I am trying determine the correct way to trunk between two TL-SG2428P switches within the OC200 interface, with multiple tagged VLANs.

I cannot seem to work out what defines a port as trunk vs access, aside from maybe an access port would only have one, untagged network?

When creating a port profile, I can add tagged networks, but the port requires a native & untagged network to be selected. 'None' is greyed out under 'native network'. The switches themselves have their management interfaces on the non-default VLAN.

Cheers