Follow these instructions to begin sniffing packets:
Wireless Labwhich we configured in Chapter 1, Wireless Lab Setup.
Wireshark&in the console. Once Wireshark is running, click on the Capture | Interfaces sub-menu:
mon0interface by clicking on the Start button to the right of the
mon0interface as shown in the preceding screenshot. Wireshark will begin the capture and now you should see packets within the Wireshark window: