Hi, according to wireshark (radiotap.mcs.bw field) some MPDUs in an A-MPDU are recieved at 40Mhz while others are reiceved at 20Mhz. AP is working in 20/40 mixed mode. I dont think bandwidth change within an A-MPDU is possible. Is there a bug in wireshark or in my inderstanding? kamran