Traffic Monitoring; Introduction; Feature Overview - Nokia ESB26 User Manual

8. Traffic Monitoring

Introduction

Traffic monitoring extends the monitoring capabilities of existing network analyzers in a
switched Ethernet environment. Traffic can be monitored on switch's ports and VLANs by
configuring 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 traffic
on the monitored ports and analyze the traffic on the network.

Feature Overview

A local monitor session is an association of a destination port with source ports and source
VLANs. You configure monitor sessions by using parameters that specify the source of
network 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 is
monitored by the port 1/1/13. A network analyzer on port 1/1/13 receives all network traffic
from 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 analyzer
on port 1/1/4 receives the outgoing network traffic on the VLANs.
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