Cisco Cisco Email Security Appliance C170 사용자 가이드

CCS provides an enhancement where the administrator can open up cluster communication, but not CLI 
logins. By default, the service is disabled. If the centralized management feature is enabled on the 
appliance, then you will be prompted to enable CCS from the 

interfaceconfig

 command when you are 

prompted to enable other services. For example:

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. 

Do you want to enable SSH on this interface?  [Y]>

Which port do you want to use for SSH?

[22]>

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]>

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]>