interface uptime

[verilet]

hi i have a cisco 3640 router, and last night my network monitor program send me emails saying that the ping service to servers in a remote location where unreachable. So what i want to check, is when was the last time my interface went down. i know i can check the router uptime with sh ver, but is there a way to do it just for a specific interface? or is there another way i can troubleshoot my problem? my remote servers didn't go down but rather i think the t1 went down or somehting.

thanks,

[Georg Pauwen]

Hello,

if you turn on logging on the router you should be able to see the times the interface went down. Just make sure that you configure the datetime/uptime for the logging, the whole thing would look like this:

Router(config)#logging buffered

Router(config)#service timestamps log datetime msec localtime --> this shows you the logging entries based on the time the router shows with the ´show clock´ command

or

Router(config)#service timestamps log uptime msec localtime --> this shows you the logging entries based on the uptime of the router

When you issue the ´show log´ command, you should see entries telling you when the interface went down.

Since you are saying that you are using a network monitoring program: you can also have the interface send SNMP traps when the interface goes down/up.

In interface configuration mode, type ´snmp traps link-status´.

HTH,

Georg