Cisco Cisco Expressway
Adding an Expressway to an existing cluster
Follow this process if you have an existing X8.5 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 X8.5 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.
Prerequisites
All Expressways to be included in the cluster must be running the same version (X8.5) 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 > Ethernet
).
l
Valid IP address and IP gateway (
System > 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
).
Note that the number of call license keys may be different on different peers; all other license keys
must be identical on each peer.
must be identical on each peer.
l
At least one valid DNS server configured, and that if unqualified DNS names are used elsewhere (e.g.
for the NTP server), that the correct Domain name is also configured (Domain name is added as a
suffix to an unqualified DNS name to make it into an FQDN) (
for the NTP server), that the correct Domain name is also configured (Domain name is added as a
suffix to an unqualified DNS name to make it into an FQDN) (
System > DNS
).
l
A valid and working NTP server configured (
System > Time
; in the Status section, the State should
be “
Synchronized
”).
l
No peers configured (
System > Clustering
– all Peer x IP address fields on this page should be blank.
If not, delete any entries and click Save).
Go to
Status > Alarms
. If there is an alarm that the Expressway must be restarted, go to
Maintenance >
Restart options
and then click Restart.
Cisco Expressway Cluster Creation and Maintenance Deployment Guide (X8.5)
Page 12 of 38
Adding an Expressway to an existing cluster