Is anyone aware of a suggested or recommended method for upgrading a pair of 515Es in a failover configuration?
In the light of http://www.cisco.com/warp/public/707/cisco-sa-20051114-ipsec.shtml it seems unlikely I'm the first person to want to do this but I can't see any reference to a procedure on the Cisco site.
Do I have to unplug the failover lead and do them one at a time? Can I just upgrade the primary, causing a failover to secondary, then upgrade the secondary causing a failover back to primary?
Any thoughts/links/experiences appreciated.