Cisco Cisco Email Security Appliance C170

9.7-2-054

10.0.0-124

10.0.0-125

If you upgrade to AsyncOS 10.0.0-203 from one of the above versions, you cannot revert to any of the 
previous versions.

AsyncOS 10.0 release is not a FIPS compliant release. If you have enabled FIPS mode on your appliance, 
you must disable it before upgrading to AsyncOS 10.0.

If a cluster includes C160, C360, C660, or X1060 hardware appliances, remove these appliances from 
the cluster before upgrading. 

All machines in a cluster must be running the same version of AsyncOS, and x60 hardware cannot be 
upgraded to this release. If necessary, create a separate cluster for your x60 appliances. 

If you are upgrading from a major (AsyncOS X.0) or minor (AsyncOS X.x) release other than the release 
immediately preceding this release, you should review the Release Notes for major and minor releases 
between your current release and this release. 

Maintenance releases (AsyncOS X.x.x) include only bug fixes. 

Cisco does not generally support the backward compatibility of configuration files with previous major 
releases. Minor release support is provided. Configuration files from previous versions may work with 
later releases; however, they may require modification to load. Check with Cisco Customer Support if 
you have any questions about configuration file support.

If you are upgrading your appliance using CLI, you may observe messages related to IPMI. You can 
ignore these messages. This is a known issue.

Defect ID: CSCuz28415

Review the 

If you are upgrading a virtual appliance, see