How To: Configure the Switch and MRTG to Graph Traffic Rates for Each VLAN via SNMP

This How To Note describes an example of how to monitor the throughput for each VLAN on the switch, on a per-port basis. To do this, we use QoS to split the traffic from each VLAN into separate QoS traffic classes, and then we configure MRTG (Multi Router Traffic Grapher) to query the QoS traffic class counters MIB via SNMP. MRTG can then use the results obtained to create graphical representations of the traffic throughput over different periods of time.