Lars Reimann wrote: > thx, but, i really do mean vlan ;) > > a layer 3 switch can support vlans based on subnet. > a layer 2 switch can only support port based or 802.1q based vlan > because it cannot look at ip-addresses. > > are port based vlan really based on osi-layer 1? I don't know the details of the OSI model, but port-based VLANs work simply because the equipment knows which port the VLAN comes in on and uses that information to know that the traffic belongs to a particular VLAN. Other types of VLANs just use different rules to determine which VLAN the traffic/packet belongs to. I actually am not sure it has much to do with OSI at all :) Ben -- Ben Greear <greearb@xxxxxxxxxxxxxxx> Candela Technologies Inc http://www.candelatech.com
