iwconfig Bit Rate for 802.11n 40Mhz

[Mohammed Shafi]

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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