Cisco Cisco Expressway
Peer-Specific Items
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 N 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, Configuration primary, Cluster IP version, and TLS verification mode must be specified on each
peer and must be identical for all peers.
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.
The Time zone is specific to each peer. Each peer may have a different local time.
SNMP (System > SNMP)
SNMP settings are specific to each peer. They can be different for each peer.
Logging (Maintenance > Logging)
The Event Log and Configuration Log on each peer only report activity for that particular Expressway. The Log level
and the list of Remote syslog servers are specific to each peer. We recommend that you set up a remote syslog
server to which the logs of all peers can be sent. This allows you to have a global view of activity across all peers in
the cluster.
and the list of Remote syslog servers are specific to each peer. We recommend that you set up a remote syslog
server to which the logs of all peers can be sent. This allows you to have a global view of activity across all peers in
the cluster.
Security certificates (Maintenance > Security certificates)
The trusted CA certificate, server certificate and certificate revocation lists (CRLs) used by the Expressway must be
uploaded individually per peer.
uploaded individually per peer.
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Cisco Expressway Cluster Creation and Maintenance Deployment Guide
Peer-Specific Items