Aaron Walrath - Another IT Guy's Meanderings

Recently I had the desire to start monitoring the statistics of our internet router.  The main thing that I wanted to measure was the volume of traffic passing in from and out to the internet because the ISP limits the amount of data passing over the connection for each month.   With a tool such as Cacti we can collect these statistics via SNMP and graph them in a fairly simple way.  For details on how to set up an instance of Cacti on a CentOS Linux server go here.

Configure SNMP on Cisco Router

Go into global config mode:

cisco1# conf t

First we’ll set up read only access for a community string named “TestCommunity”.  The community string functions like a password and only allows access for management stations configured with the same string name.  Bear in mind that this value is passed over the network unsecured so do…

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