On a 2950, if I look at the output of show interface for a switchport with nothing connected to it, the result is:
FastEthernet0/1 is down, line protocol is down (notconnect)
As you might expect.
Why is it, if I look at the status of an L2 switchport on a 6500, the interface is up/down when nothing is connected to it?
FastEthernet3/1 is up, line protocol is down (notconnect)