Cisco Cisco Expressway
Introduction
Cisco Expressway (Expressway) clusters are designed to extend the resilience and capacity of an
Expressway installation. Expressway peers in a cluster share bandwidth usage as well as routing, zone and
other configuration among themselves.
Expressway installation. Expressway peers in a cluster share bandwidth usage as well as routing, zone and
other configuration among themselves.
Call licensing is carried out on a per-cluster basis. Any call licenses that have been installed on a cluster peer
are available for use by any peer within the cluster. If a cluster peer becomes unavailable, the call licenses
installed on that peer will remain available to the rest of the cluster peers for two weeks from the time the
cluster lost contact with the peer. This will maintain the overall license capacity of the cluster — however,
note that each peer is limited by its physical capacity.
are available for use by any peer within the cluster. If a cluster peer becomes unavailable, the call licenses
installed on that peer will remain available to the rest of the cluster peers for two weeks from the time the
cluster lost contact with the peer. This will maintain the overall license capacity of the cluster — however,
note that each peer is limited by its physical capacity.
Every Expressway peer in the cluster must have the same routing capabilities — if any Expressway can
route a call to a destination it is assumed that all Expressway peers in that cluster can route a call to that
destination. If the routing is different on different Expressway peers, then separate Expressways /
Expressway clusters must be used.
route a call to a destination it is assumed that all Expressway peers in that cluster can route a call to that
destination. If the routing is different on different Expressway peers, then separate Expressways /
Expressway clusters must be used.
This guide describes how to create and maintain Expressway clusters. It provides information on:
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Cisco Expressway Cluster Creation and Maintenance Deployment Guide (X8.6)
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Introduction