Recently during some prep work for a UCS firmware upgrade I noticed that there was a major alert showing for keyring certificate being invalid. At first I was a bit concerned but since it didn’t affect my login to UCS Manager I assumed it wasn’t too serious. After a bit of searching around the internet I found from Cisco’s site the CLI Configuration Guide for UCS (page 6) which shows the quick and easy fix to the problem.

Open an SSH session to the IP address/hostname of UCS Manager. It will connect to the primary Fabric Interconnect. Enter the commands in the order of steps below:

Step 1 UCS-A# scope security

Step 2 UCS-A /security # scope keyring default

Step 3 UCS-A /security/keyring # set regenerate yes

Step 4 UCS-A /security/keyring # commit-buffer

After the commit-buffer command has been issues all GUI sessions will be disconnected and you will need to log in again. When you log in next time you’ll be prompted to accept the new certificate. Once accepted UCSM will open and the alert will now be gone.

All fairly quick and painless!