Trunk link with LuCI on WRT3200ACM

Thank you, I also bookmarked the original post from rmilecki.

It's still not clear to me:

  1. What does it mean to have port 4 tagged on vlan1? What if it will receive a packet for tag 123?
  2. Will I have to add a record in that form for each vlan tag I should add from the switch, or the router will pass them automatically?
  3. Why is it in the same VLAN with the other ports?
  4. Untagged in vlan2 means that if I attached a "stupid" pc to port4 it will work as if it was a normal unmanaged switch? Otherwise the pc wouldn't be able to connect, am I right?

Sorry for the stream of dumb questions; I really appreciate your effort!