I am way behind the times when it comes to layer three switching. I didn't have a problem doing inter-vlan routing but recently i was configuring a C4900M with a VLAN and noticed that the VLAN would not come up unless a device was connected the the applied ports of the VLAN. For example, if I made at:
(config)# Inter VLAN 400
until i applied it to a interface
(config-if)#switchport access vlan 400
and an active broadcasting device to the port, the VLAN is down hard.
Is this normal?
P.S. The C4900M is in transparent mode and the managment VLAN is the only VLAN being trunked to my 6509