How to do a software rollback for 3850 stacked switch. ?

[praveenrk1989]

Im planning to do a ios upgrade for 3850 stacked switch .i need to submit a backout plan for this . can someone help with that. 

[Julio E. Moisa]

Hi,

These steps can be useful:

1- Request and get an approval for the maintenance window

2- Get a backup of your configuration

3- Upload the new IOS on the switch, via USB or TFTP/FTP

4- No boot system flash:oldimage.bin (check were the image is stored and the file name through show version)

5- boot system flash:newimage.bin 

6- write

7- reload

8- Compare/Verify the configuration. 

The step 4 & 5 could be different for this model. The boot system is configurable through the configure terminal. Now you must check where the new and current images are stored.

These links can be useful: 

Upgrade a stacked switch: http://thesystemexpert.com/2015/11/03/how-to-upgrade-software-on-a-cisco-3850-switches-in-a-switching-stack/

http://www.techexams.net/forums/ccnp/110144-cisco-3850-switch-ios-upgrade.html

http://wannabelab.blogspot.com/2017/04/cisco-3850-switch-ios-upgrade-via.html

Recovery

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117552-technote-cat3850-00.html 

Hope it is useful. 

[deshtikypshaq]

Hi

1. copy from tftp server to flash.

2. next command: boot system flash:// (here write your new image).

3. if something wrong: just rewrite - boot system (to old image).