Руководство Пользователя для Cisco Cisco Email Security Appliance C170

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, IronPort 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 the listeners using the 

suspendlistener

 command when running the 

upgrade from the CLI. If you perform the upgrade from the GUI, listener 
suspension occurs automatically.

Drain the mail queue and the delivery queue.

Re-enable the listeners post-upgrade.

To upgrade AsyncOS after you have configured your update settings:

Click Available Upgrades on the System Administration > System Upgrade 
page. The Available Upgrades page is displayed.