I wouldn't be worried about the dev/md3 partition being at 92%, that wouldn't cause your HA issues at all. If you are utilizing the dedicated HA1 and HA2 ports and not configuring another interface as a high-availability interface, high dataplane utilization shouldn't cause the HA interfaces to drop out. I would open a ticket with TAC so they can look at the associated logs and see exactly what was going on at the time the interfaces dropped.
I'm seeing the same issue here. We have an active/passive 5250 cluster.
We are running PANOS8.1.9
All HA links are directly connected.
cluster node 1:
cluster node 2:
Is this a known issue?
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