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Diagnosing backbone traffic/congestion on LAN

mbroberson1
Level 3
Level 3

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.

Thanks,

Brandon

3 Replies 3

Giuseppe Larosa
Hall of Fame
Hall of Fame

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

see

http://oss.oetiker.ch/mrtg/

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

Hope to help

Giuseppe

Hi Giuseppe,

Thanks for the info. Is this program similar or the same as "Cacti"? I have that in place.

http://www.cacti.net/

Thanks,

Brandon

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

http://www.cisco.com/en/US/docs/ios/netmgmt/configuration/guide/nm_eem_overview_ps6017_TSD_Products_Configuration_Guide_Chapter.html#wp1064328

Hope to help

Giuseppe

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