DTLS timer expired -

[krzysimirn]

This is my first post, hello everyone. I have a FortiGate 100E and two switches S148FP and S148FN. Fortilink hangs up very often and in logs I see Wait DTLS timer expired (Log Description CAPUTP session status notification) messages. Do you have any idea what's going on?

[FlavioB]

Hi.

Similar issue - solved by enabling ntpsync under "config system ntp". 

Let us know if that helped!

F.

[Rashers]

Same same but different.
I had the same error logs, FlavioB's comment led me to check the NTP server settings under System->Settings. The gate was not an NTP server on the Fortilink interface. once I added that, my switches came online.
Setup device as local NTP server

Listen on Interfaces : Fortilink Network Management