Troubleshooting high utilisation on E1 link 1

[ABOzIT]

Hello!

We are experiencing high utilisation on our E1 link from our Cisco 2821 router.

I'm trying to identify a souce of the excess traffic but not entirely sure how to do it. Ideally I would like to pinpoint it down to a particular client IP address.

Can anyone assist with some "Show" or "debug" commands to help me out here please.

Thanks!

 

[lerdalt]

easiest might be to enable top talkers on the router...then you can look at snapshots when utilization is high:
ip flow top-talkers
sort-by bytes
top 10

otherwise check into enabling netflow on the router...will show all the conversations not just the top 10 like I gave in the example above.