Oops. Hit "Reply" instead of "Reply All." >Well vlan 1 by default carries all of the spannin tree messages and things >like that. Its basically the >equivalent of 224.0.0.5 in OSPF. Its how the switches communicate. Hopefully >what I've said helps and someone >else please correct me if I'm wrong but this is how I understand spanning-tree
Spanning tree BPDUs are actually layer 2, not layer 3. They are sent to the L2 multicast address 01:80:C2:00:00:00. I believe that VLAN1 just carries all traffic by default unless that traffic is tagged for another VLAN (even supposing the native VLAN on, say f0/2 was VLAN3, if traffic were to enter f0/2, it would be tagged as VLAN3 as it left f0/2 then dealt with as necessary). I'm sure that the BPDU information is correct, and I _think_ the VLAN info is as well, but I'm certainly open to correction if necessary. --jdguffey _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
