CSCvx97836-9200L reloading due to 'Power Failure or Unknown'

[sna-fpc]

ROM: IOS-XE ROMMON
BOOTLDR: System Bootstrap, Version 16.12.1r [FC2], RELEASE SOFTWARE (P)

uptime is 2 days, 14 hours, 8 minutes
Uptime for this control processor is 2 days, 14 hours, 12 minutes
System returned to ROM by Power Failure or Unknown at 09:02:02 UTC Wed Apr 29 2020
System restarted at 09:42:01 UTC Fri Nov 8 2024
System image file is "flash:packages.conf"
Last reload reason: Power Failure or Unknown

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
2 52 C9200L-48P-4X 16.9.4 CAT9K_LITE_IOSXE INSTALL
* 3 28 C9200L-24P-4X 16.9.4 CAT9K_LITE_IOSXE INSTALL
4 28 C9200L-24P-4X 16.9.4 CAT9K_LITE_IOSXE INSTALL

[Mark Elsen]

 - Ref : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx97836
   >...Workaround: RMA switch if issue occurs 2 or more times.

 M.

[sna-fpc]

It's a few times, but with a longer period of time. 2-3 times a year?

[balaji.bandi]

Try upgrade to latest code 17.9.5 or 17.12.4 (which ever is works for you.)

if you do not like to go higher version then  try 17.6.X

[sna-fpc]

Noted on 17.6.x and will do. Do we have a KB on firmware upgrading (best practice), and do we have the capability to revert the old firmware, if any?

[balaji.bandi]

All steps mentioned in the release notes.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9200/software/release/17-6/release_notes/ol-17-6-9200.html

high level -

1. take the config backup out of the box

2. give enough maintenance window, since Stack required to reload to take effective of new IOS XE Code

3. clean the Flash make sure have enough space.

4. check what mode of upgrade you looking bundle or install mode (prefered Install mode)