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Catalyst 3750 Switch Software Configuration Guide
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Chapter 39 Troubleshooting
Recovering from Corrupted Software By Using the Xmodem Protocol
Recovering from Corrupted Software By Using the Xmodem
Protocol
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 you are using.
This recovery procedure requires that you have physical access to the switch.
Step 1 From your PC, download the software image tar file (image_filename.tar) from 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 Cisco.com, refer to the release notes.
Step 2 Extract the bin file from the tar file.
• If you are using Windows, use a zip program that is capable of reading a tar file. Use the zip program
to navigate to and extract the bin file.
• If you are using UNIX, follow these steps:
1. Display the contents of the tar file by using the tar -tvf <image_filename.tar> UNIX command.
switch% tar -tvf
image_filename.tar
drwxr-xr-x 9658/25 0 Apr 21 13:20 2003 c3750-i5-mz.121.11-AX/
drwxr-xr-x 9658/25 0 Apr 18 18:31 2003 c3750-i5-mz.121.11-AX/html/
-rw-r--r-- 9658/25 4005 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/homepage.htm
-rw-r--r-- 9658/25 1392 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/not_supported.html
-rw-r--r-- 9658/25 9448 Apr 18 15:56 2003 c3750-i5-mz.121.11-AX/html/common.js
-rw-r--r-- 9658/25 22152 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/cms_splash.gif
-rw-r--r-- 9658/25 1211 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/cms_13.html
-rw-r--r-- 9658/25 2823 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/cluster.html
-rw-r--r-- 9658/25 4195 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/Redirect.jar
-rw-r--r-- 9658/25 14984 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/mono_disc.sgz
-rw-r--r-- 9658/25 1329516 Apr 18 15:56 2003 c3750-i5-mz.121.11-AX/html/CMS.sgz
-rw-r--r-- 9658/25 140105 Apr 18 15:56 2003 c3750-i5-mz.121.11-AX/html/images.sgz
-rw-r--r-- 9658/25 213848 Apr 18 15:56 2003 c3750-i5-mz.121.11-AX/html/help.sgz
-rw-r--r-- 9658/25 135599 Apr 18 15:56 2003
c3750-i5-mz.121.11-AX/html/CiscoChartPanel.sgz
-rwxr-xr-x 9658/25 58860 Apr 18 18:31 2003
c3750-i5-mz.121.11-AX/html/cms_boot.jar
-rw-r--r-- 9658/25 3970586 Apr 21 12:00 2003
c3750-i5-mz.121.11-AX/c3750-i5-mz.121.11-AX.bin
-rw-r--r-- 9658/25 391 Apr 21 13:20 2003 c3750-i5-mz.121.11-AX/info
-rw-r--r-- 9658/25 98 Apr 18 16:46 2003 info
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