I upgraded a few pair of IPS/IDS devices last night and ran into an odd issue I haven't seen when upgrading other devices before. They run, typically, in Active/Passive mode, so when I upgrade I suspend one, upgrade, reboot, unsuspend it, and then repeat the process on the other device.
Last night after I walked through this process the devices came active and stayed active, despite them both being up. I have had to suspend one of these IPS/IDS devices in several locations to ensure only one is active.
Does anyone know why this happened and what the resolution may be?
Solved! Go to Solution.
Sounds like your devices went into split-brain and aren't able to see each others status, so they'll both actively be active assuming the other device is offline. I would look at you HA stats and ensure that the devices are properly communicating with eachother.
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