Cisco Cisco Email Security Appliance C190 Guía Del Usuario
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Cisco AsyncOS 8.0.2 for Email User Guide
Chapter 29 System Administration
Upgrading AsyncOS
Preparing to Upgrade AsyncOS
As a best practice, Cisco recommends preparing for an upgrade by taking the following steps.
Procedure
Step 1
Save the XML config file off-box.
Step 2
If you are using the Safelist/Blocklist feature, export the list off-box.
Step 3
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.
Step 4
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.
Note
Re-enable the listeners post-upgrade.
Upgrading AsyncOS from the GUI
Downloading and Installing the Upgrade
You can download and install in a single operation, or download in the background and install later.
Note
When downloading and upgrading AsyncOS in a single operation from a local server instead of from a
Cisco IronPort server, the upgrade installs immediately while downloading.
Cisco IronPort server, the upgrade installs immediately while downloading.
A banner displays for 10 seconds at the beginning of the upgrade process. While this banner is displayed,
you have the option to type Control-C to exit the upgrade process before downloading starts.
you have the option to type Control-C to exit the upgrade process before downloading starts.
Before You Begin
•
Choose whether you will download upgrades directly from Cisco or will host upgrade images from
a server on your network. Then set up your network to support the method you choose. Then
configure the appliance to obtain upgrades from your chosen source. See
a server on your network. Then set up your network to support the method you choose. Then
configure the appliance to obtain upgrades from your chosen source. See
and
.
•
If you will install the upgrade now, follow the instructions in
•
If you are installing the upgrade in a clustered system, see
•
If you will only download the upgrade, there are no prerequisites until you are ready to install it.
Procedure
Step 1
Choose System Administration > System Upgrade.
Step 2
Click Upgrade Options.