Cisco Cisco Expressway Maintenance Manual
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. See the
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. See the
section for further details.
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.
Administration access (System > Administration)
The following system administration access settings are specific to each peer:
■
Serial port / console
■
SSH service
■
Web interface (over HTTPS)
■
Redirect HTTP requests to HTTPS
■
Automated protection service
Option keys (Maintenance > Option keys)
Option keys are specific to each peer. Each peer must have an identical set of option keys installed, but you must
purchase these separately for each peer in the cluster. However, this does not apply to rich media session and TURN
relay licenses; these licenses can be installed on any cluster peer and are available for use by any peer in the cluster.
purchase these separately for each peer in the cluster. However, this does not apply to rich media session and TURN
relay licenses; these licenses can be installed on any cluster peer and are available for use by any peer in the cluster.
Sharing Bandwidth Across Peers
When clustering has been configured, all peers share the bandwidth available to the cluster.
Cluster Upgrades, Backup and Restore
Upgrading a cluster
.
Backing up a cluster
The backup process saves all configuration information for the cluster, regardless of the Expressway used to make
the backup.
the backup.
Restoring a cluster
You cannot restore data to an Expressway that is a part of a cluster.
To restore previously backed up cluster configuration data you must follow this process:
1.
Remove the Expressway peer from the cluster so that it becomes a standalone Expressway.
2.
Restore the configuration data to the standalone Expressway.
3.
Build a new cluster using the Expressway that now has the restored data.
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Cisco Expressway Administrator Guide