Arch Linux

sighoya

Member

Registered: 2022-04-16

Posts: 10

Slow speed with Intel AX210 in AP Mode

Hi Guys,

I bought an edup pcie wifi 6E card equipped with an intel AX210 chip on it and two external antennas.

I setup hostapd on it with 5ghz, but the speed for the connecting clients (mt7921k and AX210) can hardly touch that what wifi 5 can.

I tried to search many threads suggesting:
disable_ax
disable_11n
disable power save options

but I still got lame speed.

Current speed:
100mbit-150mbit  ~ 10mbyte-15mbytes

The best config so far is using regular hostapd with channel bandwidth 80Mhz and using wifi 5 (ac) mode instead of wifi 6(ax).

Hostapd:

# Config for Intel WiFi6 AX210
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=test

logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=1

utf8_ssid=1

# use wpa2
wpa=2

# wpa-psk, wpa3 keys
wpa_key_mgmt=WPA-PSK WPA-PSK-SHA256 SAE
wpa_pairwise=TKIP CCMP

#secret
wpa_passphrase=test

#wpa_pairwise=TKIP CCMP
rsn_pairwise=CCMP

# enable pre-authentication
rsn_preauth=1

# lowest supported 5Ghz channel in Finland
channel=149

country_code=DE
# advertise country code and regulatory info
ieee80211d=1

# DFS radar detection
ieee80211h=1

# default driver
driver=nl80211

# a = 5ghz
hw_mode=a

# HT enabled
ieee80211n=1
ht_capab=[HT40+][LDPC][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][DSSS_CCK-40][MAX-AMSDU-7935]

# enable VHT
ieee80211ac=1
# VHT channel width (1 for best compatibility)
vht_oper_chwidth=1
# freq sequence index (magic value, channel+6 or something)
vht_oper_centr_freq_seg0_idx=155
# vht capabilities (consult iw info)
vht_capab=[MAX-MPDU-11454][VHT160][RXLDPC][SHORT-GI-80][SHORT-GI-160][TX-STBC-2BY1][RX-STBC-1][SU-BEAMFORMEE][MU-BEAMFORMEE]

# enable WMM
wmm_enabled=1

# mostly default values for these
rts_threshold=-1
fragm_threshold=-1

beacon_int=100
dtim_period=2
max_num_sta=255

# isolate clients
ap_isolate=1

Compiling and installing hostapd with wifi6 support and enabling ieee80211ax made the result even more worse.

Clients connecting to AX210:
MediaTek 7921:

Connected to 88:d8:2e:99:2b:aa (on wlan0.client)
        SSID: test
        freq: 5745
        RX: 141908376 bytes (104779 packets)
        TX: 191359402 bytes (158205 packets)
        signal: -74 dBm
        rx bitrate: 390.0 MBit/s VHT-MCS 4 80MHz short GI VHT-NSS 2
        tx bitrate: 300.0 MBit/s VHT-MCS 7 40MHz short GI VHT-NSS 2

        bss flags:      short-slot-time
        dtim period:    2
        beacon int:     100

AX210:

Connected to 88:d8:2e:99:2b:aa (on wlan0.client)
        SSID: test
        freq: 5745
        RX: 877585 bytes (9185 packets)
        TX: 69598844 bytes (1559 packets)
        signal: -64 dBm
        rx bitrate: 650.0 MBit/s VHT-MCS 7 80MHz short GI VHT-NSS 2
        tx bitrate: 260.0 MBit/s VHT-MCS 3 80MHz short GI VHT-NSS 2

        bss flags:      short-slot-time
        dtim period:    2
        beacon int:     100

At least I got a high receive rate for around ~40-50MB/s but the other are still around ~15MB/s.

Anyone having better results or ideas how to improve here?

Last edited by sighoya (2022-11-16 21:27:29)