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Cisco 2611 - Router - EN User Manual
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Cisco 2611 - Router - EN User Manual

Cisco 2611 - Router - EN User Manual

2600 series
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See also: Configuration Manual , Operation

About This Guide

This preface discusses the objectives, audience, organization, and conventions of this
hardware installation guide.
Objectives
This publication will step you through the initial site preparation and installation of the
router. Troubleshooting, maintenance procedures, and cable specifications are also
provided.
Although this document provides minimum software configuration information, it is not
meant as comprehensive router configuration instructions. For detailed software
configuration information, refer to the Cisco IOS configuration guide and command
reference publications. These publications are available on the Documentation CD-ROM
that came with your router, or you can order printed copies. See the "Ordering
Documentation" section on page xi.
This publication describes a variety of router models that are similar in functionality, but
differ in the number of interfaces supported. Some information provided may not apply to
your particular router model.
Audience
This publication is designed for the person installing the router, who should be familiar with
electronic circuitry and wiring practices and has experience as an electronic or
electromechanical technician.
About This Guide v

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Summary of Contents for Cisco 2611 - Router - EN

  • Page 1: About This Guide

    Although this document provides minimum software configuration information, it is not meant as comprehensive router configuration instructions. For detailed software configuration information, refer to the Cisco IOS configuration guide and command reference publications. These publications are available on the Documentation CD-ROM that came with your router, or you can order printed copies.
  • Page 2 The major sections of this hardware installation guide are as follows: Table 1 Document Organization Chapter Title Description Chapter 1 Overview of Cisco 2600 Discusses the features and specifications Series Routers of the routers. Chapter 2 Preparing to Install the Discusses environmental requirements,...
  • Page 3 Conventions Conventions This publication uses the following conventions to convey instructions and information: Table 2 Installation Guide Conventions Convention Description boldface font Commands and keywords. italic font Variables for which you supply values. Keywords or arguments that appear within square brackets are optional. {x | y | z} A choice of required keywords appears in braces separated by vertical bars.
  • Page 4 Conventions Table 2 Installation Guide Conventions (continued) Convention Description Varoitus Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).
  • Page 5 Obtaining Service and Support For service and support for a router purchased from a reseller, contact the reseller. Resellers offer a wide variety of Cisco service and support programs, which are described in the information packet that shipped with your router.

  • Page 6: Cisco Connection Online

    Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco’s Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.

  • Page 7: Ordering Documentation

    World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com. If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
  • Page 8 Ordering Documentation Book Title...

  • Page 9: Hardware Features

    Table 1-1 lists the router models discussed in this publication and provides a summary of the LAN interfaces supported on each model. These router models are similar in functionality, but differ in the number of interfaces supported. Table 1-1 Summary of Cisco 2600 Series LAN Interfaces Advanced Fast Network...
  • Page 10 • EIA/TIA-232 (RJ-45) auxiliary port for remote system access or dial backup using a modem Figure 1-1 through Figure 1-6 show the rear panels of the Cisco router models discussed in this publication. Figure 1-1 Cisco 2610 Router Rear Panel...
  • Page 11 50/60 Hz 47 W CONN SERIAL 0 CONN 2A/S CONN CONN SEE MANUAL BEFORE INSTALLATION SEE MANUAL BEFORE INSTALLATION LINK TOKEN RING 0/0 CONSOLE Token Ring 0/0 (RJ-45) Auxiliary port (RJ-45) Console port (RJ-45) Overview of Cisco 2600 Series Routers 1-3...
  • Page 12 WAN interface cards, see the publication Cisco WAN Interface Cards Hardware Installation Guide. These manuals are also on the Documentation CD-ROM that accompanied your router and on Cisco Connection Online. (See the “Ordering Documentation” section on page xi and the section Cisco Connection Online on page x.) Book Title...
  • Page 13 38 dBa minimum Regulatory compliance FCC Class B and Canadian DOC Class A For more regulatory information, refer to the Regulatory Compliance and Safety Information document that accompanied your router. Btus = British thermal units. Overview of Cisco 2600 Series Routers 1-5...
  • Page 14 EN55022/FCC Class B Compliance The equipment described in this document generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications...

  • Page 15: Preparing To Install The Router

    C H A P T E R Preparing to Install the Router This chapter describes important information to consider before you begin to install a Cisco 2600 series router, and includes the following sections: • Safety Recommendations on page 2-1 •...

  • Page 16: Safety Warnings

    Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or can weld the metal object to the terminals. Cisco 2600 Series Hardware Installation Guide...
  • Page 17 Maintaining Safety with Electricity Before working on a chassis or working near power supplies, unplug the power Warning cord on AC units; disconnect the power at the circuit breaker on DC units. Do not touch the power supply when the power cord is connected. For systems Warning with a power switch, line voltages are present within the power supply even when the power switch is OFF and the power cord is connected.

  • Page 18: Preventing Electrostatic Discharge Damage

    1 to 10 megohms (Mohm). General Site Requirements This section describes the requirements your site must meet for safe installation and operation of your system. Ensure that your site is properly prepared before beginning installation. Cisco 2600 Series Hardware Installation Guide...

  • Page 19: Site Environment

    Site Environment Site Environment The router can be placed on a desktop or mounted in a rack or on a wall. The location of the chassis and the layout of your equipment rack or wiring room are extremely important for proper system operation. Placing equipment too close together, inadequate ventilation, and inaccessible panels can make system maintenance difficult or cause system malfunctions and shutdowns.
  • Page 20 This product relies on the building’s installation for short-circuit (overcurrent) Warning protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors). Cisco 2600 Series Hardware Installation Guide...

  • Page 21: Preparing To Connect To A Network

    The Ethernet interfaces available for the Cisco 2610, Cisco 2611, and Cisco 2612 routers operate at speeds up to 10 Mbps. The Ethernet interfaces available for the Cisco 2620 and Cisco 2621 routers operate at speeds up to 100 Mbps.
  • Page 22 Preparing to Connect to a Network The Cisco 2610 provides a single Ethernet 10BaseT port and the Cisco 2611 provides two Ethernet 10BaseT ports. (See Figure 2-1 and Figure 2-2.) The Cisco 2612 provides one Ethernet 10BaseT port and one Token Ring port. (See Figure 2-3.) The Cisco 2620 provides one 10/100BaseT Ethernet port.
  • Page 23 Ethernet Connections Figure 2-2 Cisco 2611 Ethernet Connections Link Link SERIA L 1 SERIA L 1 Cis co 26 11 SERIA L 0 SERIA L 0 CONN 2A/S CONN CONN 2A/S SEE MANU AL BEFO RE INSTA LLATI SEE MANU AL BEFO RE INSTA LLATI...
  • Page 24 Preparing to Connect to a Network Figure 2-3 Cisco 2612 Ethernet and Token Ring Connections Link Link SERIA L 1 SERIA L 1 Cis co 26 12 SERIA L 0 SERIA L 0 CONN 2A/S CONN CONN 2A/S SEE MANU AL BEFO RE INSTA LLATI...
  • Page 25 Ethernet Connections Figure 2-5 Cisco 2621 Fast Ethernet Connections Mbps Mbps Link Link SERIA L 1 SERIA L 1 Cis co 26 21 SERIA L 0 CONN SERIA L 0 CONN 2A/S CONN CONN 2A/S SEE MANU AL BEFO RE INSTA LLATI...

  • Page 26: Token Ring Connections

    Preparing to Connect to a Network Token Ring Connections The Cisco 2612 provides both an Ethernet interface and a Token Ring shielded UTP interface. (See Figure 2-6.) The Cisco 2613 provides a single Token Ring interface. (See Figure 2-7.) Figure 2-6...
  • Page 27 Use the provided Token Ring cable to connect the router to a switch. Refer to the section “Token Ring Port Pinouts” in the online document Cisco Modular Access Router Cabling Specifications for the Token Ring port pinouts. This document is on the Documentation CD-ROM that accompanied your router package, and on Cisco Connection Online.

  • Page 28: Serial Connections

    2-slot chassis; the network module can be installed in the Cisco 2600 series single network module slot. For more information on WAN interface cards, see the publication Cisco WAN Interface Cards Hardware Installation Guide.
  • Page 29 Signaling Standards Supported The synchronous serial ports available for the router support the following signaling standards: EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530. You can order a Cisco DB-60 shielded serial transition cable that has the appropriate connector for the standard you specify.
  • Page 30 Although manufacturing your own serial cables is not recommended (because of the small size of the pins on the DB-60 serial connector), cable pinouts are provided in the online document Cisco Modular Access Router Cabling Specifications on the Documentation CD-ROM that accompanied your router, and on Cisco Connection Online.
  • Page 31 Serial Connections Balanced drivers allow EIA/TIA-449 signals to travel greater distances than EIA/TIA-232 signals. The recommended distance limits for EIA/TIA-449 shown in Table 2-2 are also valid for V.35, X.21, and EIA-530. Typically, EIA/TIA-449 and EIA-530 can support 2-Mbps rates, and V.35 can support 4-Mbps rates. Asynchronous/Synchronous Serial Module Baud Rates The following baud-rate limitations apply to the slow-speed serial interfaces found in the asynchronous/synchronous serial modules:...
  • Page 32 The network end of the V.35 adapter cable provides a standard 34-pin Winchester-type connector. (See Figure 2-10.) V.35 cables are available with a standard V.35 plug or receptacle in either DTE or DCE mode. Figure 2-10 V.35 Adapter Cable Connectors, Network End 2-18 Cisco 2600 Series Hardware Installation Guide...
  • Page 33 Serial Connections X.21 Connections The X.21 interface uses a 15-pin connection for balanced circuits and is commonly used in the United Kingdom to connect public data networks. X.21 relocates some of the logic functions to the DTE and DCE interfaces and, as a result, requires fewer circuits and a smaller connector than EIA/TIA-232.
  • Page 34 EIA-530 adapter cable is a standard DB-25 plug commonly used for EIA/TIA-232 connections. Figure 2-12 shows the DB-25 connector at the network end of the adapter cable. Figure 2-12 EIA-530 Adapter Cable Connector, Network End 2-20 Cisco 2600 Series Hardware Installation Guide...
  • Page 35 Serial Connections Figure 2-13 shows the serial transition cables you can connect to the DB-60 port on the asynchronous/synchronous serial modules and serial WAN interface card. Figure 2-13 Serial Interface Adapter Cables Router connections EIA/TIA-232 EIA/TIA-449 V.35 X.21 EIA-530 Network connections at the modem or CSU/DSU Preparing to Install the Router 2-21...

  • Page 36: Isdn Bri Connections

    Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN. Table 2-3 lists the specifications for ISDN BRI cables. Also, refer to the online document Cisco Modular Access Router Cabling Specifications for pinouts. This document is located on both the Documentation CD-ROM that accompanied your router package, and Cisco Connection Online.
  • Page 37 Distance limitation 32.8' (10 m) 32.8' (10 m) nF = nanoFarad. For more information on BRI WAN interface cards, see the publication Cisco WAN Interface Cards Hardware Installation Guide. 56K/Switched-56-kbps DSU/CSU Connections Switched-56-kbps connections are provided by the 56-kbps DSU/CSU WAN interface card.
  • Page 38 Preparing to Connect to a Network 2-24 Cisco 2600 Series Hardware Installation Guide...

  • Page 39: Table Of Contents

    C H A P T E R Installing the Router This chapter guides you through the installation of the Cisco 2600 series routers and includes the following sections: • Required Tools and Equipment on page 3-2 • Setting Up the Chassis on page 3-3 •...

  • Page 40: Required Tools And Equipment

    For more information on cable specifications, see the document Cisco Modular Note Access Router Cabling Specifications on the Documentation CD-ROM that accompanied your router package, and on Cisco Connection Online. For cable ordering information, see the “Obtaining Service and Support” section on page ix. •...

  • Page 41: Setting Up The Chassis

    Setting Up the Chassis Setting Up the Chassis You can set the chassis on a desktop, install it in a rack, or mount it on a wall or other flat surface. Use the procedure in this section that best meets the needs of your network. The sections are as follows: •...
  • Page 42 Place the router right-side up on a flat, smooth, secure surface. Do not place anything on top of the router that weighs more than 10 pounds Caution (4.5 kg). Excessive weight on top could damage the chassis. Cisco 2600 Series Hardware Installation Guide...

  • Page 43: Mounting The Chassis In A Rack

    Mounting the Chassis in a Rack Mounting the Chassis in a Rack This section describes the procedures for rack-mounting the chassis. The chassis comes with brackets for use with a 19-inch rack or, if specified in your order, optional larger brackets for use with a 24-inch rack.
  • Page 44 The second bracket connects to the opposite side of the chassis. Figure 3-4 Bracket Installation—Front Panel Forward 24 in. brackets 19 in. brackets Figure 3-5 Bracket Installation—Rear Panel Forward 24 in. brackets 19 in. brackets Cisco 2600 Series Hardware Installation Guide...
  • Page 45 Mounting the Chassis in a Rack Figure 3-6 Telco Bracket Installation—Rear Panel Forward 24 in. brackets 19 in. brackets Installing the Router in a Rack After the brackets are secured to the chassis, you can rack-mount it. Using the screws you provide, attach the chassis to the rack as shown in Figure 3-7.

  • Page 46: Mounting The Chassis On The Wall

    • For the best ventilation of the chassis, mount the chassis with the power supply and fan at the top. Make sure there is clearance between the router and the wall. Cisco 2600 Series Hardware Installation Guide...
  • Page 47 Mounting the Chassis on the Wall Figure 3-9 Mounting the Chassis on the Wall Installing the Router 3-9...

  • Page 48: Connecting The Dc Power Supply

    The DC power supply is intended for use in DC-operating environments. Table 3-1 lists the power supply specifications. Table 3-1 DC Power Supply Specifications Design Description Specification Power (input) 65W, –40 to –72 VDC Wire gauge for power connections 14 AWG AWG = American Wire Gauge. 3-10 Cisco 2600 Series Hardware Installation Guide...
  • Page 49 Wiring the DC Power Supply Wiring the DC Power Supply If you ordered a router with a DC power supply, follow the directions in this section to wire the terminal block. Before performing any of the following procedures, ensure that power is Warning removed from the DC circuit.
  • Page 50 Take the following steps to wire the terminal block: Step 1 Attach the appropriate lugs at the wire end of the power supply cord. Step 2 Wire the DC power supply to the terminal block, as shown in Figure 3-10. 3-12 Cisco 2600 Series Hardware Installation Guide...
  • Page 51 Wiring the DC Power Supply Figure 3-10 DC Power Supply Connections Input: –40 – –72V Current: 1.5 –1.0A Watts: 40W Terminal block Negative On/off Ground Positive switch Terminal block cover Terminal block Installing the Router 3-13...

  • Page 52: Connecting To A Network

    Depending on your router model, do one of the following to connect your router to a network: • Cisco 2610 or Cisco 2611—Connect the Ethernet 10BaseT port to an Ethernet hub, as shown in Figure 3-11. Or, connect the Ethernet 10BaseT port directly to a switch such as a Cisco Catalyst 3900.
  • Page 53 • Cisco 2612 or Cisco 2613—Connect the Token Ring port (RJ-45) to a switch such as a Cisco Catalyst 3900, as shown in Figure 3-12. To ensure agency compliance with electromagnetic emissions requirements (EMI), ensure that the lobe cable is shielded.
  • Page 54 Catalyst 3900 RJ-11 twisted-pair • Cisco 2620 or Cisco 2621—Connect the Ethernet 10/100BaseT port to an Ethernet hub, as shown in Figure 3-13. Or, connect the Ethernet 10/100BaseT port directly to a switch such as a Cisco Catalyst 3900. 3-16...
  • Page 55 Connecting to a Network Figure 3-13 Connecting an Ethernet Hub SERIAL 1 SERIAL 1 Cisco 2611 100-240V – 1A SERIAL 0 50/60 Hz 47 W CONN SERIAL 0 CONN 2A/S CONN CONN 2A/S SEE MANUAL BEFORE INSTALLATION SEE MANUAL BEFORE INSTALLATION...

  • Page 56: Connecting The Console Terminal And Modem

    (See Figure 3-14.) If your cable came from Cisco Systems, pin 1 will be white on one connector, and pin 8 will be white on the other (a rollover cable reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5).

  • Page 57: Connecting To The Console Port

    Step 2 8 data bits, no parity, and 2 stop bits. For information on console port pinouts, see the online document Cisco Modular Access Router Cabling Specifications on the Documentation CD-ROM that accompanied your router package, and on Cisco Connection Online.
  • Page 58 CONN SEE MANUAL BEFORE INSTALLATION 2A/S SEE MANUAL BEFORE INSTALLATION LINK ETHERN ET 1 LINK ETHERN ET 0 ACT CONSOL E Console port (RJ-45) RJ-45-to-RJ-45 rollover cable Laptop computer RJ-45-to-DB-9 or RJ-45-to-DB-25 adapter 3-20 Cisco 2600 Series Hardware Installation Guide...

  • Page 59: Connecting A Modem To The Auxiliary Port

    This equipment is intended to be grounded. Ensure that the host is connected Warning to earth ground during normal use. For information on console port pinouts, see the online document Cisco Modular Access Router Cabling Specifications on the Documentation CD-ROM that accompanied your router package, and on Cisco Connection Online.

  • Page 60: What To Do After Installing The Router Hardware

    ON. (If the router does not power on, proceed to Appendix A “Troubleshooting the Router.”) Use the Software Configuration Guide (for Cisco 3600 series and Cisco 2600 series routers) included in your router package for initial software configuration information.

  • Page 61: Maintaining The Router

    A P P E N D I X Maintaining the Router This appendix contains selected maintenance procedures you might need to perform on a Cisco 2600 series router as your internetworking needs change. This appendix includes the following sections: •...

  • Page 62: Upgrading Dram

    You might need to upgrade DRAM for the following reasons: • You have upgraded to a new Cisco IOS software feature set or release. • You are using very large routing tables or many protocols (for example, when the router is set up as part of both a large external network and your internal network).

  • Page 63: Opening The Chassis

    Opening the Chassis Opening the Chassis This section describes the procedure for opening the chassis by removing the chassis cover. Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is OFF and the power cord is connected.
  • Page 64 Opening the Chassis Figure B-1 Holding Chassis for Cover Removal Cisco 2600 SERIES POWER ACTIVITY Figure B-2 Removing Chassis Cover Cisco 2600 SERIES POWER ACTIVITY Cisco 2600 Series Hardware Installation Guide...
  • Page 65 Removing the Chassis Cover When the top cover is off, set it aside. Figure B-3 shows the layout of the Step 6 system cards. Figure B-3 System Card Layout Duart reset Reset Pin 1 Primary memory Boot (DRAM DIMMs) System-code SIMM (Flash memory) Advanced Interface Lattice...
  • Page 66 Figure B-4. Be careful not to break the holders on the DIMM connector. To prevent damage, do not press on the center of the DIMMs. Handle each Caution DIMM carefully. Cisco 2600 Series Hardware Installation Guide...
  • Page 67 DRAM DIMM Installation Position the new DIMM so that the polarization notch is located at the left end Step 5 of the DIMM socket as shown in Figure B-4. Figure B-4 Removing and Replacing the DRAM DIMM Maintaining the Router B-7...

  • Page 68: Tools Required

    The system code is stored on the Flash memory SIMM, but new system-code SIMMs are shipped without preinstalled software. Before continuing with this procedure, use the copy flash tftp EXEC command to back up the system code to a Trivial File Transfer Protocol (TFTP) server. Cisco 2600 Series Hardware Installation Guide...
  • Page 69 Cisco IOS configuration and command reference publications. These publications are available on the Documentation CD-ROM that came with your router, and on Cisco Connection Online. You can also order printed copies. See the “Ordering Documentation” on page xi for ordering information.
  • Page 70 To prevent damage, note that some Flash memory SIMMs have the components mounted on the rear side; therefore, when inserting the SIMM, always use the polarization notch as a reference and not the position of the components on the SIMM. B-10 Cisco 2600 Series Hardware Installation Guide...

  • Page 71: Closing The Chassis

    Replace the router cover following the procedure in the following section. Refer to the “Procedures for Recovering Boot and System Images” section on Step 11 page C-9 for instructions on how to place the Cisco IOS image on the new SIMM. Closing the Chassis This section describes the procedure for closing the chassis by replacing the cover.
  • Page 72 Closing the Chassis Reinstall the chassis on the wall, rack, desktop, or table. Step 5 Reconnect all cables. Step 6 B-12 Cisco 2600 Series Hardware Installation Guide...

  • Page 73: Isolating Problems

    A P P E N D I X Troubleshooting the Router This appendix contains information about isolating problems with the router and includes the following sections: • Isolating Problems on page A-1 • Reading the LEDs on page A-3 For information about obtaining technical support, see the “Obtaining Service and Support”...

  • Page 74: Troubleshooting The Power And Cooling Systems

    • If the system boots, but the console screen is frozen, verify that the console is configured for 9600 baud, 8 data bits, no parity, and 2 stop bits. Cisco 2600 Series Hardware Installation Guide...

  • Page 75: Reading The Leds

    Figure A-1 shows the location of the LEDs on the front panel of the Cisco 2600 series routers. Table A-1 describes these LEDs.
  • Page 76 Reading the LEDs Figure A-2 shows the location of the Cisco 2610 rear-panel LEDs and Figure A-3 shows the location of the Cisco 2611 rear-panel LEDs. Table A-2 describes these LEDs. Figure A-2 Cisco 2610 Rear-Panel LEDs Link SERIA L 1...
  • Page 77 Packets are being transmitted or received on the Ethernet interface. Figure A-4 shows the location of the Cisco 2612 rear-panel LEDs and Figure A-5 shows the location of the Cisco 2613 rear-panel LEDs. Table A-3 describes these LEDs. Troubleshooting the Router A-5...
  • Page 78 SEE MANU AL BEFO RE INSTA LLATI SEE MANU AL BEFO RE INSTA LLATI LIN K TOK EN RIN G 0/0 CON SOL E Token Ring 0/0 Auxiliary (RJ-45) port (RJ-45) Console port (RJ-45) Cisco 2600 Series Hardware Installation Guide...
  • Page 79 Packets are being transmitted or received on the Ethernet interface. Figure A-6 shows the location of the Cisco 2620 rear-panel LEDs and Figure A-7 shows the location of the Cisco 2621 rear-panel LEDs. Table A-4 describes these LEDs. Figure A-6...
  • Page 80 Console Ethernet 0/1 port (RJ-45) (RJ-45) Table A-4 Cisco 2620 and Cisco 2621 Rear-Panel LEDs Description LINK When on, a link has been established with the hub or switch at the other end of the cable. When on, interface is in full duplex mode. When out, interface is in half duplex mode.

  • Page 81: Entering The Rom Monitor Mode

    This appendix describes using the ROM monitor (also called the bootstrap program), which is the firmware that runs when you power on or restart a Cisco 2600 series router. During normal operation, the ROM monitor helps to initialize the processor hardware and boot the operating system software.
  • Page 82 Tips From the Cisco IOS software, you can configure the router to automatically enter the ROM monitor mode the next time the router boots by setting virtual configuration register bits 3, 2, 1, and 0 to zero.

  • Page 83: Rom Monitor Commands

    ROM Monitor Commands ROM Monitor Commands Enter ? or help at the ROM monitor mode prompt to display a list of available commands. For example: rommon 1 > alias set and display aliases command boot boot up an external process break set/show/clear the breakpoint confreg...

  • Page 84: Rom Monitor Syntax Conventions

    Command Descriptions This section lists some useful ROM monitor commands. Refer to the Cisco IOS configuration guides and command references for more information on ROM monitor commands.
  • Page 85 Cisco 2600 series routers do not have a dedicated boothelper image ([rx]boot) as used by some other Cisco routers. With Cisco 2600 series routers, the first image in Flash memory is invoked as the default boothelper image anytime the ROM monitor does not recognize the device ID in the boot command.
  • Page 86 8M-DUAL 8M-DUAL 32M-DUAL 8M-DUAL 32M-DUAL 32M-DUAL 32M-DUAL 32M-DUAL 8M-DUAL 32M-DUAL 32M-DUAL 32M-DUAL • reset or i—Reset and initialize the router, similar to power on. • tftpdnld—Download an image using TFTP from a remote server. Cisco 2600 Series Hardware Installation Guide...

  • Page 87: Debugging Commands

    Debugging Commands Debugging Commands Most debugging commands are functional only when Cisco IOS software has crashed or is aborted. If you enter a debugging command and Cisco IOS crash information is not available, the following error message appears: “xxx: kernel context state is invalid, can not proceed.”...
  • Page 88 9600 boot: the ROM Monitor do you wish to change the configuration? y/n [n]: You must reset or power cycle for new config to take effect Cisco 2600 Series Hardware Installation Guide...

  • Page 89: Procedures For Recovering Boot And System Images

    Procedures for Recovering Boot and System Images If your Cisco 2600 series router experiences difficulties and no longer contains a valid Cisco IOS software image in Flash memory, you can recover the Cisco IOS image using one of the following ROM monitor commands: •...

  • Page 90: Using The Tftpdnld Command

    The tftpdnld command downloads a Cisco IOS software image from a remote server accessible from an Ethernet or Token Ring network interface on a Cisco 2600 series router. The tftpdnld command downloads the Cisco IOS software image into Flash memory using TFTP.
  • Page 91 Using the tftpdnld Command The following tftpdnld command variables are optional: • TFTP_VERBOSE—Print setting. The default is 1. — 0=quiet—After you enter the tftpdnld command, the prompt Do you wish to continue? y/n: is the only information that displays until the command completes successfully or fails.
  • Page 92 WARNING: all existing data in all partitions on flash will be lost! Do you wish to continue? y/n: [n]: Enter y to begin downloading the Cisco IOS software image. When the process is complete, the ROM monitor mode prompt appears on your screen.

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