Diagnosing backbone traffic/congestion on LAN

Unanswered Question
Apr 15th, 2009

Hi All,

If you were wating to see how much traffic/congestion was on your enterprise (L3) LAN backbone what are some good ways to do this. I know you can use the usual tools like wireshark, solarwinds, etc... Just curious as some methods used.



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Giuseppe Larosa Wed, 04/15/2009 - 04:58

Hello Brandon,

you can have nice graphs of MIB variables like ifinoctets ifoutctets drawn by MRTG with a reference line = link speed

it provides graphs in a daily, weekly, mounthly basis so it gives both a baseline and growth trends



So you can trace link usages on all devices and navigate on web pages

Hope to help


Giuseppe Larosa Wed, 04/15/2009 - 05:07

Hello Brandon,

I think they are similar

both use the

RRDTool's data storage and graphing functionality.

So by having a look at the graphs you could have a vision of link usage over time.

Probably you can also try to create events on devices that send traps when link usage is above a threshold.

This can be a different approach with devices playing an active role but requires additional configuration.

see for example EEM embedded event manager


Hope to help



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