Cisco Cisco Expressway Maintenance Manual
Clustering and Peers
This section describes how to set up a cluster of Expressway peers. Clustering is used to increase the capacity of
your Expressway deployment and to provide resiliency.
your Expressway deployment and to provide resiliency.
About Clusters
An Expressway can be part of a cluster of up to six Expressways. Each Expressway in the cluster is a peer of every
other Expressway in the cluster. When creating a cluster, you define a cluster name and nominate one peer as the
primary from which all relevant configuration is replicated to the other peers in the cluster. Clusters are used to:
other Expressway in the cluster. When creating a cluster, you define a cluster name and nominate one peer as the
primary from which all relevant configuration is replicated to the other peers in the cluster. Clusters are used to:
■
Increase the capacity of your Expressway deployment compared with a single Expressway.
■
Provide redundancy in the rare case that an Expressway becomes inaccessible (for example, due to a network
or power outage) or while it is in
or power outage) or while it is in
(for example, during a software upgrade).
Peers share information with each other about their use of bandwidth, registrations, and user accounts. This allows
the cluster to act as one large Expressway Local Zone as shown in the example below.
the cluster to act as one large Expressway Local Zone as shown in the example below.
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