I'm stumped about getting this to work so I hope someone can lend a hand. I don't even know how to begin explaining but I'll try. I have read the VLAN articles but I still can't figure this out. My switch, a Cisco SLM2008, has become unreachable. No ping, no webinterface. Its management "interface" is in VLAN 1. The setting that caused this is, is called "acceptable frame type". I set this to "tagged only". Two other strange options I have left unchecked: Enable Tx Force Untag (was unchecked by default) Enable Ingress Filter (was checked by default) My network layout: Switch port 1 (VLAN 1, VLAN2) ------- > Draytek router port 3 (VLAN 1) Draytek router port 2 (VLAN 1) ------> regular "dumb" switch port 1 My desktop is conntected to the "dumb" switch. So, I'm thinking the switch rejects my traffic because the traffic comming from my desktop is untagged. However, port 2 of the Draytek is in VLAN 1. Sinde my desktop is conntected to a switch which is conntected to port 2, I would have thought the Draytek would tag the frame? Anyway, I'm just speculating and help is more than welcome!