Trunk Port Not Working on FortiSwitch 7.0.1 Even With Correct Configuration

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Hi,

If the trunk port is not working on FortiSwitch 7.0.1 despite having the correct configuration, follow these troubleshooting steps:

1. Verify LLDP Profile:

   • Ensure that the LLDP profile mapped to the ports is set to default-auto-isl.
   • Use the command:

     FSW# show switch physical-port <port_name> 

2. Check Auto-ISL Setting:

   • Confirm that auto-isl is enabled under the switch global settings.
   • Use the command:

     sh full-configuration switch global 

3. Enable Auto-Network:

   • Ensure that auto-network is enabled with the management VLAN set to 4094.
   • Use the command:

     FSW# config switch auto-network set mgmt-vlan 4094 set status enable end 

4. Check Trunk Configuration:

   • Verify the trunk configuration using:

     show switch trunk 

5. Inspect Physical Connections:

   • Ensure that the physical connections between the switches are secure and correct.

6. Review Logs and Debug:

   • Check the logs for any error messages or warnings.
   • Use debugging commands to gather more information.

If the issue persists after these steps, consider consulting Fortinet support for further assistance.