Rolling back switch software
If you are downgrading to a software version that supports long user names and passwords, ignore the prerequisite. Software versions K.15.01.0032 and later support the longer user names and passwords
Prerequisite
Before downgrading to a software version that does not support long user names and passwords from a software version that supports them, complete one of the following tasks.
Using the password CLI command or the Web browser interface, change usernames or passwords to be no more than 16 characters in length, and without any special characters. Then execute a CLI write memory command (required if the include-credentials feature has ever been enabled).
Clear the values using the no password all CLI command. Then execute a CLI write memory command (required if the include-credentials feature has ever been enabled).
Clear password values by using the "Clear" button on the switch. Then execute a CLI write memory command (required if the include-credentials feature has ever been enabled).
Rolling back switch software
To roll back your switch from K.15.01.0031 to K.14.47, for example, follow the steps below:
Verify that your images and configuration are set correctly using the show version, show flash and show config files commands.
Switch1# show version Image stamp: /sw/code/build/btm(t5a) Apr 23 2010 05:43:42 K.15.01.0031 67 Boot Image: Primary Switch1# show flash Image Size(Bytes) Date Version ------ ----------- ------- ------- Primary Image : 11537788 04/23/10 K.15.01.0031 Secondary Image : 9839140 11/06/09 K.14.47 Boot Rom Version: K.15.09 Default Boot : Primary Switch1# show config files Configuration files: id | act pri sec | name ---+-------------+----------------------------- 1 | * * | config1 2 | * | config2 3 | |Boot the switch using the secondary image (with config2).
Switch1# boot system flash secondary System will be rebooted from secondary image. Do you want to continue [y/n]? y
Enter ‘y’ for yes, and the switch will boot from the secondary image (K.14.47, in this example) with the corresponding configuration for that software version (Config2).