Cisco Cisco Email Security Appliance X1050 Guía Para Resolver Problemas

Contributed by Stephan Fiebrandt and Khoa Nguyen, Cisco TAC
Engineers.
Dec 08, 2014

This document describes how to upgrade the Cisco Email Security Appliances (ESAs) that run in a cluster.

When ESAs run in a cluster, they must all use the exact same AsyncOS version and build. If you desire to
upgrade the ESAs, you must first disconnect the cluster. After all of the machines are upgraded, you can
reconnect the cluster via the clusterconfig command. 

Note: When the cluster is disconnected, it does not affect the mail flow; however, any changes that you make
while the cluster is disconnected are not propagated to the other systems until the reconnect is complete.

Note: You can perform the upgrade with the CLI or the GUI, but the reconnect clusterconfig commands are
only available via the CLI. This document describes how to upgrade the machines via the CLI.

Complete these steps in order to upgrade ESAs that run in a cluster via the CLI:

 Enter the upgrade command into the CLI in order to upgrade AsyncOS to a newer version. When
you are asked whether you wish to disconnect the cluster, respond with the letter Y in order to
proceed:

(Machine host1.example.com)> upgrade

You must disconnect all machines in the cluster in order to upgrade them. Do you wish

to disconnect all machines in the cluster now? [Y]> Y

1. 

Follow all of the upgrade prompts (reboot prompt included).

2. 

After all of the machines in the cluster are upgraded and rebooted, log onto a machine in the cluster
via the CLI and enter the clusterconfig command.

3.