I am a bit of a newby to this and I have just ran into a somewhat of a curious question and a bit odd. I do apologize if this is very simple question and I am just not as sharp as I should be.
So on a switch, on a enabled fast Ethernet interface if I do a status, sh interface command, if the cable is unplugged, it shows down/down, as expected. plug it back in and I have up/up.
On the router, same thing fast ethernet interface, enabled, cabled plugged in shows up/up, cable unplugged it shows up/down, not down/down as I expected to see.
To throw the monkey wrench in the picture, I do the same thing on the serial port on the router, if I unplug the cable it goes down/down, up/down or up/up when plugged in.
Is this the right behavior or no? Am I missing something? Why different statuses on the same situation plugged/unplugged between it being a router vs a switch?
I get the same behavior on a 3700 and a 2600 router, switches are a 2950, I believe the IOSs are 12.3