Zero downtime IOS upgrade on ASA5520

[pgera2010]

Hi,

We are planning to upgrade IOS on a 5520 pair, from 7.2.4 to 8.2.4, and cause minimum outage.

And according to the documentation, we can do the zero downtime IOS upgrade by failing over to the standby ASA and back.

http://www.cisco.com/en/US/docs/security/asa/asa80/configuration/guide/mswlicfg.html#wp1053398

So, can during this process, can we go from 7.2.5 to 8.0.5 (last maintenance release), or do we have to move to 8.0.2 first ?

Thanks!

[varrao · Accepted solution]

Hi,

Yes, you can dfefinitely go from 7.2.5 to 8.0.5 it won't cause any issue. qand yes for zero downtime, you need to follow the doc.

Thanks,

Varun

[pgera2010]

That worked, Thanks Varun!