Cisco Catalyst 9300 ISSU Support

[zachartl]

Hello,

Does the 9300 Switch support ISSU Upgrades in a stack configuration? We're predominately at IOS XE Version 17.03.05

Thank you,

Terry

[balaji.bandi]

Traditional Stack does not support ISSU upgrade as per i know. Only ISSU supported for STACKWISE VIRTUAL

been hearing buzz word but never got any success myself testing eFSU - for quick reload to minimize the downtime.

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9300-series-switches/216837-extended-fast-software-upgrade-on-cataly.html

[zachartl]

Good to know, the traditional switch reload to effect upgrade is still the way it seems. Thank you for your time and response.

[balaji.bandi]

yes there is no other method so far discovered.

[Leo Laohoo]

At 17.3.5, 9300 can support xFSU.

I strongly recommend anyone planning to use FSU/eFSU/xFSU make sure to have a proactive TAC Case in case something goes wrong.  

After all, we call FSU as "f*ck sh* up".

[zachartl]

I will heed your advice and opt to go traditional switch reload to effect the switch upgrade. Thank you for taking the time to provide that timely response. 

[Leo Laohoo · Accepted solution]

Please see attachment.

[zachartl]

Very informative procedure. Thank you greatly!