782 Appendix A:Troubleshooting a WSS
NN47250-500 (Version 03.01)
Host HW Address VLAN Type State
------------------------------ ----------------- ----- ------- --------
10.8.1.1 00:30:b6:3e:5c:a8 1 DYNAMIC RESOLVED
10.8.107.1 00:0b:0e:00:04:0c 1 LOCAL RESOLVED
(For more information about ARP, see “Managing the ARP table” on page 186.)

Port mirroring

Port mirroring is a troubleshooting feature that copies (mirrors) traffic sent or received by a WSS port (the source port)
to another WSS 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.

Configuration requirements

The switch can have one port mirroring pair (one source port and one observer port) at a time.
The source port can be a network port, AP access port, or wired authentication port.
The observer port must be a network port, and cannot be a member of any VLAN or port group.

Configuring port mirroring

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:
WSS# set port 1 observer 2
Attach a protocol analyzer to the observer port; in this example, port 2.

Displaying the port mirroring configuration

To display the port mirroring configuration on a switch, use the following command:
WSS# show port mirror
Port 1 is mirrored to port 2
Note. Port mirroring enables you to snoop traffic on wired ports. To snoop wireless
traffic, see “Remotely monitoring traffic” on page 783.