H3C AR 18-3XE/18-21X Series Installation Manual
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H3C AR 18-3XE/18-21X Series Installation Manual

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H3C AR 18-3XE/18-21X Series Routers
Installation Manual
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Manual Version: T2-08045A-20070419-C-1.02

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  • Page 1 H3C AR 18-3XE/18-21X Series Routers Installation Manual Hangzhou H3C Technologies Co., Ltd. http://www.h3c.com Manual Version: T2-08045A-20070419-C-1.02...
  • Page 2 Copyright © 2006-2007, Hangzhou H3C Technologies Co., Ltd. and its licensors All Rights Reserved No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Hangzhou H3C Technologies Co., Ltd. Trademarks H3C,...

  • Page 3: About This Manual

    About This Manual Related Documentation In addition to this manual, each H3C AR 18-3XE/18-21X documentation set includes the following: Manual Content The manual is a guide for the user to perform the operations correctly. It is organized into the parts of getting...
  • Page 4 This manual introduces all cable LMR Series Routers Cable pinouts available with LMR series Manual routers. Organization H3C AR 18-3XE/18-21X Series Routers Installation Manual is organized as follows: Chapter Contents Hardware Features of H3C AR 1 Product Overview 18-3XE/18-21X Series Routers...
  • Page 5 Conventions The manual uses the following conventions: I. Command conventions Convention Description The keywords of a command line are in Boldface Boldface. Command arguments are in italic. italic Items (keywords or arguments) in square brackets [ ] are optional. Alternative items are grouped in braces { x | y | ...
  • Page 6 GUI conventions Convention Description Window names, button names, field names, and menu items are in Boldface. Boldface For example, the New User window appears; click OK. Multi-level menus are separated by angle > brackets. For example, File > Create > Folder.
  • Page 7 Environmental Protection This product has been designed to comply with the requirements on environmental protection. For the proper storage, use and disposal of this product, national laws and regulations must be observed.

  • Page 8: Table Of Contents

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Table of Contents Table of Contents Chapter 1 Product Overview ............1-1 1.1 Introduction ................1-1 1.2 Hardware Features of the AR 18-30E........1-2 1.3 Hardware Features of the AR 18-31E........1-7 1.4 Hardware Features of the AR 18-32E......1-11 1.5 Hardware Features of the AR 18-35E......1-15...

  • Page 9: Chapter 1 Product Overview

    Chapter 1 Product Overview Chapter 1 Product Overview 1.1 Introduction H3C AR 18-3XE Series Routers and AR 18-21X Series Routers are ADSL2+ routers that H3C Technology developed for small office home office (SOHO) subscribers. H3C AR 18-3XE/18-21X Series Routers include AR 18-30E, AR 18-31E, AR 18-32E , AR 18-35E, AR 18-21A and AR 18-21B.

  • Page 10: Hardware Features Of The Ar 18-30E

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview 1.2 Hardware Features of the AR 18-30E I. Appearance (1) Ethernet LED (LAN4) (2) Ethernet LED (LAN3) (3) Ethernet LED (LAN2) (4) Ethernet LED (LAN1) (5) ADSL2+ link LED (DSL LNK)
  • Page 11 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview II. System specifications Table 1-1 System specifications of the AR 18-30E Item AR 18-30E 1 console port Interface 4 x 10/100 Mbps L2 Ethernet ports 1 ADSL2+ over POTS interface...
  • Page 12 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview III. LEDs You may gather information about the status of the AR 18-30E and its interfaces by reading the eight LEDs on its cover, as shown in Table 1-2.
  • Page 13 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview IV. Interface attributes The AR 18-30E provides one console port, four 10/100 Mbps Ethernet ports, and one ADSL2+ over POTS interface. Console port Table 1-3 Attributes of the console port...
  • Page 14 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview ADSL2+ over POTS interface Table 1-5 Attributes of the ADSL2+ over POTS interface Attribute Description Connector RJ-11 1 Mbps (uplink), 20 Mbps to 24 Interface rate Mbps (downlink) ITU-T G.992.1 G.DMT ITU-T G.992.2 G.Lite...

  • Page 15: Hardware Features Of The Ar 18-31E

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview 1.3 Hardware Features of the AR 18-31E I. Appearance (1) Ethernet LED (LAN4) (2) Ethernet LED (LAN3) (3) Ethernet LED (LAN2) (4) Ethernet LED (LAN1) (5) ADSL2+ link LED (DSL LNK)
  • Page 16 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview II. System specifications Table 1-6 System specifications of the AR 18-31E Item AR 18-31E 1 console port 4 x 10/100 Mbps Ethernet ports Interface 1 ADSL2+ over POTS interface...
  • Page 17 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview III. LEDs You may gather information about the status of the AR 18-31E and its interfaces by reading the 10 LEDs on its cover, as shown in Table 1-7.
  • Page 18 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Description OFF means no data is being sent or received on the ISDN link. ISDN ACT Blinking means data is being sent and/or received on the ISDN link. Blinking means the system is operating normally.

  • Page 19: Hardware Features Of The Ar 18-32E

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Attribute Description ISDN dial-up Operating mode ISDN leased line ISDN ISDN supplementary services Service Multi-subscriber number Subaddress Backup 1.4 Hardware Features of the AR 18-32E I. Appearance (1) Ethernet LED (LAN4)
  • Page 20 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapt er 1 Product Overview (1) Power switch (2) Power socket (3) Console port (CONSOLE) (4) Ethernet port 1 (LAN1) (5) Ethernet port 2 (LAN2) (6) Ethernet port 3 (LAN3) (7) Ethernet port 4 (LAN4)
  • Page 21 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Item AR 18-32E 45 x 300 x 180 mm (1.77 x 11.81 x 7.09 in.) Dimensions (the maximum measurements, including the (H x W x D) bulge) Weight 1kg (2.20 lb)
  • Page 22 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Description OFF means no data is being sent or received. DSL ACT Blinking means the interface is sending and/or receiving data. Blinking means the system is operating normally. Steady ON or OFF means the system is improperly operating.

  • Page 23: Hardware Features Of The Ar 18-35E

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Attribute Description ITU-T G.992.1 G.DMT ITU-T G.992.2 G.Lite Interface standard ANSI T1.413 Issue 2 ITU-T G.992.3 ITU-T G.992.5 ADSL2+ access over ISDN lines Service (compatible with ADSL and ADSL2) 1.5 Hardware Features of the AR 18-35E...
  • Page 24 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapt er 1 Product Overview (1) Power switch (2) Power socket (3) Console port (CONSOLE) (4) Ethernet port 1 (LAN1) (5) Ethernet port 2 (LAN2) (6) Ethernet port 3 (LAN3) (7) Ethernet port 4 (LAN4)
  • Page 25 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Item AR 18-35E Rated voltage: 100 VAC to 240 VAC; 50 Hz to 60 Hz Input Power Current: 0.5 A to 1 A supply (external) Voltage: 12 VDC Output Current: 1.25 A...
  • Page 26 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Description OFF means the ADSL line is not activated. Steady ON means the ADSL line has DSL LNK been activated. Blinking means the connected two parties are negotiating parameters.

  • Page 27: Hardware Features Of The Ar 18-21A

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview IV. Interface attributes The AR 18-35E provides one console port, four 10/100 Mbps Ethernet ports, one ISDN S/T interface, and one ADSL2+ over ISDN interface. For their attributes, see the interface attributes of the models described in the preceding sections.
  • Page 28 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapt er 1 Product Overview (1) Power switch (2) Power socket (3) Console port (CONSOLE) (4) Ethernet port 1 (LAN1) (5) Ethernet port 2(LAN2) (6) Ethernet port 3 (LAN3) (7) Ethernet port 4 (LAN4)
  • Page 29 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Item AR 18-21A Rated voltage: 100 VAC to 240 VAC; 50 Hz to 60 Hz Input Power Current: 0.5 A to 1 A supply (external) Voltage: 12 VDC Output Current: 1.25 A...
  • Page 30 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview Description OFF means the ADSL2+ line is not activated. Steady ON means the ADSL2+ line has been DSL LNK activated. Blinking means the connected two parties are negotiating parameters.

  • Page 31: Hardware Features Of The Ar 18-21B

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview 1.7 Hardware Features of the AR 18-21B I. Appearance (1) Ethernet LED (LAN4) (2) Ethernet LED (LAN3) (3) Ethernet LED (LAN2) (4) Ethernet LED (LAN1) (5) ADSL2+ over ISDN link LED (DSL LNK)
  • Page 32 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview II. System specifications Table 1-16 System specifications of the AR 18-21B Item AR 18-21B 1 console port 1 x 10/100 Mbps Ethernet interface (WAN) Interface 4 x 10/100 Mbps L2 Ethernet ports (LAN)
  • Page 33 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview III. LEDs You may gather information about the status of the AR 18-21B and its interfaces by reading the nine LEDs on its cover, as shown in Table 1-17.
  • Page 34 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 1 Product Overview IV. Interface attributes The AR 18-21B provides one console port, four Ethernet ports, and one ADSL2+ over ISDN interface. For their attributes, see the interface attributes of the models described in the preceding sections.
  • Page 35 Installation Manual H3C AR 18-3XE/18-21X Series Routers Table of Contents Table of Contents Chapter 2 Installing the Router ............2-1 2.1 Safety Precautions .............2-1 2.2 Installing the Router ............2-2 2.2.1 Placing the Router on a Tabletop/Workbench ..2-2 2.2.2 Mounting the Router on a Vertical Surface .....2-3 2.3 Connecting the Power Cord..........2-4...

  • Page 36: Chapter 2 Installing The Router

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router Chapter 2 Installing the Router 2.1 Safety Precautions Caution: Observe the safety precautions in this section when installing or maintaining your router to avoid bodily injuries or device impairment caused by improper actions.

  • Page 37: Installing The Router

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router For power supply, use a single-phase three-line power socket with a ground contact or use a universal PC power socket, making sure that the ground contact is well connected to the building ground.

  • Page 38: Mounting The Router On A Vertical Surface

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router 2.2.2 Mounting the Router on a Vertical Surface Mount the router on a vertical surface with four pan-head screws and the four brackets at the bottom of the router.

  • Page 39: Connecting The Power Cord

    Step 2: Hang the router on the screws by the four brackets. 2.3 Connecting the Power Cord I. AC-input power supply For the AR 18-3XE/18-21X series, an external AC-input power supply is provided with these specifications: Input rated voltage: 100 VAC to 240 VAC, 50 Hz to 60 Hz Input current: 0.5 A to 1 A...
  • Page 40 Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router Figure 2-2 Power supply II. Connecting the AC-input power cord Step 1: Put the power switch of the router in OFF position. Step 2: Connect the output of the power supply to the power input on the rear panel of the router, and then insert the input connector of the power supply into an AC power outlet.

  • Page 41: Connecting The Router To A Console Terminal

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router 2.4 Connecting the Router to a Console Terminal I. Console cable The console cable has an RJ-45 connector at one end and a DB-9 (female) connector at the other end.

  • Page 42: Connecting The Router To Ethernet

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router 2.5 Connecting the Router to Ethernet I. Ethernet cable A 10/100BASE-TX Ethernet interface is usually connected to an Ethernet using a category 5 twisted pair cable, as shown in Figure 2-4:...
  • Page 43 Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router Caution: Use shielded cables to make network cables so long as you can for electromagnetic compatibility sake. II. Connecting the Ethernet port Caution: Before connecting a port, read its label carefully; a wrong connection can damage your router.

  • Page 44: Connecting The Router To Wan

    Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router 2.6 Connecting the Router to WAN The AR 18-3XE/18-21X series provides two types of WAN interfaces: ISDN S/T and ADSL2+. The following subsections describe how to connect them. 2.6.1 Connecting the ISDN Interface I.

  • Page 45: Connecting The Adsl2+ Interface

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router For an ISDN U line, you need a NT1 adapter. Then, connect one end of the ISDN S/T cable to the ISDN port on the NT1 adapter, and the other end to the ISDN BRI port on the router.
  • Page 46 Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router Step 1: Plug one end of a telephone cable into the ADSL2+ over POTS port on the router, and the other end into the internal Modem port on the splitter.

  • Page 47: Verifying Installation

    Installation Manual Chapter 2 Installing the H3C AR 18-3XE/18-21X Series Routers Router Step 3: Connect the external Line port on the splitter to the ISDN network with a third telephone cable. ISDN RJ-11 port ISDN ISDN ISDN ISDN NT1 port...
  • Page 48 Installation Manual H3C AR 18-3XE/18-21X Series Routers Table of Contents Table of Contents Chapter 3 Starting and Maintaining the Router......3-1 3.1 Starting Up the Router ............3-1 3.1.1 Setting Up a Configuration Environment....3-1 3.1.2 Powering On the Router..........3-5 3.2 Maintaining the Router............3-7 3.2.1 Boot Menu ...............3-7...

  • Page 49: Chapter 3 Starting And Maintaining The Router

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Chapter 3 Starting and Maintaining the Router 3.1 Starting Up the Router 3.1.1 Setting Up a Configuration Environment I. Connecting the router to a console terminal...
  • Page 50 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Start the PC and select [Start/Programs/Accessories/ Communications/ HyperTerminal]. HyperTerminal window displays the Connection Description dialog box, as shown in Figure 3-2. Figure 3-2 Set up a new connection Enter the name of the new connection in the Name field and click <OK>.
  • Page 51 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-3 Set the connection port Click <OK>. The Port Settings tab, as shown in Figure 3-4, appears, where you can set serial port parameters as...
  • Page 52 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-4 Set communications parameters Click <OK>. The HyperTerminal dialogue box appears. Select Properties. In the Properties dialog box, select the Settings tab, as shown in Figure 3-5.

  • Page 53: Powering On The Router

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-5 Set the terminal type 3.1.2 Powering On the Router The standard flash size of the router is 16 MB. After the router is powered on, the Boot Rom program runs first and the following system information appears on the terminal screen: Starting at 0x81500000...
  • Page 54 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router ******************************************** Copyright (c) 2004-2007 by Hangzhou H3C Technologies Co., Ltd. Testing memory...OK! bytes SDRAM 16384k bytes flash memory Hardware Version is MTR 3.0 CPLD Version is CPLD 1.0 Press Ctrl-B to enter Boot Menu To enter the Boot Menu, press <Ctrl+B>...

  • Page 55: Maintaining The Router

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router 3.2 Maintaining the Router 3.2.1 Boot Menu Start the router. When the information “Press Ctrl-B to enter Boot Menu” appears on the terminal screen, press <Ctrl+B>. The system...
  • Page 56 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Enter debugging environment Boot Rom Operation Menu Do not check the version of the software Exit and reboot Enter your choice(1-a): Note that: Download an application program through XModem. For more information, refer to the section 3.2.2...
  • Page 57 Press <3> to return to the main menu. Set application file type The AR 18-3XE/18-21X series is available with the dual image function. By default, the system defines and attempts to boot in order with three boot files: main, backup, and secure, provided they are available from Flash memory;...
  • Page 58 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Table 3-1 Default names and types of the boot files Boot file File name File type Main boot file main.bin Backup boot file backup.bin Secure boot file secure.bin...
  • Page 59 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router secure boot file with the rename command after the system boots, the file is removed from Flash memory. To use the secure boot file after that, you need to download it again.
  • Page 60 Press <Enter> key to continue Press <Enter> to return to Boot Menu. Clear application password This function is not available yet on the AR 18-3XE/18-21X series at present. Start up the router with the initial configuration, ignoring the configuration file.
  • Page 61 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Enter the debugging environment. Caution: Upgrade the entire Boot Rom program only when necessary and under the guide of an engineer. When doing this, make sure that the Boot Rom software version can work with the version of the adopted application program.

  • Page 62: Upgrading Programs Through Xmodem

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Ignore the software version of the extended Boot Rom program segment for backward compatibility. If you fail to upgrade software because the system considers that you are using an “invalid version”...
  • Page 63 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Select an appropriate download speed (for example, 115,200 bps by entering <5>). The following message appears: Download speed is 115200 bps. Change the terminal's speed to 115200 bps, and select XModem protocol. Press ENTER key when ready.
  • Page 64 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-6 Send File dialog box Click <Browse>. Select the application file to be downloaded and set protocol to XModem. Click <Send>. The following interface pops up:...
  • Page 65 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Writing to flash memory... Please wait,it needs a long time .Please wait... ####################################################### Writing FLASH Success. Please use 9600 bps.Press <ENTER> key to reboot the system.
  • Page 66 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Caution: Upgrade the entire Boot Rom program only when necessary and under the guide of an engineer. On-site Boot Rom program restoration is not available yet to remedy an upgrading failure.

  • Page 67: Backing Up And Restoring The Extended Segment Of The Boot Rom Program

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router 3.2.3 Backing Up and Restoring the Extended Segment of the Boot Rom Program I. Backing up the extended segment of the Boot Rom program to the Flash...

  • Page 68: Upgrading Boot Rom At Cli

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router If the operation is successful, the system displays: Writing to Boot Rom.Please wait...###### Restoring Boot Rom program successed! When the sub-menu appears again, press <5> to exit and reboot the router.
  • Page 69 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-8 TFTP server program interface Configure the router to download the Boot ROM upgrade file from the TFTP server. <H3C> tftp 1.1.1.1 get bootromfull As shown in the above display, 1.1.1.1 is the IP address of the TFTP server, and bootromfull is the Boot ROM upgrade file.
  • Page 70 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Caution!!! upgrade bootrom [Y/N]?y Please wait, it may take a long time The upgrade succeeds! After the upgrade operation is complete, restart the router so that the upgrade made to the Boot ROM takes effect. After...
  • Page 71 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Figure 3-9 FTP server program interface Configure the router to download the Boot ROM upgrade file from the FTP server. <H3C> ftp 1.1.1.1 Trying 1.1.1.1 ...

  • Page 72: Upgrading Application Programs With Net

    Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Execute the following command on the router to upgrade Boot ROM. <H3C> system-view [H3C] upgrade bootrom full WARNING: This operation will update the Boot ROM. It may result in booting failure.
  • Page 73 H3C AR 18-3XE/18-21X Series Routers Maintaining the Router Caution: The AR 18-3XE/18-21X series does not provide any TFTP or FTP server. You need to purchase and install one. Follow these steps to upgrade an application program through TFTP or FTP:...
  • Page 74 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router file name: name of the file to be loaded. inet on ethernet (e): IP address of the interface used for downloading on the router host inet (h): IP address of the FTP server...
  • Page 75 Installation Manual Chapter 3 Starting and H3C AR 18-3XE/18-21X Series Routers Maintaining the Router NET download completed... read len = [06200718] Please select file to be saved as 1. Main application file 2. Backup application file 3. Secure application file 4.
  • Page 76 Installation Manual H3C AR 18-3XE/18-21X Series Routers Table of Contents Table of Contents Chapter 4 Troubleshooting............4-1 4.1 Troubleshooting the Power System ........4-1 4.2 Troubleshooting the Configuration System......4-1 4.3 Dealing with a Boot Rom Password Loss......4-3...

  • Page 77: Chapter 4 Troubleshooting

    Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 4 Troubleshooting Chapter 4 Troubleshooting 4.1 Troubleshooting the Power System Symptom: PWR LED does not light. Solution: Check that: The power switch of the router is turned on. The switch of the power source is turned on.
  • Page 78 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 4 Troubleshooting banner; if faults occur to the configuration system, the console screen displays illegible characters or nothing at all. Symptom 1: Nothing is displayed on the console screen after the router is powered on.
  • Page 79 Installation Manual H3C AR 18-3XE/18-21X Series Routers Chapter 4 Troubleshooting 4.3 Dealing with a Boot Rom Password Loss If the Boot Rom password of the router is lost, contact your agent for help.

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