Upgrading LTM HA Pair - disable network failover?

I'm agreed with nitass re network failover protocols - even if the two versions use the same protocol / port i would play safe and not bank on them working together as you'd hope. Doesn't one of the referenced docs give this warning / advice? I think it does. Anyway, for a non-downtime scenario I used serial failover, rather than network failover. Then the Active would remain Active whilst you upgrade / reboot the Standby. It made my life a lot easier when I upgraded my HA environment. If I remember correctly I purchased one from f5 - and not expensive at all.

 

 

Re Redundancy State Preference - I'd always have this set as None. I inherited them configured with a preference but this only caused unnecessary failovers so changed it to None. For example, an Active reboots for some reason, Standby now becomes Active. However, once the original Active LTM is back online it then is made Active again. Just my two pence here.

 

 

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