3com WX2200 3CRWX220095A User Manual

Port mirroring is a troubleshooting feature that copies (mirrors) traffic 
sent or received by a WX port (the source port) to another WX port (the 
observer). You can attach a protocol analyzer to the observer port to 
examine the source port’s traffic. Both traffic directions (send and receive) 
are mirrored.

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The switch can have one port mirroring pair (one source port and one 
observer port) at a time. 

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The source port can be a network port, MAP access port, or wired 
authentication port. 

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The observer port must be a network port, and cannot be a member 
of any VLAN or port group. 

To configure port mirroring, use the following command to specify the 
source and observer ports:

set port mirror source-port observer observer-port

For example, to set port 2 to monitor port 1’s traffic, use the following 
command:

WX1200# set port 1 observer 2

Attach a protocol analyzer to the observer port; in this example, port 2.

To display the port mirroring configuration on a switch, use the following 
command:

WX1200# display port mirror
Port 1 is mirrored to port 2

To clear the port mirroring configuration from a switch, use the following 
command:

clear port mirror