I have a cisco 3950 L3 switch with BPDU guard enable on all ports , switch is configured with multiple VLAN's. One of the VLAN's "name vlan 50" needs to be extended. Because of BPDU guard as soon as i plug the L2 switch into L3 Switch it will disable the port with error "err-disable'. I would like to keep the BPDU guard enabled on all ports yet would like to connect the other switch to exisitng switch. I know that you could configure the switch so it wont send any BPDU packets out. How can i add the L2 switch to existing switch?