That mean if i need to upgrade the OS on HA we going to have outage in your Scenario. So, If i need to upgrade the OS. I have to trigger fail over to pass the traffic through Passive Device. Then upgrade the Active one and trigger the failover to pass the traffic again to Primary Device. I think, the Ha should work if we don't have BIG major GAPS between PAN-OS version. I hope you correct me if i am wrong !
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