You read the wrong how-to's. :D Imagine VLANs as separate networks: two (or N) routers connected to two (or N) switches connected to devices. Design the topology and select unique network IP ranges...

See those posts for an explanation (or read the manual): http://forum.tp-link.com/showthread.php?105474-EAP-Controller-Software-User-Management-wrong

What makes you think that this message: vasil wrote "unrecognized public network" has anything to do with this: The old wa270g get 30kbps on a vdsl that gets 45mbps. and - again - how did you measure...

I don't speak for TP-Link, but you can take it as: "has been verified, tested and found to fully work by me". :)

kellanist wrote This is how everything is tagged currently and the PVID for all 5 ports is set to VLAN 1: This is the cause that it does not work. Port 1 needs to have PVID 2 (WAN), ports 2 (trunk)...

You are welcome. BTW, my T1500-10PS arrived today, it's the direct successor of TL-SG2210P. Like all other models of the former TL-SG2xxx series it's a smart switch with lot of useful features. I...