Cisco Cisco Expressway Maintenance Manual
To change the master peer you must log in to every other Expressway in the cluster and change the configuration
master on each peer:
master on each peer:
1.
Log in to the Expressway and go to System > Clustering.
2.
Change the Configuration master to the peer you want to set as the new master (the numbers match against
the Peer IP address fields underneath).
the Peer IP address fields underneath).
3.
Click Save.
4.
Repeat this for every peer in the cluster, ensuring that you select the same new master on each peer.
Note that during this process you may see alarms raised on some peers about inconsistent master peer configuration.
These alarms will be lowered when every peer in the cluster is configured with the new master.
These alarms will be lowered when every peer in the cluster is configured with the new master.
Monitoring the Status of the Cluster
The status sections at the bottom of the Clustering page show you the current status of the cluster, and the time of
the previous and next synchronization.
the previous and next synchronization.
Peer-Specific Items in Clustered Systems
Most items of configuration are applied via the primary peer to all peers in a cluster. However, the following items
(marked with a
(marked with a
†
on the web interface) must be specified separately on each cluster peer.
Note:
You should not modify configuration data that applies to all peers on any peer other than the primary peer. At
best it will result in the changes being overwritten from the primary; at worst it will cause cluster replication to fail.
Cluster configuration (System > Clustering)
The list of Peer IP addresses (including the peer's own IP address) that make up the cluster has to be specified on
each peer and they must be identical on each peer.
each peer and they must be identical on each peer.
The Cluster name and Cluster pre-shared key have to be specified on each peer and must be identical for all peers.
Ethernet speed (System > Network interfaces > Ethernet)
The Ethernet speed is specific to each peer. Each peer may have slightly different requirements for the connection to
their Ethernet switch.
their Ethernet switch.
IP configuration (System > Network interfaces > IP)
LAN configuration is specific to each peer.
■
Each peer must have a different IPv4 address and a different IPv6 address.
■
IP gateway configuration is peer-specific. Each peer can use a different gateway.
Note that the IP protocol is applied to all peers, because each peer must support the same protocols.
IP static routes (System > Network interfaces > Static routes)
Any static routes you add are peer-specific and you may create different routes on different peers if required. If you
want all peers in the cluster to be able to use the same static route, you must create the route on each peer.
want all peers in the cluster to be able to use the same static route, you must create the route on each peer.
System name (System > Administration)
The System name must be different for each peer in the cluster.
DNS servers and DNS host name (System > DNS)
DNS servers are specific to each peer. Each peer can use a different set of DNS servers.
The System host name and Domain name are specific to each peer.
NTP servers and time zone (System > Time)
The NTP servers are specific to each peer. Each peer may use one or more different NTP servers.
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Cisco Expressway Administrator Guide