Cisco IM&Presence 11.5.1 cluster - reinstall nodes

[marco_81]

Hi all,

my deployment is made of:

- Cisco CUCM 11.5.1 cluster, one Publisher and one Subscriber (it's a working cluster serving device phones).

- Cisco IM&Presence 11.5.1 cluster, one Publisher and one Subscriber (it's not serving any client, and a fresh installation is preferred).

IM&Presence nodes were added in Cisco Unified CM Administration > System > Server as per installation guide.

I have been asked to remove (delete) the Cisco IM&Presence 11.5.1 cluster (Pub+Sub) and install again, because of database replication unrecoverable errors.

I followed some guides, and the procedure should be this:

- To reinstall an IM and Presence Service database publisher node:

1) Power down the IM and Presence Service subscriber node

2) Delete the subscriber node as follows:

1. Unassign all users that are assigned to each of the IM and Presence Service subscriber nodes. (Select Cisco Unified CM Administration > User Management > Assign Presence Users).

2. Remove the subscriber nodes from their presence redundancy groups. (Select Cisco Unified CM Administration > System > Presence Redundancy Groups).

3. Delete the subscriber nodes from the Unified Communications Manager server list. (Select Cisco Unified CM Administration > System > Server

3) Power down the IM and Presence Service database publisher node. 

4) Delete the IM and Presence Service database publisher node as follows:

1. Unassign the users that are assigned to the IM and Presence Service database publisher node. (Select Cisco Unified CM Administration > User Management > Assign Presence Users).

2. Remove the node from the presence redundancy group. (Select Cisco Unified CM Administration > System > Presence Redundancy Groups).

3. Delete the IM and Presence Service database publisher node from the Unified Communications Manager server list. (Select Cisco Unified CM Administration > System > Server).

5) Readd the IM and Presence Service database publisher node to the Unified Communications Manager server list.

• Perform a fresh install of the IM and Presence Service database publisher node.
• Readd the IM and Presence Service subscriber nodes to the Unified Communications Manager server list.
• Perform a fresh install of each subscriber node

- To reinstall an IM and Presence Service subscriber node:

1. Power down the IM and Presence Service node.
2. Delete the subscriber node as follows:

   1. Unassign the users that are assigned to the node. (Select Cisco Unified CM Administration > User Management > Assign Presence Users).

   2. Remove the node from the presence redundancy group. (Select Cisco Unified CM Administration > System > Presence Redundancy Groups).

   3. Delete the node from the Unified Communications Manager server list. (Select Cisco Unified CM Administration > System > Server)

3. Readd the IM and Presence Service node to the Unified Communications Manager server list.
4. Perform a fresh install of the node.

I took these steps from IM&P 12.5 guide, is this the same for 11.5.1?

Do i need to reboot CUCM Publisher (in maintanance window) after deleting IM&P nodes from Cisco Unified CM Administration > System > Server?

Do i need to open a TAC to remove IM&P nodes from CUCM and perform a fresh installation of IM&P cluster?

Please help.