iRule after upgrading 9.1.X to 9.3.x

I usually do the same concerning upgrade processes (upgrade standby and failover to it). My upgrades, however, have never been split across major versions. I imagine you will be fine to do this with stateless traffic as the boxes should function fine as an HA pair layer3 and down on different versions. My concern would be whether a 9.3 and a 9.1 pair would exchange state and persistence information correctly, and whether or not a config sync would work.

 

 

Perhaps some of the consultants have a better answer here?