Cisco Cisco Expressway
Adding an Expressway to an existing cluster
Follow this process if you have an existing X8.6 cluster (of one or more peers) to which you want to add
another Expressway peer. If you do not have an existing cluster, following the instructions in the section
another Expressway peer. If you do not have an existing cluster, following the instructions in the section
This process will add an X8.6 Expressway to the cluster and replicate the cluster master’s configuration onto
that Expressway. Note that:
that Expressway. Note that:
n
You can have up to 6 Expressways, including the master Expressway, in a cluster.
n
Only one Expressway must be added to the cluster at a time.
You should only make configuration changes on the master Expressway.
CAUTION:
Do not adjust any cluster-wide configuration until the cluster is stable with all peers running.
Cluster database replication will be negatively impacted if any peers are upgrading, restarting, or out of
service when you change the cluster's configuration.
service when you change the cluster's configuration.
Any changes made on other peers are not reflected across the cluster, and will be overwritten the next time
the master’s configuration is replicated across the peers. The only exceptions to this are some
the master’s configuration is replicated across the peers. The only exceptions to this are some
.
You may need to wait up to one minute before changes are updated across all peers in the cluster.
Prerequisites
All Expressways to be included in the cluster must be running the same version (X8.6) of Expressway
software.
software.
Add the new peer
On the master Expressway:
Ensure that the master Expressway does not list this new Expressway peer in any of its neighbor zones or
traversal zones (
traversal zones (
Configuration > Zones > Zones
).
Note: The Master Expressway will be the source of the configuration for this new Expressway peer and all
other Expressway peers in the cluster. When an Expressway is added to the cluster, its configuration will be
deleted and replaced by that from the Master.
other Expressway peers in the cluster. When an Expressway is added to the cluster, its configuration will be
deleted and replaced by that from the Master.
On the Expressway to be added to the cluster:
1. Check that no other Expressway (anywhere in the organization) has this Expressway’s IP address in its
clustering peers list.
2. Backup the Expressway (
Maintenance > Backup and restore
).
3. Using the web interface, review the configuration to ensure that the Expressway has:
l
A valid Ethernet speed (
System > Network interfaces > Ethernet
).
l
Valid IP address and IP gateway (
System > Network interfaces > IP
).
l
The same set of option keys installed as those that will be installed on all other peers of the cluster
(
(
Maintenance > Option keys
).
Cisco Expressway Cluster Creation and Maintenance Deployment Guide (X8.6)
Page 12 of 40
Adding an Expressway to an existing cluster