Procedures For Recovering Boot And System Images; Using The Xmodem Command - Cisco 2620 Configuration Manual

Entering the ROM Monitor Mode
Following sample output shows a configuration that has been saved:
Router# upgrade rom-monitor file
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:
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:
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:
•
•
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:
•
•
•
•
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
C-8
http://www.cisco.com/tac
http://www.cisco.com/tac
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.
-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
tftp://223.255.254.254/ajayhn/C3745_RM2.srec
Appendix C Using the ROM Monitor
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