Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The default port number for CCS is 2222. You may change this to another open, 
unused, port number if you prefer. After the join is complete and the joining 
machine has all the configuration data from the cluster, the following question is 
presented:

When centralized management is enabled, the machines that are “cluster aware” 
will continually verify network connections to other machines within the cluster. 
This verification is done by periodic “pings” sent to other machines in the cluster.

If all attempts to communicate with a particular machine fail, then the machine 
that has been trying to communicate will log a message saying that the remote 
host has disconnected. The system will send an alert to the administrator that the 
remote host went down.

Even if a machine is down, the verification pings will continue to be sent. When 
a machine rejoins the cluster network, a synchronization command will be issued 
so that any previously offline machines can download any updates. The 
synchronization command will also determine if there have been any changes on 
one side but not the other. If so, then the previously down machine will silently 
download the updates. 

A machine may be disconnected from a cluster. Occasionally, you may intend to 
deliberately disconnect the machine, for example, because you are upgrading the 
machine. A disconnect could also occur by accident, for example, due to a power 
failure or other software or hardware error. A machine that is disconnected from 

Do you want to enable Cluster Communication Service on this 

interface? [N]> y

Which port do you want to use for Cluster Communication Service?

[2222]>