Upgrading Ironport AsyncOS from version 8.5.6 to version 9

[jaksptr99]

Dear all,

I want to upgrade Ironport from version 8 to version 9. There are 4 virtual Email Security Appliances in a cluster.

The question is, can I just upgrade the Cisco Ironport from AsyncOS 8.5.6 directly to AsyncOS 9 or is there any pre-requisite(s)? Is there any configuration change? Should I exclude it first, etc?

I hope to get some advices.

Any kind of help will be appreciated.

Thank you very much.

jaksptr

[Robert Sherwin]

Depending on which version you are running, it should be one hop to get from 8.5.6 to 9.1.0.

See the following for quick reference on upgrading appliances in cluster:

http://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118266-technote-esa-00.html

Configuration will roll forward.  You should not have any issues w/ the upgrade.  

Be sure that you have applied the SSH keys patch for your virtual ESA.

-Robert