide Each ke y has its o wn k ey identif ier (specified with the key number k ey ch ain conf igurat ion command), which is stored locally .
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-267 Cisco IOS IP Configuration Guid e By default, hell o packets are sent e v ery 5 seconds. The e xception is on lo w-speed, nonb roadcast multiaccess (NBMA) media, where the defau lt hello inte rv al is 60 seconds.
Configurin g EIGRP EIGRP Configuration Task List IPC-268 Cisco IOS IP Configuration Guide Configuring EIGRP Stub Routing The EIGRP Stub Routing feat ure improv es networ k stability , reduces resource utilization, and simplif ies stub router configuration.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-269 Cisco IOS IP Configuration Guid e only a default ro ute to the remote router . The EIGRP Stub Routing feature does not automatically enable summarization on t he distrib ution router .
Configurin g EIGRP EIGRP Configuration Task List IPC-270 Cisco IOS IP Configuration Guide Dual-homed routing can i ntroduce instabilit y into an EIGRP netwo rk.
Configuring EIGRP EIGRP Conf iguration Ta sk List IPC-271 Cisco IOS IP Configuration Guid e Figure 51 Dual-Homed Remote T opology with a Failed Rout e to a Distr ib ution Router It is not desirable for traf fic from distrib ution router 2 to t rav el throug h any remote rou ter in order to reach network 10.
Configurin g EIGRP Monitoring and Maintaining EIGRP IPC-272 Cisco IOS IP Configuration Guide EIGRP Stub Routing Configuration Task List T o configure EIGRP Stub Routin g, perform the tasks described in t he follo wing sections. The tasks in the fi rst section are r equired; the task in the last section is opt ional.
Configuring EIGRP EIGRP Configuration Examples IPC-273 Cisco IOS IP Configuration Guid e T o display various rou ting statistics, use the f ollo wing commands in EXEC mode, as needed: T o enable EIGRP.
Configurin g EIGRP EIGRP Configuration Examples IPC-274 Cisco IOS IP Configuration Guide instead, this traf fic will be sent to the null 0 interf ace where it is dropped. The recommended way to sen d only the default route out a gi v en interface is to use a distrib ute-list command .
Configuring EIGRP EIGRP Configuration Examples IPC-275 Cisco IOS IP Configuration Guid e Route Authentication Example The follo wing example enables MD5 authentication on EIGRP packets in autonomous system 1.
Configurin g EIGRP EIGRP Configuration Examples IPC-276 Cisco IOS IP Configuration Guide Stub Routing Example A router that is configured as a stub with the eigr p stub command sh ares conn ected and su mmary routing information w ith all neighbor rout ers by def ault.
IPC-277 Cisco IOS IP Configuration Guide Configuring Integrated IS-IS This chapter describes ho w to conf ig ure Inte grated Intermediate System -to-Intermediate System (IS-IS).
Configuring Integrated IS-IS IS-IS Configuration Task List IPC-278 Cisco IOS IP Configuration Guide Small IS-IS networks are built as a si ngle area that includes all the routers in the n etwork.
Configuring Integrated IS-IS IS-IS Interface Parameters Con figuration Task List IPC-279 Cisco IOS IP Configuration Guid e Enabling IP Routing for an Area on an Interface T o enable IP routing and spe.
Configuring Integrated IS-IS IS-IS Interface Parameters Configuration Task List IPC-280 Cisco IOS IP Configuration Guide Configuring IS-IS Link-State Metrics Y ou can configure a cost for a specif ied interf ace. Y ou can configure the defa ult-metric v alue for Le vel 1 or Le vel 2 routi ng.
Configuring Integrated IS-IS IS-IS Interface Parameters Con figuration Task List IPC-281 Cisco IOS IP Configuration Guid e Setting the Retransmission Interval Y ou can configure the number of s econds between retransmission of IS -IS link-state packets (LSPs) for point-to-point links.
Configuring Integrated IS-IS IS-IS Interface Parameters Configuration Task List IPC-282 Cisco IOS IP Configuration Guide Setting the Hello Multiplier T o specify the nu mber of IS-IS hello packets a neighbor mu st miss before the ro uter should declare the adjacency as down, use th e follo wing command in interf ace conf iguration command.
Configuring Integrated IS-IS IS-IS Interface Parameters Con figuration Task List IPC-283 Cisco IOS IP Configuration Guid e Limiting LSP Flooding Limiting LSP floodin g is important to IS-IS net works in gen eral, and is not limi ted to conf iguring multiarea IS-IS netw orks.
Configuring Integrated IS-IS Miscellaneous IS-IS Paramete rs Configuration Task List IPC-284 Cisco IOS IP Configuration Guide Miscellaneous IS-IS Parameters Configuration Task List The following tasks dif fer from the preceding inte rface-specif ic IS-IS tasks because they conf igure IS-IS itself, rather than the in terface.
Configuring Integrated IS-IS Miscellaneous IS-IS Paramete rs Configuration Task List IPC-285 Cisco IOS IP Configuration Guid e Configuring IS-IS Authentication Passwords Y ou can assign password s to areas and domains.
Configuring Integrated IS-IS Miscellaneous IS-IS Paramete rs Configuration Task List IPC-286 Cisco IOS IP Configuration Guide Unless you specify the on-sta rtup keyw ord, this command sets the o verl oad bit immediately and it remains set until the no set-ov erload-bit command is specif ied.
Configuring Integrated IS-IS Miscellaneous IS-IS Paramete rs Configuration Task List IPC-287 Cisco IOS IP Configuration Guid e T o change the LSP refresh interv al or li fetime, use the appropriate co.
Configuring Integrated IS-IS Miscellaneous IS-IS Paramete rs Configuration Task List IPC-288 Cisco IOS IP Configuration Guide Other commands are a v ailable to control the delay be tween successi ve LSPs, th e retransmission of the same LSA, and the retransmission of LSPs on a point-to-poi nt interface.
Configuring Integrated IS-IS Monitoring IS-IS IPC-289 Cisco IOS IP Configuration Guid e Area A3253-01: System Id Interface SNPA State Holdtime Type Protocol 0000.0000.0053 Et1 0060.3e58.ccdb Up 22 L1 IS-IS 0000.0000.0003 Et1 0000.0c03.6944 Up 20 L1 IS-IS -------------- Area A3253-02: System Id Interface SNPA State Holdtime Type Protocol 0000.
Configuring Integrated IS-IS IS-IS Configuration Examples IPC-290 Cisco IOS IP Configuration Guide interface serial 0 ip router isis Router C Configuration router isis net 49.
Configuring Integrated IS-IS IS-IS Configuration Examples IPC-291 Cisco IOS IP Configuration Guid e router isis BB ! Defaults to "is-type level-1-2" net 49.2222.0000.0000.0005.00 ! router isis A3253-01 net 49.0553.0001.0000.0000.0005.00 is-type level-1 ! router isis A3253-02 net 49.
Configuring Integrated IS-IS IS-IS Configuration Examples IPC-292 Cisco IOS IP Configuration Guide.
IPC-293 Cisco IOS IP Configuration Guide Configuring BGP This chapter descri bes ho w to configure Border Gateway Protocol (BGP). For a complete description of the BGP commands in this chapter , refe r to the “BGP Co mmands” chapter of the Cisco IOS IP Command Refer ence, V olume 2 of 3: Routi ng Pr otocols .
Configuring BGP The Cisco BGP Impleme ntation IPC-294 Cisco IOS IP Configuration Guide BGP V ersion 4 supports classless int erdomain routing (CIDR), whi ch lets you reduce the size of your routing tables by creating ag gregate routes, resulting in supernets .
Configuring BGP Basic BGP Configuration Task List IPC-295 Cisco IOS IP Configuration Guid e 10. Prefer the route that can be re ached through the closest IGP neighbor (the lo west IGP metric). The router will prefer the shor test internal path within the autonomous system to reach the destination (the shortest p ath to the BGP ne xt hop).
Configuring BGP Advanced BG P Configuration Task List IPC-296 Cisco IOS IP Configuration Guide • Disabling Ne xt Hop Processing on BGP Updates (Opt ional) • Config uring the BGP V ersion (Optional.
Configuring BGP Configuring Basic BGP Feature s IPC-297 Cisco IOS IP Configuration Guid e Configuring Basic BGP Features The tasks described in this section are for conf iguring basic BGP f eatures.
Configuring BGP Configuring Basic BGP Features IPC-298 Cisco IOS IP Configuration Guide Managing Routing Policy Changes Routing policies for a peer include all the conf igurations such as route-map , distrib ute-list, pref ix-list, and fil ter-list th at may impact inbound or outbo und routing table updates.
Configuring BGP Configuring Basic BGP Feature s IPC-299 Cisco IOS IP Configuration Guid e A soft reset updates the routing table f or inbound and o utbound routing updates. Cisco IOS sof tware Release 12.1 and later re leases support soft reset with out any prior conf iguration.
Configuring BGP Configuring Basic BGP Features IPC-300 Cisco IOS IP Configuration Guide Resetting a Router Using BGP Outbound Soft Reset Outbound soft resets do not require an y preconf iguration. Using the soft ke yword specifies that a soft reset be performed.
Configuring BGP Configuring Basic BGP Feature s IPC-301 Cisco IOS IP Configuration Guid e Verifying BGP Soft Reset T o v erify whether a soft reset is successful and ch eck information abou t the rout.
Configuring BGP Configuring Basic BGP Features IPC-302 Cisco IOS IP Configuration Guide Connection state is ESTAB, I/O status: 1, unread input bytes: 0 Local host: 172.
Configuring BGP Configuring Basic BGP Feature s IPC-303 Cisco IOS IP Configuration Guid e In most circumstances, you al so will not w ant to redistrib ute your IGP into BGP . List the networks in your autonomous system wi th netw ork router conf iguration commands and you r networks will be advertis ed.
Configuring BGP Configuring Basic BGP Features IPC-304 Cisco IOS IP Configuration Guide Configuring BGP Route Filtering by Neighbor Y ou can filter BGP advertis ements in two way s: • Use autonomous.
Configuring BGP Configuring Basic BGP Feature s IPC-305 Cisco IOS IP Configuration Guid e • More user-friend ly command-line interface (CLI). The command-line interface for using access lists to fi lter BGP updates is dif ficult to understand and use because it us es the packet f iltering f ormat.
Configuring BGP Configuring Basic BGP Features IPC-306 Cisco IOS IP Configuration Guide Configuring a Prefix List Entry Y ou can add entries to a pref ix list individually .
Configuring BGP Configuring Basic BGP Feature s IPC-307 Cisco IOS IP Configuration Guid e If you disable automatic generation of sequence numbers in a pref ix list, you must specify the sequence number for each entry usin g the sequence-value argument of the ip pref ix-list global conf iguration command.
Configuring BGP Configuring Basic BGP Features IPC-308 Cisco IOS IP Configuration Guide Clearing the Hit Count Table of Prefix List Entries T o clear the hit count table of prefi x list entries, use t.
Configuring BGP Configuring Basic BGP Feature s IPC-309 Cisco IOS IP Configuration Guid e Disabling Next Hop Processi ng Using a Specific Address T o disable next hop processin g and provi de a specif.
Configuring BGP Configuring Basic BGP Features IPC-310 Cisco IOS IP Configuration Guide The configuration of this feature in conjunctio n with the iBGP Multipath Load Sharing feature allo ws you to use an outbound ro ute map to include BGP rout e reflectors in th e forwarding path.
Configuring BGP Configuring Adv anced BGP Features IPC-311 Cisco IOS IP Configuration Guid e Configuring Advanced BGP Features The tasks in this section are for configuring advanced BGP features. Using Route Maps to Modify Updates Y o u can use a route map on a p er-n eighbor basis to f ilter updates and modify v arious attrib utes.
Configuring BGP Configuring Adva nced BGP Features IPC-312 Cisco IOS IP Configuration Guide T o create an aggre gate address in the routing table, use the follo wing commands in router conf iguration mode: See the “ BGP Aggregate Route Examples ” section at the end o f this ch apter for e xamples of using BGP aggregate routes.
Configuring BGP Configuring Adv anced BGP Features IPC-313 Cisco IOS IP Configuration Guid e The communities attrib ute is an option al, transiti v e, global at tribu te in the numerical rang e from 1 to 4,294,967,200.
Configuring BGP Configuring Adva nced BGP Features IPC-314 Cisco IOS IP Configuration Guide Specifying the Format for the Community A BGP community is displayed in a two-part format 2 b ytes long in t.
Configuring BGP Configuring Adv anced BGP Features IPC-315 Cisco IOS IP Configuration Guid e BGP Conditional Advertisement Configuration Task List See the follo wing section for conf iguration tasks fo r the BGP Conditi onal Adve rtisement feature. Each task in the list indicates if th e task is optional or required.
Configuring BGP Configuring Adva nced BGP Features IPC-316 Cisco IOS IP Configuration Guide Inbound soft reconfiguration allowed NEXT_HOP is always this router Community attribute sent to this neighbo.
Configuring BGP Configuring Adv anced BGP Features IPC-317 Cisco IOS IP Configuration Guid e In order to treat the neighbor s from other autonomou s systems within the conf ederation as special eBGP p.
Configuring BGP Configuring Adva nced BGP Features IPC-318 Cisco IOS IP Configuration Guide Figur e 56 Simple BGP Model with a Rout e Reflect or The internal peers of the route refl ector are di vided into two g roups: client peers and all the other rou ters in the autonomous system (nonclient peers).
Configuring BGP Configuring Adv anced BGP Features IPC-319 Cisco IOS IP Configuration Guid e Figure 57 illustr ates a more comple x route reflector scheme . Router A is the route reflector in a cluster with routers B, C, and D. Rout ers E, F , and G are fully meshed, nonclient ro uters.
Configuring BGP Configuring Adva nced BGP Features IPC-320 Cisco IOS IP Configuration Guide T o disable client-to-client route r eflection, use the no bgp client-to-cl ient reflecti on command in router confi guration mode: As the iBGP le arned routes are refle cted, routing information may loop.
Configuring BGP Configuring Adv anced BGP Features IPC-321 Cisco IOS IP Configuration Guid e Assigning Options to the Peer Group After you create a peer grou p, you conf igure the peer gro up with neighbor co mmands. By default, members of the peer gro up inherit all the conf iguratio n options of the peer group.
Configuring BGP Configuring Adva nced BGP Features IPC-322 Cisco IOS IP Configuration Guide If a peer group is not conf igured with a remote-as attrib ute, the members can be conf igured with the neighbor remote-as rou ter confi guration command. This command allo ws you to create p eer groups containing eBGP neighb ors.
Configuring BGP Configuring Adv anced BGP Features IPC-323 Cisco IOS IP Configuration Guid e Configuring MD5 Authentication for BGP Pe ering Sessions Y ou can configure MD 5 authenticati on between two BG P peers, meaning that each segment sent on the TCP connection between th e peers is v erif ied.
Configuring BGP Configuring Adva nced BGP Features IPC-324 Cisco IOS IP Configuration Guide See the “ BGP Peer Group Examples ” at the end of this chapter for an example of enabling MD5 authentication.
Configuring BGP Configuring Adv anced BGP Features IPC-325 Cisco IOS IP Configuration Guid e Indicating Backdoor Routes Y ou can indicate which networks are reachable by using a bac kdoor route that th e border router shoul d use. A backdoor network is treated as a local networ k, except that it is not advertised.
Configuring BGP Configuring Adva nced BGP Features IPC-326 Cisco IOS IP Configuration Guide T o adjust BGP timers for all neighbo rs, use the follo wing comman d in router conf iguration mode: T o adj.
Configuring BGP Configuring Adv anced BGP Features IPC-327 Cisco IOS IP Configuration Guid e Configuring the Router to Consider a Missing MED as Worst Path T o configure the rout er to consider a path.
Configuring BGP Configuring Adva nced BGP Features IPC-328 Cisco IOS IP Configuration Guide In this case, p ath 1 would be ch osen if the bgp bestpath med confed rout er conf iguratio n command is enabled.
Configuring BGP Configuring Adv anced BGP Features IPC-329 Cisco IOS IP Configuration Guid e to advertise th e status of the route t o neighbors. The penalties are cumulati ve.
Configuring BGP Configuring Adva nced BGP Features IPC-330 Cisco IOS IP Configuration Guide T o change the defaul t v alues of v arious dampening f actors, use the follo wing command in address family or router conf iguration mode: Monitoring and Maintaining BGP Route Dampening Y ou can monitor the flaps of all the paths that are fl apping.
Configuring BGP Monitoring and Maintaining BGP IPC-331 Cisco IOS IP Configuration Guid e Once a route is dampened, you can display BGP route dampening information, i ncluding the time remaining before the dampened routes will be un suppressed.
Configuring BGP BGP Configuration Exa mples IPC-332 Cisco IOS IP Configuration Guide T o display various rou ting statistics, use the f ollo wing commands in EXEC mode, as needed: Logging Changes in N.
Configuring BGP BGP Configuration Examples IPC-333 Cisco IOS IP Configuration Guid e • BGP Prefix List Filtering Examples • BGP Soft Reset Examples • BGP Synchronization Examples • BGP Path Fi.
Configuring BGP BGP Configuration Exa mples IPC-334 Cisco IOS IP Configuration Guide set local-preference 25 set metric 127 set weight 30000 set next-hop 192.92.68.24 set origin igp ! access-list 1 permit 131.108.0.0 0.0.255.255 access-list 1 permit 160.
Configuring BGP BGP Configuration Examples IPC-335 Cisco IOS IP Configuration Guid e Inbound route maps could perform pref ix-based matc hing and set v arious parameters of the update. Inbound pref ix matching is a v ailable in addition to autonomo us system path and commun ity list matching.
Configuring BGP BGP Configuration Exa mples IPC-336 Cisco IOS IP Configuration Guide neighbor 1.1.1.3 remote-as 300 neighbor 1.1.1.3 route-map set-peer-address out route-map set-peer-address permit 10 set ip next-hop peer-address Router C Configuration router bgp 300 neighbor 1.
Configuring BGP BGP Configuration Examples IPC-337 Cisco IOS IP Configuration Guid e Figur e 58 Assigning Int er nal and Exter nal BGP Neighbors BGP Prefix List Filtering Examples The follo wing e xam.
Configuring BGP BGP Configuration Exa mples IPC-338 Cisco IOS IP Configuration Guide The follo wing e xample conf iguration sho ws ho w to conditionally originate a default route (0.0.0.0/0) in RIP when a pref ix 10.1.1.0/24 e xists in the routin g table: ip prefix-list cond permit 10.
Configuring BGP BGP Configuration Examples IPC-339 Cisco IOS IP Configuration Guid e Added or Deleted Prefix List Entries Examples Y ou can add or delete in div idual entries in a pref ix list if a pref ix list has the follo wing initial configuration: ip prefix-list abc deny 0.
Configuring BGP BGP Configuration Exa mples IPC-340 Cisco IOS IP Configuration Guide BGP Synchronization Examples The example sho w n in Figure 59 sho w s ho w to use the no synchronization router conf iguration command. In the f igure, synchron ization is on, and Router B does not adv ertise networ k 198.
Configuring BGP BGP Configuration Examples IPC-341 Cisco IOS IP Configuration Guid e BGP Aggregate Route Examples The follo wing e xamples sho w ho w you can use aggre g ate routes in BGP either by redistribu ting an aggreg ate route into BGP or b y using the BGP Condit ional Aggre gate r outing feature.
Configuring BGP BGP Configuration Exa mples IPC-342 Cisco IOS IP Configuration Guide The second example sho ws how the route map named set-commun ity is applied to the outb ound updates to neighbor 171.69.232. 90. All the routes that or iginate from autonomous system 70 ha v e the community v alues 200 200 added to their already existing va lues.
Configuring BGP BGP Configuration Examples IPC-343 Cisco IOS IP Configuration Guid e The next e xample sho ws how the rout e map named set-community is applied to t he outbound updat es to neighbor 171.69.232.5 0 and the local-as community attrib ute is used to filter th e routes.
Configuring BGP BGP Configuration Exa mples IPC-344 Cisco IOS IP Configuration Guide T o conditionally advertis e a set of routes, use the follo wing comman ds in router conf iguration mode: ip prefix-list BLUE permit 172.16.0.0 ip prefix-list RED permit 192.
Configuring BGP BGP Configuration Examples IPC-345 Cisco IOS IP Configuration Guid e The follo wing is a pa rt of the conf iguration from the BGP speaker 200 .200.200.205 from autono mous system 701 in t he same example. Neighbor 171.69.232.56 is con fi gured as a normal eBGP speak er from autonomous system 60000.
Configuring BGP BGP Configuration Exa mples IPC-346 Cisco IOS IP Configuration Guide neighbor 171.69.232.110 peer-group external-peers neighbor 171.69.232.110 filter-list 400 in TCP MD5 Authentication for BGP Examples The follo wing example enables the au thentication feature between this router and the BGP neighbor at 10.
IPC-347 Cisco IOS IP Configuration Guide Configuring Multiprotocol BGP Extensions for IP Multicast This chapter describes the mul tiprotocol Border Gate wa y Protocol (BGP) based upo n RFC 2283, Multipro tocol Exte nsions for BGP- 4 .
Configuring Multiprotocol BG P Extensions fo r IP Multicast IPC-348 Cisco IOS IP Configuration Guide In BGP , the only way to perform interdomain multicast routing was to use the BGP infrastructure that was in place for unicast routing.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-349 Cisco IOS IP Configuration Guid e Figure 61 Multicast BGP Envir onment Multiprotocol BGP Configuration Task List T o configure multip rotocol BGP , perform the follo wing tasks descri bed in the follo wing sections.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-350 Cisco IOS IP Configuration Guide Understanding NLRI Keywords and Address Families Multiprotocol BGP wa s introduced in Cisco IOS Re lease 11.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-351 Cisco IOS IP Configuration Guid e Note By default, neighbo rs that are def ined using the neighbor remote-as command in router configuration mo de exchange only unicast addres s pref ixes.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-352 Cisco IOS IP Configuration Guide Note Peer groups that are defi ned in router conf igurat ion mode using the neighbor peer -gr oup command exchange on ly unicast address pref ix es by def ault.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-353 Cisco IOS IP Configuration Guid e Configuring Route Maps for Multiprotocol BGP Prefixes T .
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-354 Cisco IOS IP Configuration Guide T o inject prefixes from a rout ing protocol into multip.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-355 Cisco IOS IP Configuration Guid e subject it to route m ap conditions. If you supply a route map, you can specify v arious match criteria options for the multi protocol BGP routes.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-356 Cisco IOS IP Configuration Guide Configuring a Multiprotocol BGP Route Reflector T o conf.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-357 Cisco IOS IP Configuration Guid e T o configure an aggre gate address for multiprotocol BG.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-358 Cisco IOS IP Configuration Guide Step 2 Enter the show ip bgp ipv4 multi cast summary EXEC command to display a summary of multicast database info rmation: Router# show ip bgp ipv4 multicast summary BGP router identifier 10.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-359 Cisco IOS IP Configuration Guid e • Multiprotocol BGP Peer Examples • Multiprotocol BG.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-360 Cisco IOS IP Configuration Guide Multiprotocol BGP Network Advertisement Examples The fol.
Configuring Multiprotocol BG P Extensions for IP Multicast Multiprotocol BGP Configuratio n Task List IPC-361 Cisco IOS IP Configuration Guid e Multiprotocol BGP Route Reflector Examples The follo wing e xample sho ws ho w to use an address famil y to conf igure internal BGP peer 10.
Configuring Multiprotocol BG P Extensions fo r IP Multicast Multiprotocol BGP Con figuration Task List IPC-362 Cisco IOS IP Configuration Guide.
IPC-363 Cisco IOS IP Configuration Guid e Configuring IP Routi ng Protocol-Independent Features This chapter describes ho w to configure IP routing protocol-i ndependent feat ures.
Configuring IP Routing Pr otocol-Inde pendent Features Using Variable-Length Su bnet Masks IPC-364 Cisco IOS IP Configuration Guide Using Variable-Length Subnet Masks Enhanced IGRP (EIGRP), Intermedia.
Configuring IP Routing Pr otocol-Independent Features Specifying De fault Routes IPC-365 Cisco IOS IP Configuration Guid e Static routes that point to an i nterface will be advertised via RIP , IGRP ,.
Configuring IP Routing Pr otocol-Inde pendent Features Changing the Maximum Nu mber of Paths IPC-366 Cisco IOS IP Configuration Guide T o def ine a static route to a network as the static default ro u.
Configuring IP Routing Pr otocol-Independent Features Redistributing Routing Information IPC-367 Cisco IOS IP Configuration Guid e protocols, the number of paths is controlled b y the maximum-paths r outer conf igurat ion command. The static route source can al ways install six path s.
Configuring IP Routing Pr otocol-Inde pendent Features Redistributing Routing Information IPC-368 Cisco IOS IP Configuration Guide One or more match commands and one or more set commands should follo w a r oute-map router confi guration command.
Configuring IP Routing Pr otocol-Independent Features Redistributing Routing Information IPC-369 Cisco IOS IP Configuration Guid e See the “BGP Route Map Examples” section in the “C onfiguring BGP” chapte r for examples of BGP route maps.
Configuring IP Routing Pr otocol-Inde pendent Features Filtering Routing Information IPC-370 Cisco IOS IP Configuration Guide • IGRP can automatically redistribute static ro utes and i nformation from other IG RP-routed autonomous systems. IGRP assigns static routes a metric that iden tif ies them as directly connecte d.
Configuring IP Routing Pr otocol-Independent Features Filtering Routing Information IPC-371 Cisco IOS IP Configuration Guid e Configuring Default Passive Interfaces In Internet service pro vider (ISP) and lar ge enterprise netwo rks, many of the d istrib ution routers ha ve more than 200 interfaces.
Configuring IP Routing Pr otocol-Inde pendent Features Filtering Routing Information IPC-372 Cisco IOS IP Configuration Guide Controlling the Advertising of Routes in Routing Updates T o pre v ent other routers fro m learning one or more routes, you can su ppress routes from being adv ertised in routing updates.
Configuring IP Routing Pr otocol-Independent Features Enabling Policy Routing (PBR) IPC-373 Cisco IOS IP Configuration Guid e For e xample, consider a router using I GRP and RIP . Suppose you trust the IGRP-deri v ed routing information more than the RIP-deri ved routing information.
Configuring IP Routing Pr otocol-Inde pendent Features Enabling Policy Routing (PBR) IPC-374 Cisco IOS IP Configuration Guide T o define th e criteria by whi ch pack ets are e xamined to learn if the y will be pol icy-ro uted, use either one or both of the fo llo wing commands in rout e-map conf igurat ion mode.
Configuring IP Routing Pr otocol-Independent Features Enabling Policy Routing (PBR) IPC-375 Cisco IOS IP Configuration Guid e The set commands can be used wi th each other . They are e v aluated in the ord er sho wn in the pre v ious task table. A usable next hop implies an interface.
Configuring IP Routing Pr otocol-Inde pendent Features Enabling Policy Routing (PBR) IPC-376 Cisco IOS IP Configuration Guide • The directly connected next hop must be a Cisco device with CDP enabled. • It is not supported for use in conjunction with dCEF , due to the dependency of the CDP neighbor database.
Configuring IP Routing Pr otocol-Independent Features Managing Authentication Keys IPC-377 Cisco IOS IP Configuration Guid e Enabling Local Policy Routing Packets that are generated b y the router are not no rmally polic y routed.
Configuring IP Routing Pr otocol-Inde pendent Features Monitoring and Main ta ining the IP Network IPC-378 Cisco IOS IP Configuration Guide Use the show k ey chain EX EC command to display ke y chai n information. F or ex amples of ke y management, see the “ K e y Management Examples ” section at the end o f this chapter .
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-379 Cisco IOS IP Configuration Guid e IP Routing Protocol-Indepen dent Configuration E.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-380 Cisco IOS IP Configuration Guide Overriding Static Routes with Dynamic Protocols Example In the follo wing example, pack ets for network 10.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-381 Cisco IOS IP Configuration Guid e Assigning adminis trati ve distances is a pro blem unique to each netw ork and is done in response t o the greatest perceived threats to the connected network.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-382 Cisco IOS IP Configuration Guide RIP and IGRP Redistribution Example Consider a W AN at a university that uses RIP as an i nterior routing protocol.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-383 Cisco IOS IP Configuration Guid e RIP and EIGRP Redistribution Examples This section pro vides a simple RIP redist rib ution ex ample and a comple x redistrib ution e xample between Enh anced IGRP (EIGRP) and B GP .
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-384 Cisco IOS IP Configuration Guide redistribute bgp 50000 OSPF Routing and Route Redistribution Examples OSPF typically requires coordinati on among man y internal routers, ABRs, and Autonomous System Boundary Routers (ASBRs).
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-385 Cisco IOS IP Configuration Guid e ! ! Ethernet interface 3 is in area 3: interface ethernet 3 ip address 172.18.10.5 255.255.255.0 ! ! Ethernet interface 4 is in area 0: interface ethernet 4 ip address 172.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-386 Cisco IOS IP Configuration Guide Figure 63 Ex ample OSPF A utonomous Syst em Netw.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-387 Cisco IOS IP Configuration Guid e Note It is not necessary to include def i nitions of al l areas in an OSPF aut onomous system in the configurat ion of all routers i n the autonomous system.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-388 Cisco IOS IP Configuration Guide router bgp 50000 network 192.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-389 Cisco IOS IP Configuration Guid e interface ethernet 0 ip address 192.168.110.201 255.255.255.0 ip ospf authentication-key abcdefgh ip ospf cost 10 ! interface ethernet 1 ip address 172.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-390 Cisco IOS IP Configuration Guide Default Metric Values Redistribution Example The follo wing example sho ws a router in a utonomous system 1 using both RIP and IGRP .
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-391 Cisco IOS IP Configuration Guid e redistribute iso-igrp nsfnet route-map 3 ! route.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-392 Cisco IOS IP Configuration Guide See more route map examples in the “BGP Route Map Examples” and “BGP Community with Route Maps Examples” sections of the 12.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-393 Cisco IOS IP Configuration Guid e The passi ve-interface router conf iguration co mmand is typically used when the wildcard speci fi cation on the network router config uration command conf igures more interfaces than is desirable.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-394 Cisco IOS IP Configuration Guide interface async 1 ip policy route-map equal-access ! route-map equal-access permit 10 match ip address 1 set ip default next-hop 172.
Configuring IP Routing Pr otocol-Independent Features IP Routing Protocol-Indepen dent Configuration Examples IPC-395 Cisco IOS IP Configuration Guid e interface Fddi0 ip address 10.1.1.1 255.255.255.0 no keepalive ! interface Fddi1 ip address 172.16.
Configuring IP Routing Pr otocol-Inde pendent Features IP Routing Protocol-Ind ependent Configuration Examples IPC-396 Cisco IOS IP Configuration Guide.
IP Multicast.
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IPC-399 Cisco IOS IP Configuration Guide Configuring IP Multicast Routing This chapter describes ho w to configure IP multicast rou ting. For a comp lete description of the IP multicast routing commands in this chapter , refer to the “IP Multicast Routing Commands” chapter of the Cisco IOS IP Command Refer ence, V olu me 3 of 3: Multicast .
Configuring IP Multicast Routing The Cisco IP Multicast Routing Implementation IPC-400 Cisco IOS IP Configuration Guide The Cisco IP Multicast Routing Implementation The Cisco IOS software supports th.
Configuring IP Multicast Routing The Cisco IP Multicast Routing Implementation IPC-401 Cisco IOS IP Configuration Guid e Multicast addresses in the range 2 24.0.0.0 to 224.0.0.2 55 are reserved for use by routi ng protocols and other network co ntrol traf f ic.
Configuring IP Multicast Routing Basic IP Multicast Routing Configuration Task List IPC-402 Cisco IOS IP Configuration Guide PIM can operate in dense mode or sp arse mode. It is possible for the ro uter to handle both spar se groups and dense groups at the same time.
Configuring IP Multicast Routing Enabling IP Mu lticast Routing IPC-403 Cisco IOS IP Configuration Guid e • Config uring IP Multi cast ov er A TM Point-to-Multipoint V irtual Circuits (Optional) •.
Configuring IP Multicast Routing Enabling PIM on an Interface IPC-404 Cisco IOS IP Configuration Guide See the “ PIM Dense Mode Example ” section later in this chapter for an e xample of ho w to configure a PIM interface in dense mode.
Configuring IP Multicast Routing Enabling PIM on an Interface IPC-405 Cisco IOS IP Configuration Guid e Configuring PIM Dense Mode State Refresh If you ha ve PIM dense mode (PI M-DM) enabled on a rou ter interface, the P IM Dense Mode State Refresh feature is enabled by default.
Configuring IP Multicast Routing Configuring Auto- RP IPC-406 Cisco IOS IP Configuration Guide Configuring a Rendezvous Point If you conf igure PIM to operate in sp arse mode, you must also cho ose one or more routers to be rendezv ous points (RPs). Y ou need not config ure the routers to be RPs; the y learn ho w to become RPs themselves.
Configuring IP Multicast Routing Configuring Auto-RP IPC-407 Cisco IOS IP Configuration Guid e Setting Up Auto-RP in a New Internetwork If you are settin g up Auto-RP in a ne w internetw ork, you do not need a defa ult RP because you conf igure all the interfaces for sparse-d ense mode.
Configuring IP Multicast Routing Configuring Auto- RP IPC-408 Cisco IOS IP Configuration Guide Find a router whose connecti vity is not likely to be interrupted an d assign it the role of RP-mapping agent. All routers within time-to-li v e (TTL) number of hops from the source router recei v e the Auto-RP discove ry messages.
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-409 Cisco IOS IP Configuration Guid e IGMP Features Configuration Task List T o conf igure IGMP features, perform the tasks described in the fol lo wing sections. The tasks in the f irst section are required; t he tasks in the remaining sections are optio nal.
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-410 Cisco IOS IP Configuration Guide Changing the IGMP Version By default, th e router uses I GMP V ersion 2 (IGMPv2 ), which allo w s such features as the IGMP query timeout and the maximu m query response time.
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-411 Cisco IOS IP Configuration Guid e Routers That Run IGMP Version 2 IGMPv2 impro ved the q uery messaging capabilities of IGMPv1. The query and membership report me ssages in IGMPv2 are identical to the IGMPv1 messages with tw o exceptio ns.
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-412 Cisco IOS IP Configuration Guide IGMPv3 is the industry -designated standard protocol for hosts to sign al channel subscriptions i n Source Specif ic Multicast (SSM).
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-413 Cisco IOS IP Configuration Guid e If IGMPv3 is needed to support SSM, then you ha v e two conf igurat ion alternati v es as follo ws: • Config ure only the interf ace for IGMPv2 and use IGMP v 3lite and URD.
Configuring IP Multicast Routing IGMP Features Configuration Task List IPC-414 Cisco IOS IP Configuration Guide Configuring IGMP Leave Latency In IGMPv2 and IGMPv3, hosts send IGMP messages to indicate that they do not wish to recei ve a particular group , source, or channel an y more.
Configuring IP Multicast Routing Configuring the TTL Threshold IPC-415 Cisco IOS IP Configuration Guid e Configuring the TTL Threshold The TTL value contr ols whether packets are forwarde d out of an interf ace.
Configuring IP Multicast Routing Enabling the Functio nal Address for IP Multicast over Token Ring L ANs IPC-416 Cisco IOS IP Configuration Guide properties (for ex ample, cont act informat ion, sessi.
Configuring IP Multicast Routing Configuring PIM Version 2 IPC-417 Cisco IOS IP Configuration Guid e If you conf igure this feature, IP multicast trans missions o ver T oken Ring interfaces are more ef ficient than they formerly were.
Configuring IP Multicast Routing Configuring PIM Version 2 IPC-418 Cisco IOS IP Configuration Guide The Cisco PIM V ersion 2 implementation allo ws inte roperability and transition between V ersion 1 and V ersion 2, although there might be some minor problems.
Configuring IP Multicast Routing Configuring PIM Version 2 IPC-419 Cisco IOS IP Configuration Guid e Specifying the PIM Version All systems using Cisco IOS Release 11.
Configuring IP Multicast Routing Configuring PIM Version 2 IPC-420 Cisco IOS IP Configuration Guide T o pre vent BSR messages from being sent or receive d throu gh an interface, use the follo wing com.
Configuring IP Multicast Routing Configuring PIM Version 2 IPC-421 Cisco IOS IP Configuration Guid e Note The Cisco IOS implementation of PIM BSR uses the v alue 0 as the def ault priority for candidate RPs and BSRs.
Configuring IP Multicast Routing Advanced PIM Features Configuration Task List IPC-422 Cisco IOS IP Configuration Guide Dense Mode Dense mode groups in a mix ed V ersion 1/V ersion 2 re gion need no special conf iguration; th ey will interoperate automatically .
Configuring IP Multicast Routing Advanced PIM Features Con figuration Task List IPC-423 Cisco IOS IP Configuration Guid e Understanding PIM Shared Tree a nd Source Tree (Shortest-Path Tree) By default, memb ers of a group recei ve data from se nders to the group acr oss a single data distrib ution tree rooted at the RP .
Configuring IP Multicast Routing Advanced PIM Features Configuration Task List IPC-424 Cisco IOS IP Configuration Guide Understanding Reverse Path Forwarding Re verse P ath Forwarding (RPF) is an algorithm used for forwarding multicast datagram s.
Configuring IP Multicast Routing Advanced PIM Features Con figuration Task List IPC-425 Cisco IOS IP Configuration Guid e Assigning an RP to Multicast Groups If you ha ve co nf igured PIM sparse mode, you must conf igure a PIM RP for a multicast gr oup.
Configuring IP Multicast Routing Advanced PIM Features Configuration Task List IPC-426 Cisco IOS IP Configuration Guide Understanding the PIM Registering Process IP multicast sources do not use a signalling mech anis m to announ ce their presence.
Configuring IP Multicast Routing Advanced PIM Features Con figuration Task List IPC-427 Cisco IOS IP Configuration Guid e Limiting the Rate of PIM Register Messages T o set a limit on the maximum numb.
Configuring IP Multicast Routing Advanced PIM Features Configuration Task List IPC-428 Cisco IOS IP Configuration Guide For traf fic from D VMRP neighbors, proxy regist ering is alw ays acti ve and cannot be influenced b y the ip pim dense-mode proxy- register i nterface conf igurat ion command.
Configuring IP Multicast Routing Configuring an IP Multicast Static Route IPC-429 Cisco IOS IP Configuration Guid e Configuring an IP Multicast Static Route IP multicast static routes (mro utes) allo w you to ha ve multicast paths di verge fr om the unicast paths.
Configuring IP Multicast Routing Controlling the Transmission Rate to a Multicast Group IPC-430 Cisco IOS IP Configuration Guide A multicast static route allo ws you to use the configu ration in Figure 68 b y conf iguring a stat ic multicast source. The Cisco IOS softw are uses the conf igurati on info rmation instead of the unicast rou ting table.
Configuring IP Multicast Routing Configuring RTP Header Compression IPC-431 Cisco IOS IP Configuration Guid e Figur e 70 RTP Header Compr ession The R TP header compression feature compresses the IP/UD P/R TP header in an R TP data packet from 40 bytes to appr oximately 2 to 5 b ytes, as sho wn in Figure 70 .
Configuring IP Multicast Routing Configuring RTP H eader Compressio n IPC-432 Cisco IOS IP Configuration Guide Enabling RTP Header Compression on a Serial Interface T o enable R TP header compression .
Configuring IP Multicast Routing Configuring RTP Header Compression IPC-433 Cisco IOS IP Configuration Guid e By default, for PPP or HDLC encapsulation, the software allo ws 32 R TP header compression connectio ns (16 calls). This defa ult can be increased to a maximu m of 1000 R TP header compression connections on an interface.
Configuring IP Multicast Routing Configuring IP Multicast over ATM Point-to-Multipoint Virtual Circuits IPC-434 Cisco IOS IP Configuration Guide In order for the Express R TP Header Compression feature t o work, the f ollo wing conditions must exi st: • CEF switching or f ast switching must be enabled on the interface.
Configuring IP Multicast Routing Configuring IP Multicast over ATM Point- to-Multipoint Virtual Circuits IPC-435 Cisco IOS IP Configuration Guid e Figure 71 Environment f or IP Mult icast ov er A TM Point-to-Multipoint V C s W ith the ad vent of IP mul ticast, where high-rate multica st traf f ic can occur , that approach does not scale.
Configuring IP Multicast Routing Configuring IP Multicast over ATM Point-to-Multipoint Virtual Circuits IPC-436 Cisco IOS IP Configuration Guide Y o u must ha v e A TM configured for multip oint signalling.
Configuring IP Multicast Routing Configuring IP Multicast over ATM Point- to-Multipoint Virtual Circuits IPC-437 Cisco IOS IP Configuration Guid e Idling Policy An idling polic y uses the ip pim vc-count number interface conf iguration command to limit the number of VCs created by PIM.
Configuring IP Multicast Routing Configuring an IP Multicast Boundary IPC-438 Cisco IOS IP Configuration Guide Configuring an IP Multicast Boundary Y ou can set up an administ rati vely sco ped boundary on an interf ace for multicast grou p addresses.
Configuring IP Multicast Routing Storing IP Multicast Headers IPC-439 Cisco IOS IP Configuration Guid e T o conf igure an intermediate IP multicast helper , the f irst hop router and the last hop router must be confi gured.
Configuring IP Multicast Routing Enabling CGMP IPC-440 Cisco IOS IP Configuration Guide T o allocate a circular buf fer to store IP multicas t packet headers that the router recei ves, use the follo w.
Configuring IP Multicast Routing Load Splitting IP Multicast Traffic Across Equal-Cost Paths Configuration Task List IPC-441 Cisco IOS IP Configuration Guid e Stub IP multicast rou ting allo ws stub s.
Configuring IP Multicast Routing Load Splitting IP Multicast Traffic Across Equ al-Cost Paths Config uration Task List IPC-442 Cisco IOS IP Configuration Guide Enabling Native Load Splitting If two or more equal-cost paths from a source are av ailable, unicast tra f f ic will be load split acro ss those paths.
Configuring IP Multicast Routing Load Splitting IP Multicast Traffic Across Equal-Cost Paths Configuration Task List IPC-443 Cisco IOS IP Configuration Guid e If a tunnel is con figured between Router.
Configuring IP Multicast Routing Load Splitting IP Multicast Traffic Across Equ al-Cost Paths Config uration Task List IPC-444 Cisco IOS IP Configuration Guide Configuring Both Routers to RPF Because .
Configuring IP Multicast Routing Monitoring and Maintaining IP Multica st Routing Configuration T ask List IPC-445 Cisco IOS IP Configuration Guid e Verifying the Load Splitting Load splitting w orks for both f ast switching an d process switching, b ut splitt ing the traf fic among the physical interfaces is perform ed differently for each case.
Configuring IP Multicast Routing Monitoring and Maintaining IP Multi cast Routing Configuration Task List IPC-446 Cisco IOS IP Configuration Guide Clearing Caches, Tables, and Databases Y ou can remov e all contents of a particular cache, tabl e, or database.
Configuring IP Multicast Routing Monitoring and Maintaining IP Multica st Routing Configuration T ask List IPC-447 Cisco IOS IP Configuration Guid e Using IP Multicast Heartbeat The IP multicast heartb eat feature enables y ou to monitor the deli v ery of IP multi cast packets and to be alerted if the deli very fails to meet certai n parameters.
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-448 Cisco IOS IP Configuration Guide IP Multicast Configuration Examples This section pro vides the follo wing IP mu lticast ro.
Configuring IP Multicast Routing IP Multicast Config uration Examples IPC-449 Cisco IOS IP Configuration Guid e PIM Dense Mode State Refresh Example The follo wing e xample sho ws a PIM router that is.
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-450 Cisco IOS IP Configuration Guide ip pim sparse-dense-mode ! router ospf 1 network 172.21.24.8 0.0.0.7 area 1 network 172.21.24.16 0.0.0.7 area 1 ! ip pim bsr-candidate Ethernet2 30 10 ip pim rp-candidate Ethernet2 group-list 5 access-list 5 permit 239.
Configuring IP Multicast Routing IP Multicast Config uration Examples IPC-451 Cisco IOS IP Configuration Guid e Inconsistent candidate RP selection b etween Cisc o and non-Ci sco RFC 2362-compli ant routers in the same domain if multiple candidate RPs with part ia lly o verlappi ng group address ranges are co nf igured can occur .
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-452 Cisco IOS IP Configuration Guide no keepalive clockrate 64000 frame-relay map ip 1.
Configuring IP Multicast Routing IP Multicast Config uration Examples IPC-453 Cisco IOS IP Configuration Guid e no ip route-cache shutdown clockrate 2015232 ! ip default-gateway 9.1.72.1 ip classless ip route 0.0.0.0 0.0.0.0 9.1.72.1 ! router igrp 1 network 15.
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-454 Cisco IOS IP Configuration Guide ! interface Serial4/0 ip address 15.3.0.1 255.
Configuring IP Multicast Routing IP Multicast Config uration Examples IPC-455 Cisco IOS IP Configuration Guid e atm nsap-address 47.00918100000000410B0A1981.333333333333.00 atm pvc 1 0 5 qsaal atm pvc 2 0 16 ilmi atm multipoint-signalling map-group mpvc router ospf 9 network 171.
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-456 Cisco IOS IP Configuration Guide The configurations for Router A and Router C are as follows: Router A—First Hop Router Configuration interface ethernet 0 ip directed-broadcast ip multicast helper-map broadcast 224.
Configuring IP Multicast Routing IP Multicast Config uration Examples IPC-457 Cisco IOS IP Configuration Guid e Router B Configuration ip multicast-routing ip pim dense-mode : or ip pim sparse-mode ip pim neighbor-filter 1 access-list 1 deny 10.
Configuring IP Multicast Routing IP Multicast Configuration Examples IPC-458 Cisco IOS IP Configuration Guide ip address 100.1.3.3 255.255.255.0 bandwidth 125 clock rate 125000 IP Multicast Heartbeat Example The follo wing e xample sho ws ho w to monitor IP multicast packets forw arded through this router to group address 244.
IPC-459 Cisco IOS IP Configuration Guide Configuring Source Specific Multicast This chapter describe s how to conf igure Source Specific Multicast (SSM ). For a complete description of the SSM commands in this chapter , refer to the “IP Multicast Routi ng Commands” chap ter of the Cisc o IOS IP Command Refer ence, V olume 3 of 3: Mult icast .
Configuring Source Spe cific Multicast How SSM Differs from In ternet Standard Multicast IPC-460 Cisco IOS IP Configuration Guide deploy recei v er applications that are not yet SSM enabled (thr ough support for IGMPv3 ).
Configuring Sour ce Specific Multicast IGMPv3 Host Signalling IPC-461 Cisco IOS IP Configuration Guid e If SSM is deploy ed in a netw ork already conf igured for P IM-SM (Cisco IOS Release 12.0 or later releases is recommended), then only the last hop routers must be upgraded to a Cisco IOS software image that support s SSM.
Configuring Source Spe cific Multicast URD Host Signalling IPC-462 Cisco IOS IP Configuration Guide Applications must be compiled wi th the Host Side IGMP Library (HSIL) for IGMP v3lite. This softwa re provides applications with a subset of the IGMPv3 applications pr ogramming interface (A PI) that is required to write SSM applications.
Configuring Sour ce Specific Multicast URD Host Signalling IPC-463 Cisco IOS IP Configuration Guid e When the bro wser of a host encoun ters a URD intercept URL, it will try to open a TCP connection to the web server on port 465.
Configuring Source Spe cific Multicast Benefits IPC-464 Cisco IOS IP Configuration Guide Because the router returns a Conten t-T y pe of text and HTML, the best way to include the URD intercept URL into a web page is to use a frame. By def ining the size of the frame, you can also hide the URD intercept URL on the displayed page.
Configuring Sour ce Specific Multicast Restrictio ns IPC-465 Cisco IOS IP Configuration Guid e deployment. Anothe r factor that cont ribut es to the ease of installation of SSM is t he fact that it can le verage pr eexisting PIM-SM network s and requires only the up grade of last hop routers to support IGMPv3, IGMP v3lite, or URD.
Configuring Source Spe cific Multicast Restrictions IPC-466 Cisco IOS IP Configuration Guide receiv ers will recei ve all (S, G) channel traf fic (and f ilter out the u nwanted traf fic on input).
Configuring Sour ce Specific Multicast SSM Configura tion Task List IPC-467 Cisco IOS IP Configuration Guid e compiled with the HSIL wi ll then dynamically b ind to the ne west ve rsion of the HSIL, which sho uld support the che ck for IGMPv3 in t he operating system kernel.
Configuring Source Spe cific Multicast SSM Configuration Examples IPC-468 Cisco IOS IP Configuration Guide SSM Configuration Examples This section provides the follo wing SSM con fig uration e xamples.
Configuring Sour ce Specific Multicast SSM Configuration Examples IPC-469 Cisco IOS IP Configuration Guid e ip pim accept-register list no-ssm-range ip access-list extended msdp-nono-list deny ip any 232.0.0.0 0.255.255.255 ! SSM Range ! . ! . ! . ! See ftp://ftpeng.
Configuring Source Spe cific Multicast SSM Configuration Examples IPC-470 Cisco IOS IP Configuration Guide.
IPC-471 Cisco IOS IP Configuration Guide Configuring Bidirectional PIM This chapter describe s how to conf igure the Bidire ctional PIM (bidir-PIM) feature. Bidir -PIM is a v ariant of the Protocol Independent Multi cast (PIM) suite o f routing protocol s for IP multicast and is an extension o f the ex isting PIM sparse mo de (PIM-SM) feature.
Configuring Bidirectional PIM Bidir-PIM Ov erview IPC-472 Cisco IOS IP Configuration Guide Membership to a bidirect ional group is signalled via e xplicit join m essages. T raf f ic from sources i s unconditional ly sent up the shared tree to w ard the RP and passed do wn the tree to ward the recei vers on each branch of the tree.
Configuring Bidirectional PIM Bidir-PIM Overview IPC-473 Cisco IOS IP Configuration Guid e Figure 77 Bidirectional Shar ed T ree When packets are forwarded do wnst ream from the RP to ward recei v ers, there are no fundamental dif ferences between bidir -PIM and PIM-SM.
Configuring Bidirectional PIM Bidir-PIM Configuration Task List IPC-474 Cisco IOS IP Configuration Guide Bidirectional Group Tree Building The procedure for joining the shared tree o f a bidirectional group is almost id entical to that used in PIM SM.
Configuring Bidirectional PIM Bidir-PIM Configuration Task List IPC-475 Cisco IOS IP Configuration Guid e Configuring Bidir-PIM Most of the configuration requirements for bidir-PI M are the same as those fo r configuring PIM-SM. You need not enable or disable an interface for carrying traffic fo r multicast groups in bidirectional mode.
Configuring Bidirectional PIM Bidir-PIM Configuration E xample IPC-476 Cisco IOS IP Configuration Guide Monitoring and Maintaining Bidir-PIM T o display bidir-PI M information, use the foll o wing commands in EXEC mode, as needed: Bidir-PIM Configuration Example By default a bidirecti onal RP advertises all gr oups as bidirectional.
IPC-477 Cisco IOS IP Configuration Guide Configuring Multicast Source Discovery Protocol This chapter describes the Multicast Source Discove ry Protocol (MSDP) feature.
Configuring Multicast Source Discovery Protocol How MSDP Works IPC-478 Cisco IOS IP Configuration Guide and the address or the originator ID of the RP , if configured. If the p eer is an RP and has a member of that multicast group, the data pack et is decapsulated and forwarded do wn the shared-tr ee in the remote domain.
Configuring Multicast So urce Discovery Protocol Benefits IPC-479 Cisco IOS IP Configuration Guid e Benefits MSDP has the follo wing benef its: • It breaks up the shared multicas t distribut ion tree. Y ou can make the shared tree local to your domain.
Configuring Multicast Source Discovery Protocol MSDP Configuration Task List IPC-480 Cisco IOS IP Configuration Guide Configuring an MSDP Peer Y ou enable MSD P by configuring an MSDP peer to the local router .
Configuring Multicast So urce Discovery Protocol MSDP Config uration Task List IPC-481 Cisco IOS IP Configuration Guid e Requesting Source Information from an MSDP Peer Local RPs can send SA requests and get immediate re sponse for all active sources for a gi ven group.
Configuring Multicast Source Discovery Protocol MSDP Configuration Task List IPC-482 Cisco IOS IP Configuration Guide T o further restrict which registered sources are adv ertised, use the f ollo wing command in g lobal configuration mode. The access list or auton omous system path access li st determines whic h (S, G) pairs are advertised.
Configuring Multicast So urce Discovery Protocol MSDP Config uration Task List IPC-483 Cisco IOS IP Configuration Guid e T o apply an MSDP filter , use the follo wing comma nds i n global configur ati.
Configuring Multicast Source Discovery Protocol MSDP Configuration Task List IPC-484 Cisco IOS IP Configuration Guide Configuring a Default MSDP Peer An MSDP peer of the local ro uter is probably a BGP peer also.
Configuring Multicast So urce Discovery Protocol MSDP Config uration Task List IPC-485 Cisco IOS IP Configuration Guid e If you specify a prefix list, the peer will be a default peer only for t he prefi xes in the li st. Y ou can have multiple activ e default peers when you ha ve a pref ix list associated with each.
Configuring Multicast Source Discovery Protocol MSDP Configuration Task List IPC-486 Cisco IOS IP Configuration Guide Including a Bordering PIM Dense Mode Region in MSDP Y o u might hav e a router that b orders a PIM-SM re gion with a den se mode re gion.
Configuring Multicast So urce Discovery Protocol Monitoring and Ma intaining MS DP IPC-487 Cisco IOS IP Configuration Guid e Monitoring and Maintaining MSDP T o monitor MSDP SA messages, peers, state,.
Configuring Multicast Source Discovery Protocol MSDP Configuration Examples IPC-488 Cisco IOS IP Configuration Guide MSDP Configuration Examples This section contains the followi ng MSDP conf iguratio.
Configuring Multicast So urce Discovery Protocol MSDP Configuration Examples IPC-489 Cisco IOS IP Configuration Guid e Figur e 80 Logical RP Using MSDP RouterA Configuration ! hostname RouterA ! ip routing ! ip subnet-zero ip multicast-routing ! ! interface Loopback0 ip address 192.
Configuring Multicast Source Discovery Protocol MSDP Configuration Examples IPC-490 Cisco IOS IP Configuration Guide ip address 171.69.2.2 255.255.255.0 ip pim sparse-dense-mode no shutdown ! interface Ethernet4/0/0 description LANethernet3 ip address 171.
Configuring Multicast So urce Discovery Protocol MSDP Configuration Examples IPC-491 Cisco IOS IP Configuration Guid e no shutdown ! interface Loopback10 ip address 10.10.10.10 255.255.255.255 ip pim sparse-dense-mode no shutdown ! interface Ethernet2 description LANethernet 0 ip address 171.
Configuring Multicast Source Discovery Protocol MSDP Configuration Examples IPC-492 Cisco IOS IP Configuration Guide interface Loopback0 ip address 192.168.1.6 255.255.255.255 no shutdown ! interface Ethernet2 description LANethernet 3 ip address 171.
IPC-493 Cisco IOS IP Configuration Guide Configuring PGM Host and Router Assist Note Support for the PGM Host featur e has been remov ed. Use of th is feature is not recommende d.
Configuring PGM Host and Rout er Assist PGM Overview IPC-494 Cisco IOS IP Configuration Guide Note PGM contains an element that assist s router s and switches in handl ing PGM transport data as it flo ws through a ne twork. Unlike the Rout er Assist eleme nt, the Host el ement does not hav e a current practica l applicatio n.
Configuring PGM Host and Router Assist PGM Host Config uration Task List IPC-495 Cisco IOS IP Configuration Guid e PGM Host Configuration Task List Note Support for the PGM Host featur e has been remov ed. Use of th is feature is not recommende d. T o configure PGM Host, perfo rm the tasks descr ibed in the follo wing section s.
Configuring PGM Host and Rout er Assist PGM Host Configuration Task List IPC-496 Cisco IOS IP Configuration Guide Enabling PGM Host with a Virtual Host Interface T o enable PGM Host globally on the ro.
Configuring PGM Host and Router Assist PGM Host Config uration Task List IPC-497 Cisco IOS IP Configuration Guid e 2 9CD72EF099FA 1025 source conn 48059 224.
Configuring PGM Host and Rout er Assist PGM Router Assist Conf iguration Task List IPC-498 Cisco IOS IP Configuration Guide packets received in error 0 valid bytes received 0 Total valid bytes receive.
Configuring PGM Host and Router Assist Monitoring and Maintaining PGM Host and Router Assist IPC-499 Cisco IOS IP Configuration Guid e Enabling PGM Router Assist w ith a Virtual Host Interface T o ena.
Configuring PGM Host and Rout er Assist PGM Host and Router Assist Configura tion Examples IPC-500 Cisco IOS IP Configuration Guide T o enable PGM Host debugging, use the follo wing command in privile.
Configuring PGM Host and Router Assist PGM Host and Ro uter Assi st Configuration Examples IPC-501 Cisco IOS IP Configuration Guid e Note For clarity , extraneous informatio n has been omitted from the e xamples in the follo wing sect ions. PGM Host with a Virtual Interface Example Note Support for the PGM Host featur e has been remov ed.
Configuring PGM Host and Rout er Assist PGM Host and Router Assist Configura tion Examples IPC-502 Cisco IOS IP Configuration Guide no ip directed-broadcast no ip mroute-cache media-type 10BaseT interface ethernet2 ip address 10.
Configuring PGM Host and Router Assist PGM Host and Ro uter Assi st Configuration Examples IPC-503 Cisco IOS IP Configuration Guid e interface ethernet2 ip address 10.
Configuring PGM Host and Rout er Assist PGM Host and Router Assist Configura tion Examples IPC-504 Cisco IOS IP Configuration Guide.
IPC-505 Cisco IOS IP Configuration Guide Configuring Unidirectional Link Routing This chapter describes t he unidirectional l ink routin g (UDLR) feature.
Configuring Unid irectional Link Routing UDLR Overv iew IPC-506 Cisco IOS IP Configuration Guide UDLR enables a router to emulate the beha vior of a bidi rectional link f or IP operations ov er UDLs.
Configuring Unidirectional Link Routing UDLR Overview IPC-507 Cisco IOS IP Configuration Guid e In a lar ge enterprise netwo rk, it is not possible t o be able to recei v e IP multicast traf f ic via satellite and forward the traf f ic throughout the network.
Configuring Unid irectional Link Routing UDLR Tunnel Configuratio n Task List IPC-508 Cisco IOS IP Configuration Guide In the scenario in Figure 82 , the follo wing sequence of ev ents occurs: 1. User 1 joins multicast grou p G. 2. Router C sends a Protocol Independent Multi cast (PIM) join message hop-b y-hop to the rendezv ous point (Router B).
Configuring Unidirectional Link Routing UDLR Tunnel Configuration Task List IPC-509 Cisco IOS IP Configuration Guid e • On the upstream ro uter , where the UDL can o nly se nd, you must configure th e tunnel to rece i ve.
Configuring Unid irectional Link Routing IGMP UDLR Configuration Task List IPC-510 Cisco IOS IP Configuration Guide IGMP UDLR Configuration Task List T o conf igure IGMP UDLR, perform the tasks described in the follo wing sections. Th e tasks in the f irst section are required; t he tasks in the remaining sections are optio nal.
Configuring Unidirectional Link Routing IGMP Proxy Configuration Task List IPC-511 Cisco IOS IP Configuration Guid e See the “IGMP UDLR Example” section later in t his chapter fo r an example o f ho w to conf igure IGMP UDLR.
Configuring Unid irectional Link Routing IGMP Proxy Configuration Task List IPC-512 Cisco IOS IP Configuration Guide Prerequisites Before conf iguring IGMP Proxy , ensure that the follo wing conditi ons exist: • All routers on the UDL have the same subnet address.
Configuring Unidirectional Link Routing UDLR Configuration Examp les IPC-513 Cisco IOS IP Configuration Guid e UDLR Configuration Examples This section provides the follo wing UDLR examples: • UDLR .
Configuring Unid irectional Link Routing UDLR Configuration Examples IPC-514 Cisco IOS IP Configuration Guide tunnel udlr receive-only serial 0 ! ! Configure OSPF.
Configuring Unidirectional Link Routing UDLR Configuration Examp les IPC-515 Cisco IOS IP Configuration Guid e Figur e 84 IGMP Unidir ection al Link Routing E xample Uplink Router (uplink-rtr) Configu.
Configuring Unid irectional Link Routing UDLR Configuration Examples IPC-516 Cisco IOS IP Configuration Guide ! helpered for the unidirectional interface. ! interface ethernet 0 description Typical IP multicast-enabled interface ip address 14.0.0.2 255.
Configuring Unidirectional Link Routing UDLR Configuration Examp les IPC-517 Cisco IOS IP Configuration Guid e Figure 85 IGMP Mroute Pr o xy T opology Router A Configuration interface ethernet 0 ip address 10.1.1.1 255.255.255.0 ip pim dense-mode ! interface ethernet 1 ip address 10.
Configuring Unid irectional Link Routing UDLR Configuration Examples IPC-518 Cisco IOS IP Configuration Guide ! interface ethernet 1 ip address 10.5.1.1 255.255.255.0 ip pim sparse-mode ip igmp mroute-proxy loopback 0 ! interface ethernet 2 ip address 10.
Configuring Unidirectional Link Routing UDLR Configuration Examp les IPC-519 Cisco IOS IP Configuration Guid e no ip directed-broadcast ip pim dense-mode ip nhrp network-id 5 ip nhrp server-only ip igmp unidirectional-link fair-queue 64 256 31 ip rsvp bandwidth 1000 100 ! router ospf 1 network 9.
Configuring Unid irectional Link Routing UDLR Configuration Examples IPC-520 Cisco IOS IP Configuration Guide no keepalive no cdp enable ! router ospf 1 network 9.1.90.0 0.0.0.255 area 1 network 9.1.92.96 0.0.0.15 area 1 ! ip classless ip route 0.0.0.
IPC-521 Cisco IOS IP Configuration Guide Using IP Multicast Tools This chapter describes IP mult icast tools that allo w you to trace a multicast path or test a multicast en viron ment.
Using IP Multicast Tools MRM Configuratio n Task List IPC-522 Cisco IOS IP Configuration Guide • Can verify a multicast en vironment prior to an e v ent—Y ou need not wait for real multi cast traf f ic to fail in or der to fin d out that a problem e xists.
Using IP Multicast Tools MRM Configura tion Task List IPC-523 Cisco IOS IP Configuration Guid e Monitoring Multiple Groups If you ha ve more than one multicast gro up to monitor , you could conf igure an interf ace that is a T est Sender for one group and a T est Receiv er for another group.
Using IP Multicast Tools MRM Configuratio n Task List IPC-524 Cisco IOS IP Configuration Guide Configuring a Manager T o configure a router as a Manage r in order for MRM to function , use the follo wing commands beginni ng in global co nf iguration mode.
Using IP Multicast Tools Monitoring IP Multicast Routing IPC-525 Cisco IOS IP Configuration Guid e When the test begins, the Manager sends a unicast cont rol packet to the T est Se nder and T est Receiver , and then the Manager starts sending beacons.
Using IP Multicast Tools MRM Configuration E xample IPC-526 Cisco IOS IP Configuration Guide MRM Configuration Example Figure 87 illustrates a T est Sende r , a T est R ecei ver , an d a Ma nager in an MRM en vi ronment. The partia l configurations for the three de vices follow the f igure.
IPC-527 Cisco IOS IP Configuration Guide Configuring Router-Port Group Management Protocol This chapter describes the Rout er -Port Group Management Pro tocol (RGMP). RGMP is a Cisco protocol that restricts IP multicast traf fic in switched networks .
Configuring Route r-Port Group Managemen t Protocol RGMP Overview IPC-528 Cisco IOS IP Configuration Guide Figure 88 sho ws where these protocols operate within the IP multicast en vironment. Figure 88 IP Multicast Routi ng Prot ocols Note CGMP and RGMP cannot interoperate on the same switched network.
Configuring Router-Po rt Group Manag ement Protocol RGMP Overview IPC-529 Cisco IOS IP Configuration Guid e Figur e 89 RGMP in a Switc hed Netw or k In Figure 89 , the sources for the t wo dif feren t multicast groups (the so urce for group A and the source for group B) send traf f ic into the same switched netw ork.
Configuring Route r-Port Group Managemen t Protocol RGMP Overview IPC-530 Cisco IOS IP Configuration Guide Figure 90 RGMP Messag es The router sends si multaneous PIM hello ( or a PIM query message if PIM V ersion 1 is configured) and RGMP hello messages to the switch.
Configuring Router-Po rt Group Manag ement Protocol RGMP Configur ation Task List IPC-531 Cisco IOS IP Configuration Guid e Note An RGMP-enabled router cannot send an RGMP lea v e <G> message un.
Configuring Route r-Port Group Managemen t Protocol RGMP Configuration Task List IPC-532 Cisco IOS IP Configuration Guide Enabling RGMP T o enable RGMP , use the follow ing commands on all routers in .
Configuring Router-Po rt Group Manag ement Protocol Monitoring and Ma intaining RGMP IPC-533 Cisco IOS IP Configuration Guid e Monitoring and Maintaining RGMP T o enable RGMP deb ugging, use the follo.
Configuring Route r-Port Group Managemen t Protocol RGMP Configuration Example IPC-534 Cisco IOS IP Configuration Guide RGMP Configuration Example This section prov ides an RGMP conf iguration e xample that sho ws the individual con figurati ons for the routers and switches shown in Figure 92 .
Configuring Router-Po rt Group Manag ement Protocol RGMP Configuration Example IPC-535 Cisco IOS IP Configuration Guid e no shutdown Router C Configuration ip routing ip multicast-routing interface ethernet 1/0 ip address 10.4.0.1 255.0.0.0 ip pim sparse-dense-mode no shutdown interface ethernet 1/1 ip address 10.
Configuring Route r-Port Group Managemen t Protocol RGMP Configuration Example IPC-536 Cisco IOS IP Configuration Guide.
IPC-537 Cisco IOS IP Configuration Guide Configuring DVMRP Interoperability This chapter describes the Distance V ector Mu lt icast Routing Protocol (D VMRP) Interoperability feature.
Configuring DVMRP In teroperability Basic DVMRP Interoperability Configuration Tas k List IPC-538 Cisco IOS IP Configuration Guide Configuring DVMRP Interoperability Cisco multicast routers using PIM can interoperate with non- Cisco multicast routers that use the DV M R P .
Configuring DVMRP Interoperability Basic DVMRP Interoperabilit y Configurati on Task List IPC-539 Cisco IOS IP Configuration Guid e 171.69.214.203 -> 0.0.0.0 [1/0/pim/querier/down/leaf] 171.69.214.18 -> 171.69.214.20 (mm1-45e.cisco.com) [1/0/pim] 171.
Configuring DVMRP In teroperability Advanced DVMRP Interoperability Configuration Task List IPC-540 Cisco IOS IP Configuration Guide See the “ D VMRP T unnel Example ” section later in this chapter for an e xample of ho w to conf igure a D VMRP tunnel.
Configuring DVMRP Interoperability Advanced DVMRP Interoperabilit y Configurati on Task List IPC-541 Cisco IOS IP Configuration Guid e When D VMRP unicast rout ing is enabled, the ro uter caches routes learned in DVMRP report messages in a D VMRP routing table.
Configuring DVMRP In teroperability Advanced DVMRP Interoperability Configuration Task List IPC-542 Cisco IOS IP Configuration Guide Note At least one, more-specific route must be present in the unicast routing table befo re a confi gured summary address will b e adv ertised.
Configuring DVMRP Interoperability Advanced DVMRP Interoperabilit y Configurati on Task List IPC-543 Cisco IOS IP Configuration Guid e Rejecting a DVMRP Nonpruning Neighbor By default, Cisco routers accept a ll DVMRP neighbors as peers, rega rdless of their D V MRP capability or lack of.
Configuring DVMRP In teroperability Advanced DVMRP Interoperability Configuration Task List IPC-544 Cisco IOS IP Configuration Guide Figur e 94 Router Reje cts Nonpr uning D VMRP Neigh bor Note that the ip dvmrp r eject-non-pruners command pre vents peering with neighbors only .
Configuring DVMRP Interoperability Monitoring and Main taining DVMRP IPC-545 Cisco IOS IP Configuration Guid e Monitoring and Maintaining DVMRP T o clear routes from the D VMRP routing table, use the .
Configuring DVMRP In teroperability DVMRP Configuration Examples IPC-546 Cisco IOS IP Configuration Guide ip unnumbered ethernet 0 ip pim dense-mode tunnel source ethernet 0 tunnel destination 192.70.92.133 tunnel mode dvmrp ! interface ethernet 0 description Universitat DMZ-ethernet ip address 192.
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IN-549 Cisco IOS IP Configuration Guide INDEX Symbols <cr> xli ? command xl A accept-lifetime command DRP route authentication IPC-87 EIGRP route authentication IPC-266 access-class command IPC-.
Index IN-550 Cisco IOS IP Configuration Guide timeout IPC-14 tables IP contents, displaying IPC-14 defining static IPC-13 arp arpa comma nd IPC-14 arp probe command IPC-14 arp snap command IPC-14 arp .
Index IN-551 Cisco IOS IP Configuration Guide configuring IPC-293 to IPC-327 connections immediately, resetting EBGP IPC-311 status, displaying IPC-332 default local prefer ence value, changing IPC-32.
Index IN-552 Cisco IOS IP Configuration Guide types IPC-31 C carriage return (<cr>) xli cautions, IP access lists IPC-91 cautions, us age in text xx xiv CDP (Cisco Discovery Protocol) dialer map.
Index IN-553 Cisco IOS IP Configuration Guide clear ip pim auto-rp command IPC-446 clear ip route command IPC-47, IPC-378 clear ip route dhcp command IPC-76 clear ip rtp header-compr ession command IP.
Index IN-554 Cisco IOS IP Configuration Guide messages dhcpack IPC-66 dhcpdecline IPC-66 dhcpdiscover IPC-66 dhcpoffer IPC-66 dhcprequest IPC-66 options, autoconfiguri ng IPC-74 server boot file, spec.
Index IN-555 Cisco IOS IP Configuration Guide split horizon, enabling IPC-267 stub routing benefit s IPC-271 configuration tasks IPC-272 configuring IPC-268 overview IPC-268 restrictions IPC-271 verif.
Index IN-556 Cisco IOS IP Configuration Guide helper addresses IP (example) IPC-60 configuring IPC-32 hit table count, clearing prefix list entries IPC-308 holddown definition IPC-214 disabling, IGRP .
Index IN-557 Cisco IOS IP Configuration Guide IP traffic, routing IPC-30 interface configuration mode, summary of xl interfaces circuit typ e, IS-IS, settin g IPC-282 IP addresses assigning multiple I.
Index IN-558 Cisco IOS IP Configuration Guide named access lists IPC-91 name server, specifying IPC-17 performance parameters IPC-110 PIM See IP multicast routing, PIM policy routin g IPC-373, IPC-376.
Index IN-559 Cisco IOS IP Configuration Guide ip dvmrp metric mbgp command IPC-355 ip dvmrp metric-offset command I PC-542 ip dvmrp reject-non -pruners command IPC-544 ip dvmrp routeh og-notificat ion.
Index IN-560 Cisco IOS IP Configuration Guide CGMP clearing IPC-446 enabling IPC-440 proxy IPC-440 debug messages, logging IPC-415 designated router IPC-425 diagnostic tool IPC-521 DVMRP automatic sum.
Index IN-561 Cisco IOS IP Configuration Guide mroute IPC-429 mrouted advertising rout es IPC-540 description IPC-538 tunnel interface desti nation address IPC-539 MSDP benefit s IPC-479 enabling IPC-4.
Index IN-562 Cisco IOS IP Configuration Guide description IPC-528 monitoring and maint aining IPC-53 3 prereq uisites IPC-531 verifying IPC-532 RP (rendezvous point) address, configuring IPC-406 Auto-.
Index IN-563 Cisco IOS IP Configuration Guide ip nhrp holdti me command IPC-26 ip nhrp interest command IPC-22 ip nhrp map comman d IPC-21, IPC-49 ip nhrp max-send command IPC-25 ip nhrp ne twork-id c.
Index IN-564 Cisco IOS IP Configuration Guide ip tcp chunk-size command IPC-114 ip tcp compression-connection s command IPC-112 ip tcp finwait-time command IPC-114 ip tcp header-c ompression comman d .
Index IN-565 Cisco IOS IP Configuration Guide lock-and-key access, dynamic access list IPC-88 log-adj-changes command IPC-235 log neighbor ad jacencies,EIGRP IPC-260 loopbacks, use with OSPF IPC-232 l.
Index IN-566 Cisco IOS IP Configuration Guide overview IPC-115 port number, speci fying IPC-118 related documentation IPC-116 specifying IP and IGMP address IPC-118 wildcard blocks, di splaying I PC-1.
Index IN-567 Cisco IOS IP Configuration Guide N named IP access lists IPC-91 NAT (Network Address Translation) configuring IPC-35 displayin g translations IPC-46 dynamic entries, clearing IPC-46 dynam.
Index IN-568 Cisco IOS IP Configuration Guide enabling OSPF IPC-225 enabling RIP IPC-200 network diam eter, enforc ing (IGRP) IPC-218 network masks, format IPC-47 network numbers BGP IPC-293 OSPF IPC-.
Index IN-569 Cisco IOS IP Configuration Guide broadcast or nonbroadcast net works, configuring for IPC-226 checksum pacing IPC-236 Cisco implementation IPC-223 complex configuration ( example) IPC-249.
Index IN-570 Cisco IOS IP Configuration Guide permit command IPC-91 PGM (Pragmatic General Multicast) See IP multicast routing, PGM PIM (Protocol Independen t Multicast) See IP multicast routing, PIM .
Index IN-571 Cisco IOS IP Configuration Guide subnetting IPC-9 RFC 792 Internet Control Message Protocol (ICMP) IPC-81 RFC 826 ARP IPC-13 RFC 862, Echo TC P and UDP service IPC-1 RFC 863, Discard TCP .
Index IN-572 Cisco IOS IP Configuration Guide automatic route su mmarization, di sabling IPC-206 enabling IPC-200 hop count IPC-199 redistribution (exampl e) IPC-382 route summ arization IPC-203 (exam.
Index IN-573 Cisco IOS IP Configuration Guide description IPC-430 enabling IPC-432 express IPC-433 Frame Relay enc apsulation (example) IPC-453 using IPC-432 Frame Relay statistics, displaying IPC-446.
Index IN-574 Cisco IOS IP Configuration Guide show ip aliases command IPC-48 show ip arp command IPC-48 show ip bgp ci dr-only command IPC-332 show ip bgp command IPC-332 show ip bgp community comman .
Index IN-575 Cisco IOS IP Configuration Guide show ip pim rp command IPC-408, IPC-447, IPC-476 show ip pim rp-hash command IPC-422 show ip pim rp mapping command IPC-475 show ip pim vc command IPC-447.
Index IN-576 Cisco IOS IP Configuration Guide IP, creating network from separated, (exampl e) IPC-50 use of subnet zero, enabling IPC-9 variable length subn et masks (example) IPC-244, IPC-379 definit.
Index IN-577 Cisco IOS IP Configuration Guide tunnel udlr recei ve-only command I PC-509 tunnel udlr send- only command IPC-509 Turbo ACL (Access Control List) IPC-96 turbo flooding IPC-34 U UDLR (uni.
Index IN-578 Cisco IOS IP Configuration Guide.
An important point after buying a device Cisco Systems 78-11741-02 (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 78-11741-02 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 78-11741-02 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cisco Systems 78-11741-02 you will learn all the available features of the product, as well as information on its operation. The information that you get Cisco Systems 78-11741-02 will certainly help you make a decision on the purchase.
If you already are a holder of Cisco Systems 78-11741-02, 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 78-11741-02.
However, one of the most important roles played by the user manual is to help in solving problems with Cisco Systems 78-11741-02. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cisco Systems 78-11741-02 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
