Cisco Cisco Email Security Appliance C650 Guía Del Usuario
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Cisco AsyncOS 9.0 for Email User Guide
Chapter 33 System Administration
Reverting to a Previous Version of AsyncOS
Related Topics
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Reverting to a Previous Version of AsyncOS
AsyncOS includes the ability to revert the AsyncOS operating system to a previous qualified build for
emergency uses.
emergency uses.
Reversion Impact
Using the
revert
command on a appliance is a very destructive action. This command destroys all
configuration logs and databases. Only the network information for the management interface is
preserved--all other network configuration is deleted. In addition, reversion disrupts mail handling until
the appliance is reconfigured. Because this command destroys network configuration, you may need
physical local access to the appliance when you want to issue the
preserved--all other network configuration is deleted. In addition, reversion disrupts mail handling until
the appliance is reconfigured. Because this command destroys network configuration, you may need
physical local access to the appliance when you want to issue the
revert
command.
Caution
You must have a configuration file for the version you wish to revert to. Configuration files are not
backwards-compatible.
backwards-compatible.
Reverting AsyncOS on Virtual Appliances May Impact the License
If you revert from AsyncOS 9.0 for Email to AsyncOS 8.5 for Email, the license does not change.
If you revert from AsyncOS 9.0 for Email to AsyncOS 8.0 for Email, there is no longer a 180-day grace
period during which the appliance delivers mail without security features.
period during which the appliance delivers mail without security features.
Feature key expiration dates do not change in either case.
Related Topics
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Reverting AsyncOS
Procedure
Step 1
Ensure that you have the configuration file for the version you wish to revert to. Configuration files are
not backwards-compatible. To do this, you can email the file to yourself or FTP the file. A simple way
to do this is to run the
not backwards-compatible. To do this, you can email the file to yourself or FTP the file. A simple way
to do this is to run the
mailconfig
CLI command.
Step 2
Save a backup copy of the current configuration of your appliance (with passwords unmasked) on
another machine.
another machine.
Note
This is not the configuration file you will load after reverting.
Step 3
If you use the Safelist/Blocklist feature, export the Safelist/Blocklist database to another machine.
Step 4
Wait for the mail queue to empty.