Cisco Cisco Email Security Appliance C170

You can upgrade to release 8.5.6-074 from the following versions: 

7.6.3-019 

8.0.1-023 

8.0.1-111 

8.5.6-063

8.5.6-073

To ensure a successful upgrade, you must complete some steps before you start the upgrade process. For 
details on these prerequisites, see 

.

Read through and consider the installation and upgrade impacts listed in this section. 

When you upgrade AsyncOS for Email from the web interface or Command Line Interface (CLI), the 
configuration is saved to file in the /configuration/upgrade directory. You can access the upgrade 
directory using an FTP client. Each configuration file name is appended with the version number, and 
passwords in the configuration file are masked so they are not human readable.

You must be logged in as the admin to upgrade. Also, you must reboot the appliance after upgrading.

If you are deploying a virtual appliance, see the Cisco Content Security Virtual Appliance Installation 
Guide. 

If you are switching from a physical appliance to a virtual appliance, you will need to convert your 
configuration file to an AsyncOS 8.0 virtual appliance configuration file. For information, see the 
Release Notes for Configuration Migration Tool 1.0 for Cisco Content Security Virtual Appliances. You 
can import the AsyncOS 8.0 virtual appliance configuration file into a virtual appliance running 
AsyncOS 8.5. 

Loading configuration 
in clustered appliances

You can now load configuration in clustered appliances in the following 
scenarios:

If you are migrating from on-premise environment to hosted environment 
and you want to migrate the on-premise cluster configuration to the 
hosted environment.

If an appliance in a cluster is down or needs to be retired and you want 
to load the configuration from this appliance to a new appliance that you 
plan to add to the cluster.

If you want to load a backed up configuration to a cluster.

See also 

.