Hi Jouni,
This is with OpenWRT trunk revised to use compat-wireless 2009-02-16
and hostapd 0.6.8 instead of 0.6.7. On a ar9130 CPU (MIPS) with
ar9102 radio chip - Trendnet TEW-652BRP router. iw is version 0.9.9
r...@openwrt:/# iw list
Wiphy phy0
Band 1:
HT capabilities: 0x104e
* 20/40 MHz operation
* SM PS disabled
* 40 MHz short GI
* max A-MSDU len 3839
* DSSS/CCK 40 MHz
HT A-MPDU factor: 0x0003 (65535 bytes)
HT A-MPDU density: 0x0006 (8 usec)
HT MCS set: ff ff 00 00 00 00 00 00 00 00 00 00 01 00 00 00
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (disabled)
* 2472 MHz [13] (disabled)
* 2484 MHz [14] (disabled)
Bitrates:
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Supported interface modes:
* IBSS
* Station
* AP
* AP(VLAN)
* Monitor
It's all kind of confusing to confirm what mode / data rate the AP is
in. Two of us on OpenWRT forum were using an Apple OS X client
machines with an Atheros N chipset. It is possible from the OS X side
to run a program called "AP Grapher" and clearly see the stability of
the connection and maximum data rate. It will depect "54/130" and
retrains as 0/130 briefly. As Apple uses Atheros chips so commonly,
assumption is that the OS X driver is a known good one and stable
reference.
There is some confusion on our part (ar9102 and ar9103 OpenWRT users)
as to exactly how to go about controlling N mode on ath9k and hostapd.
Ultimately the OpenWRT UCI and LUCI GUI need to be enhanced to support
things such as N/NA only, 20/40 settings, dual-band channel picking
for 600Mbps simultaneous mode (Atheros AR9002AP platform, which
consists of the AR9220 and AR9223 dual-band radio chipset - anyone
seen them for sale yet?).
Any and all walkthroughs of constructing ht_capab appreciated ;)
With 0.6.7 we had default which gave us G-only. Or we could revise
hostapd config with:
ieee80211n=1
ht_capab=[SHORT-GI-20][TX-STBC][RX-STBC12][DELAYED-BA]
And were able to connect at 130Mbps from OS X Atheros client. I'm mot
sure anyone ever figured out how to get 40Mhz (300Mbps) mode.
Thanks for your reply.
On Tue, Feb 17, 2009 at 8:58 AM, Jouni Malinen
<jouni.mali...@atheros.com> wrote:
> On Tue, 2009-02-17 at 08:48 -0800, Stephen Gutknecht (hilltx) wrote:
>
>> A new hostapd was just released as stable, version 0.6.8, and I'm
>> fighting some issues with it rejecting ht_capab that worked in 0.6.7
>> at the moment.
>
> hostapd is now rejecting ht_capab options that the driver does not
> support. You can see the supported set with iw phy phy# info.
>
>> BTW, has anyone figure out how to tell hotapd to run
>> in N-only mode or NA-only mode?
>
> There is currently no parameter to enforce 802.11n-only mode (i.e.,
> reject 802.11g/802.11a non-HT associations).
>
> - Jouni
>
>
>
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