I use Intel AX200 card in Ubuntu 20 (kernel 5.8.0-50-generic, Intel fw=55.d9, libpcap=1.9.1) in monitor mode to sniff wireless traffic (iperf data, no encryption). When AP is setup in wifi5 I can see RTS/CTS/Data/BA packets. But when I switch AP to wifi6 then I can only see RTS/CTS/BA, no Data packets at all. Can anyone explain why? Does the Intel firmware support wifi6 data packets to be monitored?
(the AP has very limited settings - in particular I can't control beam forming or OFDMA and I don't think they are ON by default)
@SimonW1 hi, I ecounter this isue too,have you found some method to make it work? Maybe ax210 ax200 just can capture single user mode packets,when the ap is in mu-mimo ofma mode, we have to send the AID to the iwlwifi iwlmvm . but i don't known how to do it?
any one have some ideas? thanks@!
pls give us some advice, the experts from intel!
Still not resolved this. Now that you mentioned mu-mimo - I used iperf option "-P 5" which is 5 parallel data processes. Perhaps indeed this creates mu-mimo ofdma mode at AP. Will check with "-P 1" later
Hi，someone said that if you want to capture mu-ofdma dl packets, you have to send some params to the he_sniffer_params to the iwlmvm kernel driver:
echo 0 00:00:00:00:00:00 > /sys/kernel/debug/iwlwifi/*/iwlmvm/he_sniffer_params
but it's on the jason nano borad system, i can't find it on normal ubuntu such as ubuntu 20.10 with kernel 5.10.
any idea? thanks!
@SimonW1 Him SimonW1
Could you please show me you operation (or command) to capture Data packets? I have tried lots of method but failed.
Could you see Beacon packets or other mgmt frame, such as Probe/Auth/Assoc?