On Tue, 2009-02-17 at 09:28 -0800, Stephen Gutknecht (hilltx) wrote:

> 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.

ath9k does not currently advertise support for any of the options you
mention above in ht_capab, so they will need to be removed when using
ath9k.

802.11g:

channel=1..11
hw_mode=g

802.11ng (802.11g and 802.11n with HT20):

channel=1..11
hw_mode=g
ieee80211n=1

802.11ng (802.11g and 802.11n with HT20/40):

channel=6
hw_mode=g
ieee80211n=1
ht_capab=[HT40-]

(see hostapd.conf for limitations on which channels and HT40- vs. HT40+
options are allowed; please note that use of 40 MHz will get even more
limited in future when some additional co-existence checks are added;
some of those are already in hostapd 0.7.x branch)

You can add [SHORT-GI-40] to ht_capab to enable short guard interval for
20/40 MHz mode (i.e., when [HT40-] or [HT40+] is included).

- Jouni


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