Cisco Cisco Email Security Appliance C650 Guía Del Usuario
40-2
User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 40 Centralized Management Using Clusters
Cluster Requirements
Cluster Requirements
•
Machines in a cluster must have resolvable hostnames in DNS. Alternatively, you can use IP
addresses instead, but you may not mix the two.
addresses instead, but you may not mix the two.
. Cluster communication is normally initiated using
the DNS hostnames of the machines.
•
A cluster must consist entirely of machines running the same version of AsyncOS.
See
for how to upgrade members of a cluster.
•
Machines can either join the cluster via SSH (typically on port 22) or via the Cluster Communication
Service (CCS).
Service (CCS).
See
•
Once machines have joined the cluster, they can communicate via SSH or via Cluster
Communication Service. The port used in configurable. SSH is typically enabled on port 22, and by
default CCS is on port 2222, but you can configure either of these services on a different port.
Communication Service. The port used in configurable. SSH is typically enabled on port 22, and by
default CCS is on port 2222, but you can configure either of these services on a different port.
In addition to the normal firewall ports that must be opened for the appliance, clustered machines
communicating via CCS must be able to connect with each other via the CCS port. See
communicating via CCS must be able to connect with each other via the CCS port. See
.
•
You must use the Command Line Interface (CLI) command
clusterconfig
to create, join, or
configure clusters of machines.
Once you have created a cluster, you can manage non-cluster configuration settings from either the
GUI or the CLI.
GUI or the CLI.
See
and
Cluster Organization
Within a cluster, configuration information is divided into 3 groupings or levels. The top level describes
cluster settings; the middle level describes group settings; and the lowest level describes
machine-specific settings.
cluster settings; the middle level describes group settings; and the lowest level describes
machine-specific settings.