Cisco Cisco Email Security Appliance C170 사용자 가이드

Issue the 

upgrade

 command to show a list of available upgrades. Select the desired upgrade from the list 

to install it. You may be asked to confirm messages or read and agree to license agreements, etc. You can 
choose whether or not to save the current configuration to the 

configuration

 directory. If so, you can 

choose whether or not to mask the passwords in the configuration file. You can also choose to email a 
copy of the configuration files.

You cannot load a configuration file with masked passwords using the 

loadconfig

 command.

When upgrading, do not pause for long amounts of time at the various prompts. If the TCP session should 
happen to time out during the download, your upgrade may fail.

Please note these differences when upgrading AsyncOS from a local server as opposed to the traditional 
method: 

The upgrading 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 can configure how the Email Security appliance downloads AsyncOS upgrades. Cisco IronPort 
provides two methods (or “sources”) for upgrading: streaming upgrades and remote upgrades.

With streaming upgrades, your Cisco IronPort appliances download the AsyncOS upgrades directly from 
the Cisco IronPort update servers. Each Cisco IronPort appliance downloads the upgrade separately. For 
more information, see 

For remote upgrades, your Cisco IronPort appliances download the AsyncOS upgrades from a server 
within your network. You only download the upgrade image from Cisco IronPort one time, and then 
serve it to your Cisco IronPort appliances. For more information, see 

.

Use the Security Services > Service Updates page to switch between the two upgrading methods 
(streaming is the default), as well as configure the interface to use to download the upgrade and proxy 
server settings. For more information, see 

Optionally, use the 

updateconfig

 command in the CLI.