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identify bandwidth hog

Posted on 2009-05-14
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Last Modified: 2013-12-01
Hello Experts,

I am looking for a way to identify which computer(s) is saturating our T1. Yesterday, on more than one occasion, we experienced complete saturation resulting in short periods of downtime.

The network is comprised of:

Cisco 1841 Router
Juniper NetScreen-25
Cisco Catalyst 2960
2 Wireless Access Points
and various (roughly 60) wireless and wired computers/servers (running XP, 2003, and Mac OS X)

I'm looking for a way to monitor and discover which computer is using all of the bandwidth (preferably open source, but commercial is not a problem). Any advice regarding tools/nex steps would be greatly appreciated.

Thanks much!
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Question by:Daniel_Schafer
6 Comments
 
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Expert Comment

by:Qlemo
ID: 24387168
NetScreen allows with a hidden command to create a short-term profile. You need several steps to accomplish that, I will elaborate on it if you like.
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Assisted Solution

by:chryzophylax
chryzophylax earned 150 total points
ID: 24388589
Depending on the IOS on the router and how your network is connected to your router, you can also use NetFlow on the router to show top-talkers. Check out example-config here:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1838/products_feature_guide09186a0080259533.html#wp1131648
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Author Comment

by:Daniel_Schafer
ID: 24389022
Thanks for the quick responses! I'll look into them both shortly.
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Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

 
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Expert Comment

by:Sanga Collins
ID: 24391712
@Qlemo

could you talk about your technique? my network is exclusively juniper devices and this would be useful info to know
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Accepted Solution

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Qlemo earned 350 total points
ID: 24395142
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Expert Comment

by:Qlemo
ID: 24452779
Daniel_Schafer,
would you mind voting in my article?
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