Instruction/ maintenance manual of the product Baseline 2816 3Com
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www.3com.com Part No. DUA1648-5AAA03 Published August 2005 Baseline Switch 2816-SFP/2824-SFP Plus User Guide 3C Number: 3C16 485A/3C16487.
3Com Corporation • 350 Campus Dri ve • Marlborough • MA USA 01752-3064 Copyright © 2004-2005 , 3Com Corporation. All rights r eserved. No part of this documentation may be r eproduced in any fo.
C ONTENTS A BOUT T HIS G UIDE Naming C onvention 5 Conventions 5 Related Docu mentation 6 Documentation Comments 6 Produc t Registration 6 1 I NTR ODUCING THE B ASELINE S WITCH Overview of the Baselin.
Changing the Admin Pa ssword 28 Modifying the IP Addr ess Settings 29 Automatic IP Co nfiguratio n 29 Setting the IP Addr ess 30 Configuring Port Settings 31 Basic Port Configuration 31 Advanced Port .
A BOUT T HIS G UIDE This guide is intended for use by those r esponsible for installing and setting up network equipme nt. Consequently , it assumes a basic working knowledge of local area ne tworks (LANs).
6 A BOUT T HIS G UIDE Related Documentation In addition to this gui de, each 3Com Baseline Switch 2816-SFP/2824-SFP Plus documen tation set includes the following : ■ Online Help – Accessible fr om the W eb interface, provides info rmation that helps you perform tasks using the Web interface.
1 I NTR ODUCING THE B ASELINE S WITCH This chapter pr ovides an ov erview of th e features and capabilities of the 3Com ® Base line Switch 2816/2824-SFP Plus. It al so identifies the contents of the Switch package and helps you get to know the physica l features of the device.
8 C HAPTER 1: I NTRODU CING THE B ASELINE S WITCH any combination. Th is of fers you the fl exibility of using SFP transceivers to pro vide connectivity between the Switch and a 1000 Mbps cor e network. When an SFP port is in ope ration, the corr esponding 10/100/1000BAS E-T port is disabled.
Physical Fe atures 9 supports automatic MDI/MDI-X detecti on and can be connected to a 10BASE-T , 100BASE-TX, or a 1000BASE-T device. Ports 1 to 16 (2816-SFP) or ports 1 to 24 (2824-SFP) ar e auto-neg.
10 C HAPTER 1: I NTRODU CING THE B ASELINE S WITCH (4) Module Active LEDs The Module Active LEDs shows the status of any SFP modules that ar e installed. (5) Port Duplex LEDs The second and fourth (bottom) r ow of Status LEDs, which are c olored y ellow , show the duplex status of the related ports.
Package Cont ents 11 (7) Self-Adhesive Pads The unit is supplied with four self-a dhesive rubber pads. If you intend to rack-mount the Switch, do not apply the pads. If the unit is to be part of a fr ee-standing stack, apply the pads to each marked corner area on the underside of the unit.
12 C HAPTER 1: I NTRODU CING THE B ASELINE S WITCH.
2 I NSTALLING THE S WITCH This chapter contain s information that you need to install and set up the Switch . It covers the following topics: ■ Befor e Y ou Begin ■ Positioning the Switch ■ Rack.
14 C HAPTER 2: I NSTALLING THE S WITCH Alternatively , the Switch can be rack-mounted in a wiring closet or equipment r oom. A mounting kit, containing two mounting brackets and four scr ews, is supplied with the Switch. When deciding wher e to position the Switch, ensu re that: ■ It is accessible and cables can be con nected easily .
Rack-Moun ting or Free- Standing 15 3 Insert the two screws suppli ed in the mounting kit, and the fully tighten with a suitable screwdriver . Figur e 2 Inserting the Sc rews 4 Repeat the two previous ste ps for the other side of the unit. 5 Insert the unit into the 19 -inch rack and secure with suitable scr ews (not pr ovided).
16 C HAPTER 2: I NSTALLING THE S WITCH Apply the pads to the underside of each Swit ch, sticking one in the marked area at each corner . Place the Switch units on top of each other , ensuring that the pads of the upper unit line up with the recesses of the lower unit.
Connecting a Network Device 17 If POST fails, try the following: ■ Power off the Switch, an d then power it on again. Check the Power LED and see if POST was successfully completed. ■ Reset the Switch. See “Resetting to Factory Defaults” on page 43.
18 C HAPTER 2: I NSTALLING THE S WITCH 2 Connect the other end to th e appropriate RJ-45 port on the connecting device. For 1000BASE-T operati on, 3Com reco mmends using Category 5e or 6 cables. Using SFP T ransceivers The following se ctions describe how to i nsert and remove an SFP transceiver from an SFP slot.
Performing Sp ot Checks 19 Figur e 4 Inserting an SFP T ransceiver 2 Gently slide the transceiver into the SFP slot until it clicks into place. CAUTION: SFP transceivers are keyed and can be properly inserted only one way . If the transceiver does not click when you insert it, remo ve it, turn it over , and then re-insert it.
20 C HAPTER 2: I NSTALLING THE S WITCH Ta b l e 6 Item s to Check If you experience any pr oblems operati ng the Switch, refer to “T roublesh ooting” on page 49.
3 C ONNECTING TO THE W EB I NTERFACE The Switch has a built-in W eb interface that you can use to set the admin password, cha nge the IP addre ss that is assigned to the Switch, and configur e its advanced settings.
22 C HAPTER 3: C ONNECTING TO TH E W EB I NTERFACE The Welcome screen of Discovery appears. Figure 5 W elcome Sc reen o f Discover y 2 If the computer has multiple network adapte rs, select the adapter that connects the computer to the Switch, and then click Next .
Navigating Around the Web Inter face 23 The logon page also displays the I P address that the Switch is currently using. Figur e 7 Logon Pag e T o log on to the Web interface: 1 In Username , typ e admin . 2 Leave the Passw ord field blank. 3 Click OK .
24 C HAPTER 3: C ONNECTING TO TH E W EB I NTERFACE Ta b l e 7 Available Menu Items Buttons Depending on the page that is curr ently displayed, th e following buttons may appear: ■ Apply – Click to.
Accessing the In terface W ithout Using D iscover y 25 ■ Enable or disable flow contr ol ■ Configur e the speed duplex settings ■ Set traffic priority for the port Accessing the Interface Withou.
26 C HAPTER 3: C ONNECTING TO TH E W EB I NTERFACE.
4 C ONFIGURING THE S WITCH This chapter pr ovides info rmation on how to config ure the Switch’ s features. T opics include: ■ Configuration Overview ■ Viewin g Switch Informa tion ■ Changing .
28 C HAPTER 4: C ONFIGURING THE S WITCH Figure 9 Summary Page Information that you can view on the Summary page include: ■ System Information – Contains optional fiel ds that you can fill out to identi fy the Switch. It also shows the object ID and the time elapsed since th e Switch was last started.
Modifying t he IP Addres s Settings 29 Figur e 10 Passwor d Page T o set the adm in password: 1 On the menu, click Password . The Change Administration Passwor d page a ppears. 2 In Old Password , type your current pa ssword. By default, the Switch does not h ave any password.
30 C HAPTER 4: C ONFIGURING THE S WITCH sticker on the base of the Sw itch. This sti cker contains the MAC address and default IP address of the Swi tch.
Configurin g Port Sett ings 31 Ta b l e 8 IP Setting Opti ons After you configure the Swi tch’ s IP address settings, click Apply to s ave your changes. Configuring Port Settings Using the Web interface, you can configure the speed/duplex and flow contr ol settings of each port.
32 C HAPTER 4: C ONFIGURING THE S WITCH ■ Label – Opti onal nam e fo r the port to help you identify the device connected to it. For ex ample, if an access point is connected to this port, you can label it a s Access Point . ■ Status – Enables and disables the po rt ■ Flow Contr ol – Enables and disables flow contr ol on the port.
Configurin g VLANs 33 always negotiate to half-dup lex, resulting in a duplex mismatch. This can result in a signifi cant reduction in network performance. If you are unsure of how to configure the speed/duplex setti ng, simply enable autonegotiation for the port.
34 C HAPTER 4: C ONFIGURING THE S WITCH VLAN serves as a logi cal workgroup with no phy sical barriers, and allows users to shar e information an d resour ces as though located on the same L AN. Y ou can use the Switch to create VLANs to organize any grou p of ports into separate broadca st domains.
Configurin g VLANs 35 happens, you will need to reset the Switch to factory settings. To c r e a t e a V L A N : 1 On the menu, click VLANs . The VLANs page app ears. 2 In VLAN ID , click Create New VLAN . 3 In VLAN ID (1-4094 ) , type an unused ID number for the VLAN that you are creating.
36 C HAPTER 4: C ONFIGURING THE S WITCH Figure 16 Deskto p VLAN Configu ration If you want to add ports 7, 8, and 16 to VLAN2 (as shown in F igure 16), so that the ports on the defau lt VLAN1 and the ports on VLAN2 cannot communicate with each other , do the following: 1 Create a new VLAN and set the VLAN ID to 2.
Configuri ng Link Ag gregation 37 Figur e 17 Uplink VLAN Configuration T o set up the configuration shown in Figure 17, do the following: 1 Create VLAN2 on both Switch 1 and Switch 2, and assign the same name to it. Y ou need not create VLAN1 since it exists by default.
38 C HAPTER 4: C ONFIGURING THE S WITCH T runking permits the connection of multiple ports to the same remote devi ce in order to achieve hi gher network through put. For link aggr egation to work , the trunks must be configur ed on both ends (switches).
Configuri ng Link Ag gregation 39 Modifying Settings and Deleting an Aggre gated Link Use the Modify/Delete tab to modify th e trunk name and configure flo w control and duplex settings of the aggregated l ink.
40 C HAPTER 4: C ONFIGURING THE S WITCH Figure 20 Summary T ab Viewing Statistics The Statistics page shows a su mmary of traf fic statistics for all ports, as shown in Figure 21. Figure 21 Statistics Page Figures that appear onscr een indicate the number of packets transmitted (Tx) and re ceived (Rx).
Mirroring P ort T raffic 41 Figur e 22 Port Stat istics Page Figures on the Statistics page for individ ual ports are not updated in real time. T o view the latest statistics for the port, click Refresh . Mirroring Port T raffic The Switch allows you to monitor traf fic going in and out of a particular port.
42 C HAPTER 4: C ONFIGURING THE S WITCH ■ Analyzer Port — This is the port to which the analyzer is attached. 4 Click Ap ply . For information on how to inte rpret the output on the port analyzer , refer to its accompanying documentation.
Using the S ystem T ools 43 Figur e 25 Restart T ab Any network users who are curr ently accessing the Internet will have their access interrupted while the restart takes place, and they may need to reboot their computers when the r estart has co mpleted and the Switch is operational again.
44 C HAPTER 4: C ONFIGURING THE S WITCH need to restart your co mputer to re-establish communication with the Switch. Backing Up and Restor ing Configuration T o back up the Switch’ s setting to a configuration file, click Ba ckup . Y ou will be prompted to downloa d and save a file to disk.
Using the S ystem T ools 45 lost while the new software is being copied to the Switch). The upgrade pr ocedure can take a few minutes, and is complete when the P ower LED has stopped flashing and is permanently gr een.
46 C HAPTER 4: C ONFIGURING THE S WITCH Figure 28 Spanni ng T ree T ab ■ Forward — Spanning tree BPDU packets r eceived on a port ar e forwarded to al l other ports. ■ Block and Di scard — Spanning tr ee BPDUs recei ved on a port ar e dr opped.
View ing Support Inf ormation 47 The traffic prio ritization feat ur e supported by the Switch is compatible with the r elevant sections of the IEEE 802.1D standar d (incorporating IEEE 802.1p). This Switch uses the W eighted Round Robin (WRR ) algorithm to determine the fr equency at which it services each priority queue.
48 C HAPTER 4: C ONFIGURING THE S WITCH Figure 30 Suppor t Page.
5 T RO U B LE S H O O T I N G This chapter lists some issu es that you may encounter while installing, us ing, and managing the Switch, with suggested courses of corrective acti on to take. If you encounte r an issue that is not l isted here and you cannot solve it, check the 3Com Knowledgebase at http://knowledgebase.
50 C HAPTER 5: T ROUBLESHOOTING ■ The device being connected to is po wered on and operating corr ectly . ■ The cable is connected at both ends. ■ The cable is not damaged. ■ If the connection is to a workstation, that the workstation's network inte rface is in stalled and configur ed correctly .
Solving LE D Issues 51 If the firmware image beco mes corrupted , you nee d to upgrade the firmwar e. The Switch goes into Fail Safe mode, and the page shown in Figur e 31 displays.
52 C HAPTER 5: T ROUBLESHOOTING 4 Click on the REST ART THE SWITCH button. 5 Restor e the configuration file that you backed up in step 1. Refer to “Configuration” on page 43 for details.
A O BTAINING S UPPORT FOR Y OUR P RO D U C T Register Y our Product W arranty and other service benefits start fr om the date of purchase, so it is i mportant to register your pr oduct quickly to ensur e you get full use of the warranty and other service benefits available to you.
54 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT Updates you must first reg ister your product on the 3Com Web site at http:// eSupport.3com.com/ . First time users will need to apply for a user name and passwor d. A link to software download s can be found at http://eSupport.
Contact Us 55 . Country T elep hone Number Asia, Pacific Rim T elephone T echnica l Support and Repa ir Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philippines P .
56 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonaire Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Re public Guate.
B T ECHNICAL I NFORMATION Related Standards The 3Com Baseline Switch 2816/2824-SFP Plus has been designed to the foll owing standar ds: Environmental Physical Electrical Functional ISO 8802-3, IEEE 802.3 (Et hernet), IEEE 802.3u (Fast Et hernet), IEEE 802.
58 A PPENDIX B: T ECHNICAL I NFORMATION.
C S AFETY I NFORMATION Important Safety Information Please read the foll owing sa fety information carefully befor e installing the Baseline Switch 2816-SFP/ 2824-SFP Plus. WAR NI NG : Installation and removal of the unit must be carried out by qualified perso nnel only .
60 A PPENDIX C: S AFETY I NFORMATION Power Cord Set This must be appr oved for the country where it will be used. L'Information De Sécurité Importante V euill ez lir e à fond l' informat ion de la sécu rité suivante avant d'ins taller le B aseli ne Switch 2816-SFP/2824-SFP Plus.
Wichtige Sicherh eitinforma tionen 61 France et Pérou Uni quement Ce groupe ne peut pas êtr e alimenté par un disposi tif à impédance à la terre.
62 A PPENDIX C: S AFETY I NFORMATION angeschlossenen Geräte unter SE L V -Bedingu ngen betrieben wer den. Stromkabel . Dies muss vo n dem Land, i n dem es benutz t wird geprüft werden: Schweiz ■ Dieser S tromstecker muß die SEV /ASE 1011Bestimmung en einhalt en.
G LOSSARY 10BASE- T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE- TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable. 1000BASE-LX IEEE 802.3z spec ification for Gigabit Ethernet over 9/125 micron cor e single-mode fiber cable.
64 G LOSSARY network, and r emove them by shutting down the bridge causing the lo op. Category 3 Cables One of five grades of T wisted Pair (TP) cabling defined by the EIA/TIA-568 stand ard. Category 3 is voice grade c able and can only be used in Ethern et networks (10BASE-T) to transmit data at speeds of up to 10 Mbps.
65 Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps. Gigabit Ethernet An Ethernet system that is designed to operate at 1000 Mbps. Full Duplex A system that allows packets to be transmitted and received at the same time and, in ef fect, doubles the potential thr oughput of a link.
66 G LOSSARY IP Internet Protocol. IP is a layer 3 network pr otocol that is the standar d for sending data th rough a network. IP is part of the TCP/IP set of protoc ols that describe the routin g of packets to addressed devices.
67 Network A Network is a collection of computers and other computer equipment that ar e connected for the purpose of exchanging informati on or sharing r esources. Networks vary in size, some ar e within a single r oom, others span continents. Ping P acket In ternet G roper .
68 G LOSSARY more LANs than a bridge and ar e generally mor e sophisticated. TCP/IP T ransmission Control Pr otocol/I nternet Protocol. This is the name for two of the most well-known protocol s developed for the inter connection of networks.
R EGULATORY N OTICES FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rul es. These limits are designed to pr ovide reasonable protec ti on against harmful interf erence in a commerical environ ment.
70 C HAPTER : R EGULATORY N OTICES.
I NDEX Numbers 1000BASE-LX 63 1000BASE-SX 63 1000BASE-T 63 100BASE-TX 63 10BASE-T 63 802.1p Prioritization 46 A auto IP confi guration 29 default IP address 30 default mask 30 B bandwidth 63 C categor.
72 I NDEX local area network 66 M MAC address 66 media access contr ol 66 N network defined 67 O obtaining support/feedback 47 P passwor d 51 changing 28 default (blan k) 28 setting 29 positioning the Swi tch 13 POST 16 power cycle 42 power -on self-test See POST prioritization 802.
An important point after buying a device 3Com Baseline 2816 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3Com Baseline 2816 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 3Com Baseline 2816 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com Baseline 2816 you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com Baseline 2816 will certainly help you make a decision on the purchase.
If you already are a holder of 3Com Baseline 2816, 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 3Com Baseline 2816.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com Baseline 2816. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com Baseline 2816 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
