Trunk Port Not Working on FortiSwitch 7.0.1 Even With Correct Configuration

[Spade28]

Hi, has anyone here experienced an issue where the trunk port on a FortiSwitch running firmware version 7.0.1 does not work even though the configuration appears to be correct?

We already verified the following

1. VLANs are properly created and tagged

2. Trunk mode is configured correctly on both ends (FortiSwitch and upstream device)

3. Interface members are assigned to the trunk as expected

However, the traffic still doesn’t pass through the trunk link. The same configuration works fine when tested on a higher firmware version (e.g., 7.2.4), but it fails on version 7.0.1.

If anyone has encountered this before or knows a workaround, insights would be greatly appreciated.