Interface Up/Down Times 2801

[nbowles]

I'm trying to determine if an interface went down and for how long. I have used the 'show logging history' command and did see that the interface came up, but I can't seem to find out when it went down. Is there a command I can run from the CLI that will show me this kind of information?

Cisco Newbie

 

[vlf]

If it rebooted, you won't be able to find this out from the log, as the log is cleared on loss of power. Try using sh log (w/o the history at the end.) If it appears that the message has aged out, set your buffers larger:
(config)#logging buff 4096 (or higher). Also, check to see what level you're logging to the buffers. Set it to informational: (config)#logging buff info.

See if that helps.