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3Com 5000 Series Installation Manual

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www.3Com.com
Part Number: 10015048 Rev AA
March 2006
3Com Router 5000 Family
Installation Guide
3C13701
3C13751
3C13755
3C13759

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Summary of Contents for 3Com 5000 Series

  • Page 1 3Com Router 5000 Family Installation Guide 3C13701 3C13751 3C13755 3C13759 www.3Com.com Part Number: 10015048 Rev AA March 2006...
  • Page 2 LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

  • Page 3: Table Of Contents

    2.2 3Com Router 5012 Router....................2-3 2.2.1 Appearance ......................2-3 2.2.2 Panel LEDs ......................2-5 2.2.3 System Description ....................2-5 2.3 3Com Router 5012A/5013/5014 Router ................2-7 2.3.1 Appearance ......................2-7 2.3.2 Panel LEDs ......................2-8 2.3.3 System Description ....................2-9 2.4 3COM ROUTER 5232 Router ..................
  • Page 4 3Com Router 5000 Family Installation Guide Table of Contents 4.2.1 Installing the Router on a Workbench..............4-2 4.2.2 Installing the Router in a Rack ................4-2 4.3 Installing MIM Modules ...................... 4-3 4.4 Connecting the PGND Wire....................4-3 4.5 Connecting the power cord....................4-4 4.5.1 Power input and PGND...................

  • Page 5: Chapter 1 Overview

    1.1 Brief Introduction 3Com 5000 Routers are intended for use on enterprise-level networks. Depending on the network size, 3Com 5000 Routers can either be core routers on small and medium enterprise networks, or access routers for network branches on some large-sized enterprise networks.
  • Page 6 PSTN to serve as a small access server. IV. Ethernet access solution By extending SICs and MIMs, 3Com 5000 Routers can provide multiple forms of Ethernet interfaces, such as optical/electrical interface, 10/100/1000Mbps interface. Thereby, the networking capability of the router can be significantly improved.

  • Page 7: Types Of Sics

    3Com 5000 Router adopts integrated structure design. It performs excellently on heat dissipation, EMC (Electromagnetic Compatibility) and safety. 1.2 Types of SICs 3Com 5000 Router Family provide two SIC slots which can accept the following types of SICs for this release. I. Voice interface card...
  • Page 8 3Com Router 5000 Family Installation Guide Chapter 1 Overview Router 4-port E&M module (3C13785) Router 1-port E1 Voice MIM module (3C13786) Router 1-port T1 Voice MIM module (3C13787) II. Encryption module Router NDEC2 Encryption Accelerator MIM (3CR13773-75) 3Com Corporation...

  • Page 9: Chapter 2 System Specifications

    9)) Fastening screw of the chassis 10) SLOT2 (SIC slot) 11) SLOT3 (SIC slot) Figure 2-2 Rear view of 3Com Router 5009 Router 2.1.2 Panel LEDs Seven LEDs are provided on 3Com Router 5009 Router. Their meaning is explained in the following table: 3Com Corporation...

  • Page 10: System Description

    Steady ON or steady OFF means that the system is operating abnormally. POWER Power LED. It is ON after power-on. 2.1.3 System Description Table 2-2 System description of 3Com Router 5009 Router Item Description One Console port (CON) One AUX port (AUX)

  • Page 11: 3Com Router 5012 Router

    Boot ROM: Stores Bootstrap program. 2.2 3Com Router 5012 Router 2.2.1 Appearance 1) POWER 2) SYSTEM 3) SLOT1 4) SLOT2 5) SLOT3 6) WAN 7) LAN Figure 2-3 Front view of 3Com Router 5012 3Com Corporation...
  • Page 12 3) SLOT1 4) SLOT2 5) SLOT3 6) WAN 7) LAN0 8) LAN1 Figure 2-4 Front view of 3Com Router 5012 1) Power switch 2) Power socket 3) Grounding screw 4) Fixed interface (WAN) 5) Console port (CON) 6) Auxiliary port (AUX)

  • Page 13: Panel Leds

    3Com Router 5000 Family Installation Guide Chapter 2 System Specifications 2.2.2 Panel LEDs Eight LEDs are provided on 3Com Router 5012 Router. Their meaming is explained in the following table: Table 2-3 LEDs of 3COM ROUTER 5012 Router Indication System power LED: OFF means power is off, ON means POWER power is on.
  • Page 14 3Com Router 5000 Family Installation Guide Chapter 2 System Specifications Item 5012 5012 One 10/100 Mbps Two 10/100 Mbps Ethernet Ethernet interface interfaces One WAN interface One WAN interface Fixed interface One AUX port One AUX port One console port...

  • Page 15: 3Com Router 5012A/5013/5014 Router

    (9) Auxiliary port (AUX) (10) Fixed Ethernet interface (LAN0) (11) Fixed Ethernet interface (LAN1) (12) MIM slot 1 Figure 2-8 Rear view of 3Com Router 5012A (AC-input type) Router (1) SIC slot 3 (2) SIC slot 2 (3) Power switch...

  • Page 16: Panel Leds

    Figure 2-10 Rear view of 3Com Router 5014 (AC-input type) Router 2.3.2 Panel LEDs Seven LEDs are provided on the front panel of 3Com Router 5012A/5013/5014 Router. Their meaming is explained in the following table: Table 2-5 LEDs on the front panel of 3COM ROUTER 5012A/5013/5014 Router...

  • Page 17: System Description

    3Com Router 5000 Family Installation Guide Chapter 2 System Specifications Table 2-6 LEDs on the rear panel of 3COM ROUTER 5012A/5013/5014 Router Indication LINK ON indicates that a link is present. OFF indicates that no link is present. OFF indicates no data traffic on the port. Blinking indicates that packets are received or transmitted on the port.

  • Page 18: 3Com Router 5232 Router

    1) POWER 2) SYSTEM 3) AUX 4) CON 5) SLOT1~3 (READY/ACTIVE) 6) LAN (READY/ACTIVE) Figure 2-11 Front view of 3COM ROUTER 5232 Router 1) Power switch 2) Power socket 3) Grounding screw 4) Fixed interface (ETERNET0) 5) MIM SLOT1 6) MIM SLOT2...

  • Page 19: Panel Leds

    7) MIM SLOT3 Figure 2-13 Rear view of 3COM ROUTER 5232 Router 2.4.2 Panel LEDs 10 LEDs are provided on 3COM ROUTER 5232 Router. Their meaming is explained in the following table: Table 2-8 LEDs of 3COM ROUTER 5232 Router...
  • Page 20 3Com Router 5000 Family Installation Guide Chapter 2 System Specifications Item 5232 5232 MPC 8245 300 MHz NVRAM 128 KB Boot ROM 512 KB Default: 128 MB SDRAM Max.: 256 MB Flash 32 MB Physical dimensions (H x 44.4 x 442 x 413 mm (1.7 x 17.4 x 12.4 in.)

  • Page 21: 3Com Router 5682 Router

    11) MIM SLOT7 Figure 2-15 Rear view of 3Com Router 5682 Router 2.5.2 Panel LEDs 18 LEDs are provided on 3Com Router 5682 Router. Their meaming is explained in the following table: Table 2-10 LEDs of 3COM ROUTER 5682 Router Indication System power LED: OFF means power is off.

  • Page 22: System Description

    OFF means no data is being transceived by the module in the corresponding slot. 0 - 7 The corresponding slot number. 2.5.3 System Description Table 2-11 System description of 3COM ROUTER 5682 Router Item Description Slot MPC8245 300 MHz...

  • Page 23: Chapter 3 Installation Preparation

    Chapter 3 Installation Preparation Chapter 3 Installation Preparation 3.1 Requirements on Environment 3Com 5000 Routers must be used indoors. To ensure the normal operation and prolong their service life, the following requirements for installation site must be met. 3.1.1 Requirements on Temperature/Humidity Certain requirements on temperature and humidity in the equipment room shall be met.

  • Page 24: Requirements On Electrostatic Discharge Prevention

    0.05 0.01 3.1.3 Requirements on Electrostatic Discharge Prevention Although many antistatic considerations have been given to 3Com 5000 Routers, damage to the router’s circuit or even the whole equipment may still happen when the static electricity exceeds the tolerance threshold.

  • Page 25: Requirements On Preventing Lightning

    To enhance the lightning protection capability of the power supply, a lightning arrester could be installed at the input end of the power supply. As for the signal line outdoors to which the interface modules of 3Com 5000 Routers are connected, such as ISDN line, telephone line, E1/T1 line, etc, a special lightning arrester should be installed at the input end of the signal line to enhance the lightning protection capability.

  • Page 26: Tools, Meter And Devices

    3Com Router 5000 Family Installation Guide Chapter 3 Installation Preparation Warning: It indicates that this operation is incorrect and may seriously damage the router or endanger the operator. Please follow the correct operation procedures for sake of safety. Caution: It indicates that during the installation and usage of the router, the operation needs attention.
  • Page 27 Ethernet HUB or LAN Switch CSU/DSU (channel service unit/data service unit) or other DCE devices Console terminal (can be an ordinary PC) Multimeter Caution: 3Com 5000 Routers are not shipped with any installation tools, and the user has to prepare the tools. 3Com Corporation...

  • Page 28: Chapter 4 Installation Of The Router

    Normal? Power off Power off and disconnect the power cord Install MIM Connect Router to Ethernet Connect Router to WAN Connect Router to voice device Check Connect power cord/power on Figure 4-1 3Com 5000 Routers Router installation process 3Com Corporation...

  • Page 29: Installing The Router To The Specified Location

    Do not place heavy objects on the router. 4.2.2 Installing the Router in a Rack 3Com 5000 Routers are designed according to the dimensions of a 19-inch standard rack. As shown in Figure 4-2, follow the steps below to install the router: Step 1: Check the grounding and stability of the rack.

  • Page 30: Installing Mim Modules

    Therefore, the user must first correctly connect the PGND wire before installing and using the device. The power input end of 3Com 5000 Routers is connected to a noise filter. The neutral point of the noise filter is directly connected to the chassis and is called protection ground (PGND).

  • Page 31: Connecting The Power Cord

    4.5 Connecting the power cord The user is provided with two types of 3Com 5000 Routers: AC-powered and DC-powered. Except for the input power, these two types have exactly the same features and functions.

  • Page 32: Connecting Ac Power Cord

    3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Table 4-2 Power input and PGND of other models Item Description Power input AC model: 100 to 240VAC power input socket DC model: -48 to -60VDC power input socket...

  • Page 33: Connecting Dc Power Cord

    3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router 4.5.3 Connecting DC Power Cord I. DC power supply Rated voltage range: -48 to -60VDC The following figures illustrate the partial external appearance of the power socket for a...
  • Page 34 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router TO BGND TO BGND TO -48V TO -48V (1) Main label Figure 4-7 DC power cord Figure 4-8 DC power cord Step 1: Confirm that the PGND wire has been correctly connected.

  • Page 35: Connecting Console Terminal

    4.6 Connecting Console Terminal I. Introduction to console port 3Com 5000 Router provides an RS232 asynchronous serial console (CON) port, through which configuration of the router can be performed. For the attributes of the console port, refer to Table 4-3:...

  • Page 36: Connecting Router To The Lan

    Chapter 5. 4.7 Connecting Router to the LAN I. Introduction to the Ethernet interface 3Com 5000 Routers provide fixed 100BASE-TX FE interface(s). For the interface attributes, refer to Table 4-4. Table 4-4 Attributes of the Ethernet interface Attribute...

  • Page 37: Connecting Router To The Wan

    4.8 Connecting Router to the WAN 3Com 5000 Routers provide multiple types of WAN interfaces, and the fixed WAN interfaces include an AUX port and a WAN interface (synchronous/asynchronous serial interface). This section describes the connection of the two interfaces. Connecting the...
  • Page 38 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router I. Introduction to the AUX port As an RS232-compliant asynchronous serial interface, the AUX port can be used as the backup of other WAN interface in the dial-up mode. In the event that the console port fails, the AUX port can serve as a console port.

  • Page 39: Connecting Wan Interface To Dsu/Csu

    I. Connecting synchronous/asynchronous serial interface to DSU/CSU Introduction to the synchronous/asynchronous serial interface The fixed WAN interface of 3Com 5000 Routers is a synchronous/asynchronous serial interface, which is usually used for the connection with a WAN device, such as a Modem or CSU/DSU.
  • Page 40 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Description Attribute Synchronous Asynchronous LAPB Protocol SLIP HDLC X.25 Frame Relay Note: When using the DB50 connector, you cannot connect RS530 DCE cable. Synchronous/asynchronous mode Synchronous/Asynchronous serial interface can work in either synchronous or asynchronous mode.
  • Page 41 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Caution: The baud rate should not exceed 64kbps when the V.24 cable operates in synchronous mode. DTE and DCE Synchronous serial interface can operate in both DTE and DCE mode. For two devices connected directly, one should operate in DTE mode, and the other should operate in DCE mode.
  • Page 42 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Figure 4-12 V.24 (RS232) DTE cable assembly V.24 (RS232) DCE cable assembly Figure 4-13 V.24 (RS232) DCE cable assembly V.35 DTE cable assembly 3Com Corporation 4-15...
  • Page 43 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Figure 4-14 V.35 DTE cable assembly V.35 DCE cable assembly Figure 4-15 V.35 DCE cable assembly X.21 DTE cable assembly 3Com Corporation 4-16...
  • Page 44 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Figure 4-16 X.21 DTE cable assembly X.21 DCE cable assembly Figure 4-17 X.21 DCE cable assembly RS449 DTE cable assembly Figure 4-18 RS449 DTE cable assembly RS449 DCE cable assembly...
  • Page 45 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Figure 4-20 RS530 DTE cable assembly The synchronous/asynchronous series interface matches a DB28 connector, and current these types of synchronous/asynchronous series interface cables are supported: V.24 (RS232) DTE cable: DB25 (male) connector V.24 (RS232) DCE cable: DB25 (female) connector...
  • Page 46 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router V.35 DTE cable assembly Figure 4-23 V.35 DTE cable assembly V.35 DCE cable assembly Figure 4-24 V.35 DCE cable assembly X.21 DTE cable assembly Figure 4-25 X.21 DTE cable assembly X.21 DCE cable assembly...
  • Page 47 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router RS449 DTE cable assembly Figure 4-27 RS449 DTE cable assembly RS449 DCE cable assembly Figure 4-28 RS449 DCE cable assembly RS530 DTE cable assembly Figure 4-29 RS530 DTE cable assembly...
  • Page 48 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Caution: The aforementioned cables are optional, so you have to order them in purchasing the router if needed. Connection of sync/async serial cable Caution: Do not hot swap the synchronous/asynchronous cable. Otherwise, the router or the connected remote equipment may be impaired.
  • Page 49 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router E1 75Ω unbalanced coax cable E1 120Ω balanced coax cable Matching cable Coax connector, network interface connector, 75Ω−120Ω converter (with BNC connector) Operating E1, CE1, ISDN PRI mode...
  • Page 50 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Figure 4-32 E1 120Ω balanced twisted pair cable Note: You can also choose to attach both ends with RJ45 connectors, for extending two 120 balanced twisted pair cables.
  • Page 51 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router Step 1: Check the E1 cable type and choose correct impedance value of the E1 interface through the inverter switch. Step 2: Insert the DB15 connector into the E1 interface of the router.
  • Page 52 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router which is connected to a 120Ω E1 trunk cable. The 120Ω E1 trunk cable is then connected to the peer device. DB-15 RJ-45 RJ-45 120Ω E1 120Ω banlanced...
  • Page 53 3Com Router 5000 Family Installation Guide Chapter 4 Installation of the Router T1 interface cable T1 interface matches 100Ω standard shielded cable. See the following table: Figure 4-35 T1 interface cable You can also choose to use network connector assembly, for extending two T1 interface cables.

  • Page 54: Connecting Router To A Voice Device

    OFF means that no link is present and you need to check the line. 4.9 Connecting Router to a Voice Device The optional interface cards/interface modules on 3Com 5000 Router also provides many types of voice interfaces. 4.10 Checking after the Installation...

  • Page 55: Chapter 5 Startup And Configuration Of The Router

    3Com Router 5000 Family Installation Guide Chapter 5 Startup and Configuration of the Router Chapter 5 Startup and Configuration of the Router 5.1 Startup of the Router You can only configure the router through the console port if it is the first time you use it.
  • Page 56 3Com Router 5000 Family Installation Guide Chapter 5 Startup and Configuration of the Router Select the serial interface to be connected in the [Connect using] box, as shown in Figure 5-2. Please note that the selected serial interface should be consistent with the actual serial interface connected by the console cable.

  • Page 57: Powering On The Router

    3Com Router 5000 Family Installation Guide Chapter 5 Startup and Configuration of the Router Figure 5-3 Setting serial interface parameters Set HyperTerminal properties. Select [Properties\Port Settings] in the HyperTerminal to enter the properties setting window as shown in Error! Reference source not found.. Select the terminal emulation type to be VT100 or Auto detect, and click <OK>...

  • Page 58: Startup Process

    (please see “Section 5.1.3 Startup Process” in this manual for reference). After the startup (in other words, self-test), the user is prompted to press <Enter>. When “<3Com>” is displayed, the user can proceed to configure the router. 5.1.3 Startup Process 3Com 5000 Routers use the same version of Boot ROM program.

  • Page 59: Configuration Fundamentals Of The Router

    Press <Ctrl+B> and the system will enter the Boot menu. Otherwise, the system will enter the program decompression process. Note: After “3Com 5000 Router Boot ROM, V9.13” appears, “3Com start booting, (V2.00)” will disappear immediately. The system enters the Boot menu only if <Ctrl+B> is pressed immediately (within three seconds) after the statement “Press Ctrl-B to Enter Boot Menu...”...

  • Page 60: Command Line Interface

    5.2.2 Command Line Interface I. Characteristics of the command line interface The command line interface of 3Com 5000 Routers provides a number of configuration commands, which can be used to configure and manage the router. The command line interface has the following characteristics: Performs the local configuration through CON port.
  • Page 61 3Com Router 5000 Family Installation Guide Chapter 5 Startup and Configuration of the Router be executed under a particular view. But some common commands (such as ping, display current-configuration, interface) can be executed in all views. 3Com Corporation...

  • Page 62: Chapter 6 Router Maintenance

    Upgrading application and Boot ROM image through XMODEM Upgrading the application image through TFTP Uploading/downloading the application image and configuration file through FTP 3Com 5000 Routers are loaded initially. You may need to upgrade it and its corresponding Boot ROM image to accommodate new product features. Note: Examine the current version of the application and Boot ROM program before software upgrade.
  • Page 63 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance Please input bootrom password: Enter the correct password (void by default) to have the system enter Boot Menu: Boot Menu: Download application program with XMODEM Download application program with NET...
  • Page 64 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance Note that: The application images for system boot can be type M, B and S, but not type N/A. You can store them in Flash memory, but only one for each. For example, if an M+B file exists, it is impossible to have another M or B file.
  • Page 65 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance M=MAIN B=BACKUP S=SECURE ************************************************************************** Name Size Type Time main.bin 5988025 Oct/10/2002 10:10:10 backup.bin 5985198 Oct/10/2002 10:10:10 a.bin 5987491 Oct/10/2002 10:10:10 s_system.bin 5988022 Oct/10/2002 10:10:10 ************************************************************************** Exit to main menu Where, you can see that the type of a.bin is now M.
  • Page 66 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance Download Boot ROM with XModem Download Extended Segment of Boot ROM with XModem Restore Extended Segment of Boot ROM from FLASH Backup Extended Segment of Boot ROM to FLASH Exit to Main Menu Enter your choice(1-5): 10) Ignore software version check for backward compatibility.
  • Page 67 Step 6: After completing download, the system begins writing to Flash memory and upon its completion outputs the following information: Download completed. For an 3Com 5000 router, the system also prompts you to select file type upon completion of downloading. please select file to be saved as 1.
  • Page 68 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance The system starts writing to Flash memory after you enter your choice and displays: Writing to flash memory... Please wait,it needs a long time .Please wait... ######################################################## Writing FLASH Success.
  • Page 69 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance Caution: This upgrade approach upgrades only a portion of the Boot ROM image, so you can make a second attempt once errors occur. III. Backing up and restoring the extended segment of the Boot ROM image Back up the extended segment of the Boot ROM image to Flash memory Step 1: Enter Boot Menu, select <9>...
  • Page 70 Installation Guide Chapter 6 Router Maintenance Caution: No TFTP/FTP Server is available with the 3Com 5000 Routers. You must install one yourself. Start TFTP or FTP Server on the PC connected to the Ethernet interface on the router and set the path for getting the source file. Given FTP Server, you need to set user name and password in addition.

  • Page 71: Hardware Maintenance

    3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance inet on ethernet (e) : IP address of the Ethernet interface for downloading host inet (h) : IP address of FTP Server user (u): User name, same as the one configured at FTP Server.

  • Page 72: Opening The Chassis Cover

    Flat-blade screwdriver ESD-preventive wrist strap Static shielding bag Note: No installation tools were provided with the 3Com 5000 Routers. You must prepare them yourself. 6.2.2 Opening the Chassis Cover Follow these steps to open the chassis cover: Step 1: Turn off the power switch of the router and remove the power cord.

  • Page 73: Replacing The Sdram

    Chapter 6 Router Maintenance Caution: On a mounting screw of your router chassis, there is an anti-dismantle seal of 3Com Corporation. You must keep it in good condition when asking your sales agent for servicing. You can open the chassis yourself but with permission of your sales agent and must operate following the related rules.
  • Page 74 The existing SDRAM is damaged. You can see this banner at boot: Router starts booting ... (V2.00) *********************************************** 3Com 5000 Routers Boot ROM, V9.13 * *********************************************** Copyright(C) 1997-2003 by 3Com Corporation. Testing memory...OK! 128M...
  • Page 75 The following figure illustrates the position of the SDRAM on the 3COM ROUTERS. Figure 6-4 Position of the SDRAM on the 3COM ROUTER Figure 6-5 The following figure illustrates the position of the SDRAM on the 3COM ROUTER 5232. 3Com Corporation...
  • Page 76 Installation Guide Chapter 6 Router Maintenance Figure 6-6 Position of the SDRAM on the 3Com 5000 To ensure you can install the SDRAM correctly, there are two clips In the SDRAM slot matching two concave points in the SDRAM card.

  • Page 77: Closing The Chassis Cover

    3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance Caution: Hold the SDRAM by its edge and avoid touching the components on its surface. An improper operation might result in damage. It is normal that you feel hard when removing the SDRAM, but do not overexert.
  • Page 78 3Com Router 5000 Family Installation Guide Chapter 6 Router Maintenance （ 2 ） （ 3 ） （ 1 ） 1) Chassis bottom 2) Chassis cover 3) Captive screw Figure 6-8 Close the chassis cover Step 5: Secure the chassis cover to the router base with the captive screw.

  • Page 79: Chapter 7 Troubleshooting

    3Com Router 5000 Family Installation Guide Chapter 7 Troubleshooting Chapter 7 Troubleshooting 7.1 Troubleshooting of the Power System Fault POWER LED is OFF or blinking. Troubleshooting Please check: Whether the power switch of the router is turned on. Whether the power supply switch is turned on.

  • Page 80: Troubleshooting Of Sdram

    If the user is sure that the power system and configuration system have no faults, please contact the agent of 3Com Corporation Co., Ltd. With his consent, open the chassis to check whether the SDRAM has become loose. If that is the case, you may remove and reinstall the SDRAM.

  • Page 81: Application Software Upgrade

    If the SDRAM is damaged, replace it with a new one (before opening the chassis, please contact the agent of 3Com Corporation Co, Ltd. and get his permission to continue with the operation). For the operation method, please refer to Section 6.2 “Maintain the Hardware”...
  • Page 82 Press <Enter> key when ready. Troubleshooting 3Com 5000 Routers should be loaded with different application software versions. The problem described above is likely to result from a mismatch between the application software version and the router model. In this case, contact your agent to obtain the correct software version and upgrade it again.

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