Gigabit Ethernet Switch Management Guide

W EB I NTERFACE
3-50
Using a Port Mirror for Analysis
You can mirror traffic from any source port to a target port for
real-time analysis. You
can then attach a network sniffer or RMON
probe to the target port and study the traffic
crossing the source port
in a completely unobtrusive manner. When mirroring port
traffic,
note that the target port must be configured in the same VLAN and be
operating
at the same duplex mode as the source port (see VLAN
Static List on page 3-38).
You can use the port mirror configuration screen to designate a single
port pair for mirroring as shown below:
Parameter Description
Status Enables/disables port mirroring.
Mirror Source
Port
The port whose traffic will be monitored.
Mirror Target Port The port that will duplicate or “mirror” all the traffic
happening on the monitored port.