This article has been superseded by Introduction In order to understand how and why 802.11 (WiFi) devices behave as they do, it is invaluable to perform a wireless packet capture ('sniffer'.) This can be especially important when working with Cisco TAC to resolve a technical problem. The following articles will help you to choose and use a wireless sniffer.
Download CommView for WiFi. CommView for WiFi is a tool for monitoring wireless. Commview For Wifi N Wireless Lan Card Free Broadcom n Wireless. CommView for WiFi is a powerful wireless network monitor and analyzer for 802.11 a/b/g/n/ac networks. Loaded with many user-friendly features, CommView for WiFi combines performance and flexibility with an ease of use unmatched in the industry.
Additionally, there are several commercially available wireless sniffer products:. OmniPeek from WildPackets.
AirMagnet WiFi Analyzer from Fluke. CommView for WiFi from TamoSoft. AirPcap from Riverbed (formerly CACE) When providing Cisco TAC with wireless packet captures, please supply them in a format that is readable by current Wireshark, and that includes 802.11 meta data (RSSI, channel, data rate) - such as OmniPeek (Airopeek) or Netmon 2.0 format.