Troubleshooting Tip: FortiLink internal echo reply timed out

Description

This article discusses the issue of intermittent FortiLink instability and the 'internal echo reply timed out' message on FortiSwitch devices. The user may experience this issue in a FortiLink environment using a dual-homed FortiSwitch access topology.

Scope

FortiGate, FortiSwitch.

Solution

To troubleshoot the 'internal echo reply timed out' message on FortiSwitch devices, follow these steps:

1. Run the command diagnose debug report on the affected FortiSwitch to gather detailed information about the issue.

2. Verify the trunk stability by running the command diagnose switch trunk summary on the FortiSwitch device.

3. Check the FortiLink interface status by running the command execute switch-controller get-conn-status on the FortiSwitch device.

4. If the issue persists, configure the static-isl option on the trunk by running the commands:
   
   

config switch trunk
 edit "_FlInK1_MLAG0_"
  set static-isl enable
 next
end

For 'edit "_FlInK1_MLAG0_"', notice this trunk name might change.

Monitor the system for new events after making the configuration change.

Note: The 'internal echo reply timed out' message has been identified as a false alarm and will be removed in future releases of FortiSwitch.