Hi,
I’ve been using hostapd for ~15 years, but my use has always been very
basic.
I’m using hostapd with a USB Ralink-RT5370-based adapter.
As I understand it, my adapter is a 802.11b/g/n adapter which should
support a 40MHz bandwidth. Running "iw phy" reports:
…
Band 1:
Capabilities: 0x17e
HT20/HT40
SM Power Save disabled
RX Greenfield
RX HT20 SGI
RX HT40 SGI
RX STBC 1-stream
Max AMSDU length: 3839 bytes
No DSSS/CCK HT40
…
Hostapd is configured with:
interface=wlan0
driver=nl80211
…
ssid=…
country_code=FR
ieee80211d=1
hw_mode=g
channel=1
…
ieee80211n=1
ht_capab=[HT40+][SHORT-GI-20][SHORT-GI-40]
…
But as far as I can see, only 20MHz connections are proposed to the
stations that connect to the SSID. On a station, running "iw dev wlp2s0
scan" reports:
…
HT operation:
* primary channel: 1
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: no
* non-GF present: 0
* OBSS non-GF present: 0
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
…
Moreover, on the AP, running "iw dev wlan0 info" reports:
Interface wlan0
…
channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz
Any hint how I can understand why 40MHz is not enabled?
Cheers,
--
Nicolas
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