Prerequisites for Intercluster Deployment
You configure an intercluster peer between the IM and Presence database publisher nodes in standalone IM and Presence Service clusters. No configuration is required on the IM and Presence Service subscriber nodes in a cluster for intercluster peer connections. Before you configure IM and Presence Service intercluster peers in your network, note the following:
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The intercluster peers must each integrate with a different Cisco Unified Communications Manager cluster.
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You must complete the required multinode configuration in both the home IM and Presence Service cluster, and in the remote IM and Presence Service cluster:
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Configure the system topology and assign your users as required.
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Activate the services on each IM and Presence Service node in the cluster.
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You must turn on the AXL interface on all local IM and Presence nodes, and on all remote IM and Presence nodes. IM and Presence Service creates, by default, an intercluster application user with AXL permissions. To configure an intercluster peer, you will require the username and password for the intercluster application user on the remote IM and Presence Service node.
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You must turn on the Sync Agent on the local IM and Presence database publisher node, and on the remote IM and Presence database publisher node. Allow the Sync Agent to complete the user sychronization from Cisco Unified Communications Manager before you configure the intercluster peers.
For sizing and performance recommendations for intercluster deployments, including information on determining a presence user profile, see the IM and Presence Service SRND.