Cisco Cisco Email Security Appliance C170 ユーザーガイド
33-25
Cisco AsyncOS 9.0 for Email User Guide
Chapter 33 System Administration
Upgrading AsyncOS
On clustered machines, actions apply only to the machine to which you are logged in.
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 configuration file off-box. If you need to revert to the pre-upgrade release for any reason,
you will need this file.
you will need this file.
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.
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.
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.
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.
To
Do This
View more information about the latest upgrade
Hover over the upgrade notification.
View a list of all available upgrades
Click the down arrow in the notification.
Dismiss a current notification.
The appliance will not display another notification
until a new upgrade becomes available.
until a new upgrade becomes available.
Click the down arrow, then select Clear the
notification, then click Close.
notification, then click Close.
Prevent future notifications (Users with
Administrator privileges only.)
Administrator privileges only.)
Go to System Administration > System
Upgrade.
Upgrade.