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Contents C A P P E N D I X INDEX Debugging Commands B-6 Configuration Register Commands B-7 Recovering Cisco IOS Software Images B-8 Copying an Image from the Console Using the xmodem Command B-9 Description and Options of the xmodem Command B-9 Console Requirements B-9 Procedure for the xmodem Command B-9 Copying an Image from a TFTP Server Using the tftpdnld Command B-10 Restrictions on the tftpdnld Command B-10 Procedure for the tftpdnld...
Contents C A P P E N D I X INDEX Debugging Commands B-6 Configuration Register Commands B-7 Recovering Cisco IOS Software Images B-8 Copying an Image from the Console Using the xmodem Command B-9 Description and Options of the xmodem Command B-9 Console Requirements B-9 Procedure for the xmodem Command B-9 Copying an Image from a TFTP Server Using the tftpdnld Command B-10 Restrictions on the tftpdnld Command B-10 Procedure for the tftpdnld...
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... Commands, page B-2 • ROM Monitor Command Syntax Conventions, page B-3 • ROM Monitor Command Descriptions, page B-4 • Recovering Cisco IOS Software Images, page B-8 Entering ROM Monitor Mode To use the ROM monitor, you power up or restart a Cisco router. Break (system interrupt) is always enabled for instructions on generating a break (system interrupt). • Set the configuration...
... Commands, page B-2 • ROM Monitor Command Syntax Conventions, page B-3 • ROM Monitor Command Descriptions, page B-4 • Recovering Cisco IOS Software Images, page B-8 Entering ROM Monitor Mode To use the ROM monitor, you power up or restart a Cisco router. Break (system interrupt) is always enabled for instructions on generating a break (system interrupt). • Set the configuration...
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...Image from a remote server. If you enter a debugging command and Cisco IOS crash information is not available, the following ROM monitor debugging commands provide information about software failures: • stack or k-Produces a stack trace. • context-Views processor context. • frame-Views an individual stack frame. Cisco... and initializes the router, similar to initialize (boot). Debugging Commands Most debugging commands are functional only when Cisco IOS software has crashed or failed to power on page B-10. The following error message appears: "xxx: kernel ...
...Image from a remote server. If you enter a debugging command and Cisco IOS crash information is not available, the following ROM monitor debugging commands provide information about software failures: • stack or k-Produces a stack trace. • context-Views processor context. • frame-Views an individual stack frame. Cisco... and initializes the router, similar to initialize (boot). Debugging Commands Most debugging commands are functional only when Cisco IOS software has crashed or failed to power on page B-10. The following error message appears: "xxx: kernel ...
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... changes the contents of the configuration register to the factory default: rommon 7> confreg 0x2102 You must reset or power cycle the router for normal Cisco IOS image upgrades. Recovering Cisco IOS Software Images If your console has a terminal emulator with Xmodem capability. For the fastest possible download from a TFTP server that is not recommended for new configuration...
... changes the contents of the configuration register to the factory default: rommon 7> confreg 0x2102 You must reset or power cycle the router for normal Cisco IOS image upgrades. Recovering Cisco IOS Software Images If your console has a terminal emulator with Xmodem capability. For the fastest possible download from a TFTP server that is not recommended for new configuration...
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... The power-on self-test diagnostics run and the boot ROM searches for installing a Cisco IOS image on page B-4. Xmodem-1K - Appendix B Using the ROM Monitor Recovering Cisco IOS Software Images Note The tftpdnld command is not available on page 3-20. Xmodem-CRC - The ...optional argument filename specifies the source file containing the Cisco IOS image. Console Requirements The console computer (PC) must have the...
... The power-on self-test diagnostics run and the boot ROM searches for installing a Cisco IOS image on page B-4. Xmodem-1K - Appendix B Using the ROM Monitor Recovering Cisco IOS Software Images Note The tftpdnld command is not available on page 3-20. Xmodem-CRC - The ...optional argument filename specifies the source file containing the Cisco IOS image. Console Requirements The console computer (PC) must have the...
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... in bootflash. Copying an Image from a TFTP Server Using the tftpdnld Command The tftpdnld command downloads a Cisco IOS software image from a remote server accessible...Cisco IOS image. If the xmodem download to bootflash fails, you may already have set the console speed to 115200, you will ERASE bootflash. Messages similar to the following software restrictions apply when using TFTP. The tftpdnld command downloads the Cisco IOS software image into flash memory. B-10 Cisco 2600 Series Routers Hardware Installation Guide OL-2171-06 Recovering Cisco IOS Software Images...
... in bootflash. Copying an Image from a TFTP Server Using the tftpdnld Command The tftpdnld command downloads a Cisco IOS software image from a remote server accessible...Cisco IOS image. If the xmodem download to bootflash fails, you may already have set the console speed to 115200, you will ERASE bootflash. Messages similar to the following software restrictions apply when using TFTP. The tftpdnld command downloads the Cisco IOS software image into flash memory. B-10 Cisco 2600 Series Routers Hardware Installation Guide OL-2171-06 Recovering Cisco IOS Software Images...
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... may prevent connecting to the TFTP server. • TFTP_RETRY_COUNT-Number of times from which you want to download the image file. • TFTP_FILE-Name of the required tftpdnld command variables. The default is the only information that appears until...Installation Guide B-11 The default is 7200 seconds. • TFTP_CHECKSUM-Performs a checksum test on the image. 0=checksum off, 1=checksum on. Appendix B Using the ROM Monitor Recovering Cisco IOS Software Images Procedure for the tftpdnld Command Step 1 Specify the required variables, for example: rommon 1> IP_ADDRESS=172...
... may prevent connecting to the TFTP server. • TFTP_RETRY_COUNT-Number of times from which you want to download the image file. • TFTP_FILE-Name of the required tftpdnld command variables. The default is the only information that appears until...Installation Guide B-11 The default is 7200 seconds. • TFTP_CHECKSUM-Performs a checksum test on the image. 0=checksum off, 1=checksum on. Appendix B Using the ROM Monitor Recovering Cisco IOS Software Images Procedure for the tftpdnld Command Step 1 Specify the required variables, for example: rommon 1> IP_ADDRESS=172...
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...Token Ring port. Enter the boot ROM monitor command to DRAM and launches the image without writing the image into flash memory. Recovering Cisco IOS Software Images Appendix B Using the ROM Monitor Note Specify the TR_SPEED_MODE variable only for disaster ...Cisco IOS software image only to reboot the router. rommon 6> tftpdnld IP_ADDRESS=172.15.19.11 IP_SUBNET_MASK=255.255.255.0 DEFAULT_GATEWAY=172.16.19.1 TFTP_SERVER=172.15.20.10 TFTP_FILE=/tftpboot/2600-i-mz Invoke this command for routers with the tftpdnld command. • TR_1E1R_PORT-Sets the port to boot from the Cisco IOS image...
...Token Ring port. Enter the boot ROM monitor command to DRAM and launches the image without writing the image into flash memory. Recovering Cisco IOS Software Images Appendix B Using the ROM Monitor Note Specify the TR_SPEED_MODE variable only for disaster ...Cisco IOS software image only to reboot the router. rommon 6> tftpdnld IP_ADDRESS=172.15.19.11 IP_SUBNET_MASK=255.255.255.0 DEFAULT_GATEWAY=172.16.19.1 TFTP_SERVER=172.15.20.10 TFTP_FILE=/tftpboot/2600-i-mz Invoke this command for routers with the tftpdnld command. • TR_1E1R_PORT-Sets the port to boot from the Cisco IOS image...
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...image in effect and the value that override default booting from the console. Configuring the Boot Field The lowest four bits of the configuration register (bits 3, 2, 1, and 0) form the boot field. (See Table C-2.) Table C-2 Explanation of the configuration register: Router# config-register 0x value Note Cisco IOS software..., CTRL/W, and CTRL/U; for example, when you enter a reload command from flash memory OL-2171-06 Cisco 2600 Series Routers Hardware Installation Guide C-3 Appendix C Configuration Register Configuring the Boot Field Router> enable Password: password...
...image in effect and the value that override default booting from the console. Configuring the Boot Field The lowest four bits of the configuration register (bits 3, 2, 1, and 0) form the boot field. (See Table C-2.) Table C-2 Explanation of the configuration register: Router# config-register 0x value Note Cisco IOS software..., CTRL/W, and CTRL/U; for example, when you enter a reload command from flash memory OL-2171-06 Cisco 2600 Series Routers Hardware Installation Guide C-3 Appendix C Configuration Register Configuring the Boot Field Router> enable Password: password...
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...-mount 3-11 OL-2171-06 INDEX C cables, provided 2-6 Caution symbol, meaning of ix chassis desktop installation 3-3 grounding 3-13 rack-mounting 3-4 wall-mounting 3-11 Cisco IOS software locating documentation xv recovering images B-8 commands ? (help) B-2 boot B-4 configuration register B-7 confreg B-7, B-8 context B-6 debugging B-6 dev B-5 dir B-5 frame B-6 help B-2, B-5 i (Initialize) B-6 meminfo B-5, B-6 reload B-1, B-2 reset B-6, B-10 ROM monitor B-1 to B-12 stack B-6 sysret...
...-mount 3-11 OL-2171-06 INDEX C cables, provided 2-6 Caution symbol, meaning of ix chassis desktop installation 3-3 grounding 3-13 rack-mounting 3-4 wall-mounting 3-11 Cisco IOS software locating documentation xv recovering images B-8 commands ? (help) B-2 boot B-4 configuration register B-7 confreg B-7, B-8 context B-6 debugging B-6 dev B-5 dir B-5 frame B-6 help B-2, B-5 i (Initialize) B-6 meminfo B-5, B-6 reload B-1, B-2 reset B-6, B-10 ROM monitor B-1 to B-12 stack B-6 sysret...
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...3-3 rack-mounting 3-4 site requirements 2-3 tools required 2-6 wall-mounting 3-11, 3-13 interface numbering 1-9, 1-11 WAN interface cards 1-9 IOS software locating documentation xv recovering images B-8 ISDN BRI 2-12 to 2-13 L LAN connections 3-18 to 3-19 OL-2171-06 Index interface types 2-9 LEDs 100 Mbps... panel 1-3 to 1-4 interpretation of A-2 LINK, in 1-RU chassis 1-7 LINK, in Cisco 2691 1-8 Power, in 1-RU chassis 1-3 Power, in Cisco 2691 1-4 rear panel 1-5 to 1-8 RPS, in 1-RU chassis 1-4 SYS/RPS, in Cisco 2691 1-4 lightning safety 2-2 LINK LED 1-7 M meminfo command B-5, B-6 memory 1-2 to...
...3-3 rack-mounting 3-4 site requirements 2-3 tools required 2-6 wall-mounting 3-11, 3-13 interface numbering 1-9, 1-11 WAN interface cards 1-9 IOS software locating documentation xv recovering images B-8 ISDN BRI 2-12 to 2-13 L LAN connections 3-18 to 3-19 OL-2171-06 Index interface types 2-9 LEDs 100 Mbps... panel 1-3 to 1-4 interpretation of A-2 LINK, in 1-RU chassis 1-7 LINK, in Cisco 2691 1-8 Power, in 1-RU chassis 1-3 Power, in Cisco 2691 1-4 rear panel 1-5 to 1-8 RPS, in 1-RU chassis 1-4 SYS/RPS, in Cisco 2691 1-4 lightning safety 2-2 LINK LED 1-7 M meminfo command B-5, B-6 memory 1-2 to...