I have a Dell PowerConnect 2824 managed switch and I'm trying to mirror one port to another port but both ports are part of a VLAN (my "Internal Network" VLAN).

TL;DR - I need help making sense of setting up a VLAN on this venerable switch, and then understanding how to set up the corresponding VLANs with the allegedly VLAN-aware Ubiquti APs (in my case, two ...