Chapter 47 Troubleshooting; Recovering From A Software Failure - Cisco Catalyst 3120 Software Manual

Recovering from a Software Failure

Recovering from a Software Failure
Switch software can be corrupted during an upgrade, by downloading the wrong file to the switch, and
by deleting the image file. In all of these cases, the switch does not pass the power-on self-test (POST),
and there is no connectivity.
This 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.
This recovery procedure requires that you have physical access to the switch.
From your PC, download the software image tar file (image_filename.tar) from www.hp.com/support
Step 1
and Cisco.com.
The Cisco IOS image is stored as a bin file in a directory in the tar file. For information about locating
the software image files on www.hp.com/support and Cisco.com, see the release notes.
Extract the bin file from the tar file.
Step 2
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Step 3 Connect your PC with terminal-emulation software supporting the Xmodem Protocol to the switch
console port.
Set the line speed on the emulation software to 9600 baud.
Step 4
Step 5 Power off the switch by using one of these methods:
•
•
•
Press the Mode button, and at the same time, power on the switch by using one of these methods:
Step 6
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If you are using Windows, use a zip program that can read a tar file. Use the zip program to navigate
to and extract the bin file.
If you are using UNIX, follow these steps:
Display the contents of the tar file by using the tar -tvf image_filename.tar UNIX command.
1.
switch% tar -tvf image_filename.tar
Locate the bin file, and extract it by using the tar -xvf image_filename.tar image_filename.bin
2.
UNIX command.
switch% tar -xvf image_filename.tar image_filename.bin
x cbs31x0-universal-mz.122-40.EX/cbs31x0-universal-mz.122-40.EX.bin, 3970586
bytes, 7756 tape blocks
Verify that the bin file was extracted by using the ls -l image_filename.bin UNIX command.
3.
switch% ls -l image_filename.bin
-rw-r--r-- 1 boba
cbs31x0-universal-mz.122-40.EX/cbs31x0-universal-mz.122-40.EX.bin
Power off the standalone switch or the entire switch stack.
Power off the standalone switch or the switch stack by using the Onboard Administrator GUI.
Remove the switch or stack members from the enclosure.
If you powered off the standalone switch or switch stack, it should automatically power on. If this
does not occur, use the Onboard Administrator GUI to power on the switch or stack.
If you powered off the switch by using the Onboard Administrator GUI, use the GUI to power on
the switch or stack.
If you powered off the switch by removing the switch or stack members from the enclosure, re-insert
the standalone switch or the stack members in the enclosure.
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Chapter 47 Troubleshooting
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