Recovering From Corrupted Software - Cisco Catalyst 2950 Software Manual

Recovery Procedures
Continue with the configuration dialog? [yes/no]: N
At the switch prompt, change to privileged EXEC mode:
Step 11
switch> enable
Rename the configuration file to its original name:
Step 12
switch# rename flash:config.text.old flash:config.text
Copy the configuration file into memory:
Step 13
switch# copy flash:config.text system:running-config
Source filename [config.text]?
Destination filename [running-config]?
Press Return in response to the confirmation prompts.
The configuration file is now reloaded, and you can use the following normal commands to change the
password.
Enter global configuration mode:
Step 14
switch# config terminal
Step 15 Change the password:
switch(config)# enable secret <password>
or
switch(config)# enable password <password>
Step 16 Return to privileged EXEC mode:
switch(config)# exit
switch#
Write the running configuration to the startup configuration file:
Step 17
switch# copy running-config startup-config
The new password is now included in the startup configuration.

Recovering from Corrupted Software

Switch software can be corrupted during an upgrade, by downloading the wrong file to the switch, and
by deleting the image file. In all these cases, the switch does not pass the power-on self-test (POST), and
there is no connectivity.
The procedure uses the XMODEM Protocol to recover from a corrupt or wrong image file. There are
many software packages that support the XMODEM protocol, and this procedure is largely dependent
on the emulation software that you are using.
Connect a PC with terminal-emulation software supporting the XMODEM Protocol to the switch
Step 1
console port.
Set the line speed on the emulation software to 9600 baud.
Step 2
Disconnect the switch power cord.
Step 3
Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 14 Troubleshooting
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