Upgrade BIGIP LTM
I have two BIGIP LTM's that were a redundant pair until I upgraded the stanby unit to verion 10.2 from 9.3.
I had to change them both to single units because they will not work together with different versions.
The 9.3 unit is currently running our production web servers and I would like the make the new version my production unit. The problem is....when I shut the interfaces off on the 9.3 unit and bring them up on the 10.2 unit my network goes crazy and nothing will work. I had to turn the 9.3 unit back on and restart both of them to release all of the connections that were causing issues.
My question is.... would the maintenance mode option eliminate this issue? Or.. do I need to completely disconnect one of the units from the network, bring up the 10.2 unit, upgrade the 9.3 unit, and then bring it back online as the standby unit.????
Any suggestions would be appreciated.