Cisco Cisco Email Security Appliance C190 Guia Do Utilizador

Upgrading AsyncOS uses the following two step process:

Configure the upgrade settings. You can configure settings that affect how the 
Email Security appliance downloads the upgrade information. For example, you 
can choose where to download the upgrade images from and more. For more 
information, see 

Upgrade AsyncOS. After you configure the upgrade settings, upgrade the version 
of AsyncOS on the appliance. For more information see 

.

As a best practice, Cisco recommends preparing for an upgrade by taking the 
following steps:

Save the XML config file off-box.

If you are using the Safelist/Blocklist feature, export the list off-box.

Suspend all listeners. If you perform the upgrade from the CLI, use the 

suspendlistener

 command. If you perform the upgrade from the GUI, listener 

suspension occurs automatically.

Wait for the queue to empty. You can use the 

workqueue

 command to view the 

number of messages in the work queue or the 

rate

 command in the CLI to monitor 

the message throughput on your appliance.

Re-enable the listeners post-upgrade.

To upgrade AsyncOS after you have configured your update settings: