The cluster system treats this existing node as obsolete and moves the user registrations gradually from the obsolete node to the other nodes.
The obsolete node keeps servicing an agent until the agent moves to any other node. The cluster system moves the user registration even if the user has a call on the obsolete node. However, the cluster system preserves all the calls on the obsolete node.
Note:
Avaya Hybrid Cloud Gateway cannot move the call state from the obsolete node to other nodes.