CUCM & Unity Upgrade - at same time ?

[PC PC]

Hi Guys, I was Wonder if it is possible to upgrade CUCM 8.6 and Unity 8.6 at same time ( To 9.1.2 ) ex : I Upgrade my CUCM PUB AND Unity PUB At SAME time. So both process the upgrade file at same time. Then, I Reboot CUCM PUB Only ( from what I saw, we have to reboot Unity once the cluster is update.. not the case for CUCM ) And again at same time : I Update CUCM SUB I Update Unity SUB

[Jaime Valencia · Accepted solution]

Yes, assuming you have redundancy, or don't care about service interruption if you don't have it, there's no problem.

[PC PC]

Can you confirm.... 

We will Update CUCM PUB,

Reload CUCM PUB

We will Update CUCM SUB

Reload CUCM SUB

We will Update Unity PUB

We will Update Unity SUB

Once both are update,

We reload PUB

Then

We reload SUB