Recovering an IOS using TFTP and Xmodem
Have you lost or corrupted an IOS? These procedures descibe:
- How to recover an IOS from rommon using TFTP
- How to recover an IOS from switch: prompt using Xmodem
This is the minimum configuration to recover via TFTP:
rommon 1 > IP_ADDRESS=192.168.1.100
rommon 2 > IP_SUBNET_MASK=255.255.255.0
rommon 3 > DEFAULT_GATEWAY=192.168.1.1
rommon 4 > TFTP_SERVER=192.168.1.50
rommon 5 > TFTP_FILE=c2600-adventerprisek9-mz.124-5a.bin
rommon 6 > tftpdnld (this command kicks off the tftp download)
If you are at the “switch:” prompt and therefore are unable to recover an IOS using TFTP, use this procedure to recover via Xmodem:
switch: dir flash:
Directory of flash:/2 -rwx 2344 <date> config.text
3 -rwx 24 <date> private-config.text
5 -rwx 40 <date> env_vars
6 -rwx 0 <date> system_env_vars15994368 bytes available (4608 bytes used)
switch:copy xmodem: flash:c3550-ipservicesk9-mz.122-25.SEE.bin
Begin the Xmodem or Xmodem-1K transfer now…
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