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A Cisco router is stuck in ROMmon mode

Core Issue

These are three ways the router can enter ROM Monitor (ROMmon) mode (rommon#>):

  • Reload, initialize, or power cycle the router with the configuration register boot field set to 0
  • Reload, initialize, or power cycle the router without having a Cisco IOS  Software image to boot from
  • Press the Break key within the first 60 seconds of the system boot. The break function is enabled during this period

Resolution

For more information on resolving this issue, refer to the Look for a Valid Image in Flash: section of ROMmon Recovery Procedure for the Cisco 7200, 7300, 7400, 7500, RSP7000, Catalyst 5500 RSM, uBR7100, uBR7200, uBR10000, and 12000 Series Routers.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 03:35 PM
Updated by:
 
Everyone's tags (3)
Comments
New Member

Hi, my router is a 2600 and is stuck in a rommon mode. The command "dir flash" shows me this:

rommon 13 > dir flash:
File size           Checksum   File name
21562452 bytes (0×1490454)  0×17fa    c2691-advsecurityk9-mz.124-23.bin (deleted)
rommon14>

When  i try to install the new IOs, these are the steps and the result:

Readonly ROMMON initialized
rommon 1 > IP_ADDRESS=192.168.1.1
rommon 2 > IP_SUBNET_MASK=255.255.255.0
rommon 3 > DEFAULT_GATEWAY=192.168.1.1
rommon 4 > TFTP_SERVER=192.168.1.32
rommon 5 > TFTP_FILE=c2691-advsecurityk9-mz.124-23.bin
rommon 6 > set
PS1=rommon ! >
BOOT=
?=0
BSI=0
RANDOM_NUM=955026305
ROM_PERSISTENT_UTC=1014951492
RET_2_RTS=
RET_2_RCALTS=
IP_ADDRESS=192.168.1.1
IP_SUBNET_MASK=255.255.255.0
DEFAULT_GATEWAY=192.168.1.1
TFTP_SERVER=192.168.1.32
TFTP_FILE=c2691-advsecurityk9-mz.124-23.bin
rommon 7 > dnld
~timed out waiting for data – aborting
!rommon 8 >

Someone can help me. I need to load the new IOS or boot the computer with the current

New Member
if I try to add via xmodem IOS this is what happens:

rommon 1 > xmodem -c c2691-advsecurityk9-mz.124-23.bin
Do not start the sending program yet...
         File size           Checksum   File name
  21562452 bytes (0x1490454)  0x17fa    c2691-advsecurityk9-mz.124-23.bin (deleted)

WARNING: All existing data in flash will be lost!
Invoke this application only for disaster recovery.
Do you wish to continue? y/n  [n]:  y
Ready to receive file c2691-advsecurityk9-mz.124-23.bin ...
CCCCCCCCCC
Timeout waiting for data - aborting download...
rommon 2 >

what kind of cable do I need? I'm using a straight connected to f0 / 0?

Thanks

New Member

Hi,

Please check your TFTP server . it might not be started. it shall be started and copy the new IOS to the tftp folder. and do tftpdnld on the router (like above). i had an same issue and i fixed the problem.

Shajil