Adding a new subscriber in CUCM 9.1.2 cluster cause all device reset

[manoj.k.chokkakula]

I am on CUCM version 9.1.2 ,whenever i add the subscriber /upgrade the subscriber to Cluster  ,all the registered devices drops .

Not sure why ,In Cisco Documentation ,it never stated this bug in 9.1.2 service release notes.

However , In 9.1.1 mentioned about this in important notes. 

CSCub12922: Adding a new subscriber causes device reset
After you install a new node in an existing cluster, all phones that are registered to the cluster are reset.

Anyone experienced ? or aware about this bug?

Is this the case going forward in any version after 8.X? for subscriber addition to cluster will reset the devices?

Thanks

Manoj

[Manish Gogna]

Hi Manoj,

As per the following bug

https://tools.cisco.com/bugsearch/bug/CSCub12922/?reffering_site=dumpcr

Symptom:
Add new subscriber to existing 8.x CUCM cluster cause all device reset

Conditions:

Adding a new subscriber to existing 8.x CUCM cluster cause all device reset due to database update. Issue recreated in lab when "Prepare Cluster for Rollback to pre 8.0" set to both true & false. The symptom and logs are the same in each scenario
This is not a bug. The condition is applicable only to CUCM 8.6 and higher releases. Whenever a node is added to CUCM cluster , from CUCM 8.6 onwards , the phones belonging to that Call Manager group will be automatically restarted

Workaround:
None

So, this applies to all 8.6+ releases of cucm.

HTH

Manish

[manoj.k.chokkakula]

Thanks Manish ,this bug was updated by cisco TAC after we reported the issue.