Hi Arijit,
You should have console connection to the Supervisor to recover from Rommon mode. The possible reason could be,
- A switch reload or crash after the image was corrupted or deleted
- The Compact Flash which holds the system image has been removed
- The configuration register has been changed incorrectly. The configuration register value of 0x0 always brings the switch to ROMmon mode. The typical configuration register is 0x2102, with the boot system flash command pointing to the system image to load
Example:
Follow the instructions provided below:
- Issue the dev command to see which devices are available on your router:
rommon 1 > dev
Devices in device table:
id name
flash: flash
bootflash: boot flash
eprom: eprom
rommon 2 >
- Issue the dir flash: command, and then look for a valid Cisco IOS® software image:
rommon 3 > dir flash:
File size Checksum File name
8052512 bytes (0x7adf20) 0xc7b6 c4500-js-mz.121-6
rommon 4 >
- You can also use the dir bootflash:command to examine the bootflash for a valid boot image.
- Try to boot from that image. If the file is valid, this brings you back to normal operation mode:
rommon 5 > boot flash:c4500-js-mz.121-6
program load complete, entry point: 0x80008000, size: 0x7ade04
Self decompressing the image : #####################################
####################################################################
####...
Refer:
ROMmon Recovery for the Cisco 4500 and 4700 Series Routers
http://www.cisco.com/en/US/products/hw/routers/ps5199/products_tech_note09186a0080094012.shtml
Recover a Cisco IOS Catalyst 4500/4000 Series Switch from a Corrupt or Missing Image or in Rommon Mode
http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a0080094ecf.shtml
Regards,
Aru
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Regards,
Aru
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