Cisco Cisco Email Security Appliance C160 Mode D'Emploi

command. You can have two separate clusters running while you upgrade 
machines to the same version. You can also upgrade clustered machines on the 
GUI Upgrades page.

If you use the upgrade command before disconnecting the individual machine 
from the cluster, AsyncOS disconnects all the machines in the cluster. IronPort 
Systems recommends that you disconnect each machine from the cluster before 
upgrading it. Then, other machines can continue working as a cluster until each is 
disconnected and upgraded.

To upgrade the machines in a cluster via the CLI:

On a machine in the cluster, use the 

disconnect

 operation of 

clusterconfig

. For 

example, to disconnect the machine 

losangeles.example.com

, type 

clusterconfig 

disconnect

 

losangeles

.example.com

. No 

commit

 is 

necessary.

Optionally, use the 

suspendlistener

 command to halt acceptance of new 

connections and messages during the upgrade process.

Issue the 

upgrade

 command to upgrade AsyncOS to a newer version.

Disregard any warnings or confirmation prompts about disconnecting all 
of the machines in the cluster. Because you have disconnected the 
machine, AsyncOS does not disconnect the other machines in the cluster 
at this point.

Select the version of AsyncOS for the machine. The machine will reboot after the 
upgrade is complete.

Use the 

resume

 command on the upgraded machine to begin accepting new 

messages.

Repeat steps 1 - 5 for each machine in the cluster.

After you disconnect a machine from the cluster, you cannot use it to 
change the  configurations of other machines. Although you can still 
modify the cluster configuration, do not change it while machines are 
disconnected because settings can become unsynchronized.