Bandwidth Issues

[Henry Martel]

I am relativity net to networking so I have some basic question. I was wondering if i can get some light shed on the following:

How can you determine who is a bandwidth hog on the network? and can you tell how much bandwidth was being used. I know there are tools out there that help with this, but i wanted to see what i can do from the cli when logging into a router.

Thanks

[Lei Tian]

Hi Henry,

You need to enable NetFlow or IP Accounting on the router, so it can gather the flow statistics.

HTH,
Lei Tian

Sent from Cisco Technical Support iPhone App

[mfurnival]

Hi Henry - Netflow is the tool that allows you to do this. You enable it on an interface and then export the information to a management platform (netflow collector) that charts top talkers / conversations etc.

http://en.wikipedia.org/wiki/NetFlow

Obviously you need the backend infrastrcture to collect this data. If you don't then your choices are more limited. NBAR can be enabled on a per interface basis too and that will give you some info.

Or if you have it to hand you can use an inline protocol analyser.

[Henry Martel]

Thanks for the replies. Netflow is definilty something I have to look into.

[Parvesh Paliwal]

http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfnfc.html

Hope it helps...here is the configuration manual..