Forums > General Discussion > show ip int brief - possibly stupid question.
focker
1 post
23 Jan 2012 at 8:34 p.m. UTC

The output of show ip int brief includes status and protocol. My question is in regards to the status. What is the difference between "down" and "administratively down" I notice on a 4500 when a given interface does not have "shutdown" configured, the status will be "down" if no Ethernet cable is connected. But on a 3825 it will show as "up". I am a little confused.

joshlowe
95 posts
24 Jan 2012 at 7:28 p.m. UTC

down in the status column indicates the cable is down at the physical layer. This usually means it's unplugged or damaged, or disconnected at the other end. If it says administratively down it's because it has been shutdown in the configuration. Issue a no shutdown command in the interface configuration to bring it back up.

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