I am going to upgrade my call manager from 220.127.116.1100-6 to 11.5(1)SU3a. I am downloading the latest iso file from cisco. The filename is UCSInstall_UCOS_18.104.22.16801-3.sgn.iso
Based on the release notes, it seems is a Standard upgrade and no COP file required.
I believe we can use the Unified Communications OS Administration to upgrade but is I am not confident on the actual steps. Can anyone guide me ?
Thanks in advance.
Solved! Go to Solution.
Yes, this is a minor upgrade no COP files required for this to work. Just simple OS admin procedure like installing firmware. Make sure if you have multiple CUCM server in cluster you follow below to minimize downtime.
1) Make sure at all time you have DRS backup.
2) Run the upgrade and dont do switch version, till the time all server are upgraded.
3) Always start with PUB and you can choose any order with SUB
4) Once all server are upgraded start doing switch-version from PUB first any order in SUB would be fine.
(Rate if it helps)