I have two pairs of PA-3220s in active-standby mode that have been in use for a little more than two years. They are all running 8.1.13-h3, located in the same rack, and the HSCI ports are interconnected with SR-SPF+ mods and 50 micron multimode fiber. As recent as a few weeks ago, one pair began flapping on the HSCI port. No changes were made at the time we noticed the port flapping. One thing that I can see from the CLI is the active firewall has no link on the HSCI port, and the standby does. We replaced the optics and fiber to no avail. We already have a TAC case open but they don't have any fixes. I know that someone already mentioned that rebooting didn't help. Does anyone have any other ideas? Is anyone on the PANOS 9.1 track and still experiencing these issues?
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