Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Call Manager Cluster Upgrade Procedure

Hi Guys,

Just a couple of questions about a CUCM Cluster Upgrade.

So I've got a 2 server cluster.  If I move all my devices off the PUB and onto the SUB, I upgrade the PUB first.

Once the PUB is upgraded, how do I get the devices to re-register from the SUB to the PUB if I wanted to simply test the PUB.  Because if I go onto the SUB after the PUB has been upgraded, I can't make any changes, so I can't change the server order of the device pool.

or is it a simple case of not being able to fully test until both have been upgraded?

I'd appreciate some advice,



VIP Super Bronze

Re: Call Manager Cluster Upgrade Procedure

Unplug the subscriber from the network; the phones will fallback to the secondary UCM node in their CM Group automatically.

New Member

Re: Call Manager Cluster Upgrade Procedure

thanks Jonathan, simple but effective.!!

**EDIT**  Actually - the reason I shy'd away from that was because I was hoping to be able to test a small device pool without everything moving over.

CreatePlease login to create content