Filter
Top Products
684 Appendix A:Troubleshooting a WSS
NN47250-500 (320657-F Version 02.01)
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” (page 144).)
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
Clearing the port mirroring configuration
To clear the port mirroring configuration from a switch, use the following command:
clear port mirror
Note. Port mirroring enables you to snoop traffic on wired ports. To snoop wireless
traffic, see “Remotely monitoring traffic” (page 685).