Routerboard 850Gx2 radio tap header

Dear all,

Got some strange Wireshark packet originating from a R850Gx2 running v6.35 stable. My Wifi router is a run off the mill Netgear R7000. Does anyone know why I’m seeing this packet? It’s a router after all and has nothing to do with a WiFi-signal.

For those who would like to reproduce: I got this using a Macbook Pro notebook using Wireshark. I don’t think any Windows gear can add the radio tap packet because of a driver limitation. It’s the analyzing software who adds this packet to the best of my knowledge, not the network adapter.

ps: I had to zip the pcap file as otherwise I could not upload the attachment. One peculiar detail is that it has an invalid FCS.
radiotap.zip (497 Bytes)

Were you connected to the wifi network from the Macbook? Could be a capture bug where a packet got captured from the wrong interface.

Yes I was, but I am supposed to in order to sniff this traffic.