MN700004 Rev 01 668. Traffic MonitoringIntroductionTraffic monitoring extends the monitoring capabilities of existing network analyzers in aswitched Ethernet environment. Traffic can be monitored on switch's ports and VLANs byconfiguring another port to "mirror" the traffic on the ports or VLANs you want to monitor.By attaching an analyzer to the mirror port, the system administrator can observe the trafficon the monitored ports and analyze the traffic on the network.Feature OverviewA local monitor session is an association of a destination port with source ports and sourceVLANs. You configure monitor sessions by using parameters that specify the source ofnetwork traffic to the monitor.For example, in Figure 8-1, all traffic on ports 1/1/1, 1/1/2, 1/1/3, 1/1/4, 1/1/10 and 1/1/12 ismonitored by the port 1/1/13. A network analyzer on port 1/1/13 receives all network trafficfrom these ports without being physically attached to port 1/1/13.Figure 8-2 shows an example of a monitor session. All traffic on VLAN 100 and VLAN 101(the source VLANs) is monitored by the port 1/1/4 (the destination port). A network analyzeron port 1/1/4 receives the outgoing network traffic on the VLANs.
