Neighboring Between Expressway Clusters
You can neighbor your local Expressway cluster to a remote cluster. The remote cluster might be a neighbor, traversal client, or traversal server to the local system. When a call is received on the local Expressway and is passed via the relevant zone to the remote cluster, it gets routed to whichever peer in that neighbor cluster has the lowest resource usage (peers in maintenance mode are not considered). That peer then forwards the call to one of the following:
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A locally registered endpoint, if the endpoint is registered to that peer
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A peer, if the endpoint is registered to another peer in the cluster
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An external zone, if the endpoint is located elsewhere
Configuration instructions are provided in the Expressway Administrator Guide.