Troubleshooting Tip: SD-WAN performance SLA status showing '?'

[akushwaha]

Description	This article describes an issue where the SD-WAN Performance SLA status shows a '?' instead of UP or DOWN.
Scope	FortiGate.
Solution	The screenshot below shows that Performance SLA status displays a '?': Collect the link monitor debug: diagnose debug application link-monitor -1 diagnose debug enable Refer to the example output showing only necessary log details: lnkmtd::ping_socket_set(115): <----- Failure to connect the ping socket for the monitor To disable debug: diagnose debug disable This issue can be fixed by restarting the 'lnkmtd' process. To restart the process, use the methods below: Find the process ID (PID) with the following command:    diagnose sys process pidof lnkmtd Once PID is identified, restart the process with below command: diagnose sys kill 11 <pid> If multiple processes are there, then the above command needs to be repeated for every PID. To kill all the PIDs of the lnkmtd process at once, the following command can be executed:  fnsysctl killall lnkmtd  Once this is done, the performance SLA will display the right status as shown below: