I have been trying to resolve an instability issue with our Fortiswitch stack with support. They have been unable to conclusively fix the issue, however through a process of elimination we have been able regain some stability in the stack.
Now we seem to have two members in the stack that seem to drop off randomly either together or individually, this is happening 3-4 times a day. This results in all devices connected to the switch dropping their connections and dropping 5 to 15 packets. I have jumped onto one of switches and this is what is in the log when it drops:
Those NTP messages are known issues. The FortiSwitches are pre-programmed to try and go to public NTP servers to get time, but only as a backup. They actually get time syncs from the gate. This post is three years old so I reckon you already figure that out.
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