I am analyzing a 802.11n network with various tools using AirPcap Nx cards. In all cases i am seeing 4 extra bytes between LLC-Snap and IEEE-802.11 headers. Most of the tools are failing to recognize traffic properly. wireshark and com-view recognize these 4 extra bytes as LLC header but you can see the Snap header in raw view.
Is there any proper header that can be expected in that place. I was not able to find any thing in the web.
The network is running fine.