Cisco 3725 Software Configuration Guide - Page 188

Entering the ROM Monitor Mode Appendix C Using the ROM Monitor Following sample output shows a configuration that has been saved: Router# upgrade rom-monitor file tftp://223.255.254.254/ajayhn/C3745_RM2.srec Loading ajayhn/C3745_RM2.srec from 223.255.254.254 (via FastEthernet0/0 OK - 641719/1283072 bytes] This command will reload the router. Continue? [yes/no]: y Erasing boot flash eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee Programming boot flash pppp Now Reloading System Bootstrap, Version 12.2(4r)XT4, RELEASE SOFTWARE (fc1) TAC Support: http://www.cisco.com/tac Copyright (c) 2001 by cisco Systems, Inc. Running new upgrade for first time System Bootstrap, Version 12.2(8r)T1, RELEASE SOFTWARE (fc1) TAC Support: http://www.cisco.com/tac Copyright (c) 2002 by cisco Systems, Inc. c3745 processor with 196608 Kbytes of main memory Main memory is configured to 64 bit mode with parity disabled Upgrade ROMMON initialized rommon 1 > Note The rommon-pref command in the ROMMON command mode provides the same information as the upgrade rom-monitor preference command in the Cisco IOS Exec mod. Procedures for Recovering Boot and System Images If your 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: • xmodem-Use this if the computer attached to your console has a terminal emulator that has xmodem capability. • tftpdnld-Use this if you have a TFTP server directly connected to the Ethernet 0 port. Note The command tftpdnld is present in the Cisco 2600 series routers only. Using the xmodem Command The xmodem command establishes a connection between a console and the router console port for disaster recovery if both the boot and system images are erased from flash memory. xmodem [filename]-Establishes an xmodem connection between the console and the router. The optional parameter filename specifies the source file containing the Cisco IOS image. Other options include the following: • -c-Uses cyclic redundancy check (CRC-16) • -y-Uses Ymodem transfer protocol • -r-Copies the image to DRAM for launch • -x-Does not launch image on completion of download Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers C-8 OL-1957-04