Upgrade to IOS 15.1.1-SY on VSS (Supervisor Engine 720)?

[Kris Pellens]

Dear all,

There are major issues found in IOS version 15.1.1-SY running on a VSS (Supervisor Engine 720).

Two weeks ago we tried to upgrade two VSS clusters; both upgrades failed!

Cisco TAC opened two new bugs:

1. CSCud96150: VRF vpn-num misprogrammed causes connectivity issues.
   Severity: catastrophic.
   
2. CSCue06000: boot device statements are lost after VSS reload.
   Severity: moderate.
   

Advice: do not upgrade to version 15.1.1-SY! Wait for the next release.

Somebody else found major issues during the upgrade to 15.1.1-SY?

Many thanks.

Regards,

Kris

[Leo Laohoo · Accepted solution]

Thanks for the update Kris.