iwconfig Bit Rate for 802.11n 40Mhz

Mohammed Shafi shafi.ath9k at gmail.com
Wed Apr 6 03:06:28 EDT 2011


On Wed, Apr 6, 2011 at 10:44 AM, Curtis Larsen <curtlarsen at gmail.com> wrote:
> Hello,
>
> I am using  wpa_supplicant 0.7.1, ubuntu 10.04, Atheros AR9280.
>
> When I connect to an 802.11n *20mhz* (channel 36) SSID and do
> "iwconfig" I get the following output:
>
> wlan2     IEEE 802.11abgn  ESSID:"WIFI"
>          Mode:Managed  Frequency:5.18 GHz  Access Point: 00:26:CB:90:7B:B0
>          Bit Rate=156 Mb/s   Tx-Power=30 dBm
>          Retry  long limit:7   RTS thr:off   Fragment thr:off
>          Power Management:on
>          Link Quality=49/70  Signal level=-61 dBm
>          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> When I connect to an 802.11n *40mhz* (Channel 36+40) network and do
> "iwconfig" I get the following output:
>
> wlan2     IEEE 802.11abgn  ESSID:"WIFI"
>          Mode:Managed  Frequency:5.18 GHz  Access Point: 00:26:CB:90:7B:B0
>          Bit Rate=0 kb/s   Tx-Power=30 dBm
>          Retry  long limit:7   RTS thr:off   Fragment thr:off
>          Power Management:on
>          Link Quality=46/70  Signal level=-64 dBm
>          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> ...The Bit Rate is always "0 kb/s".  How can I get iwconfig (or
> perhaps another linux CLI tool) to display the correct Bit Rate when
> using 40Mhz wide channels?

Please try the following
*iw dev wlan2 link (does txbitrate shows some value)
*please install the latest compat wireless
*ping the AP and compare the output of iwconfig and iw dev wlan2 link

>
> Thanks,
>
> Curtis
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