On Fri, Feb 25, 2011 at 10:07 PM, Brian Prodoehl <bprodo...@gmail.com> wrote:
> On Fri, Feb 25, 2011 at 4:02 AM, Thomas Andrews <tandr...@grok.co.za> wrote:
>> Hi,
>>
>> Is DELAYED-BA implemented?
>>
>> I get this error when I try to use it:
>>
>>        "Driver does not support configured HT capability [DELAYED-BA]"
>>
>> I have the following versions installed:
>>
>> Linux atom 2.6.35-22-generic-pae #33-Ubuntu SMP Sun Sep 19 22:14:14 UTC
>> 2010 i686 GNU/Linux
>> hostapd 1:0.6.10-2
>> wpasupplicant 0.6.10-2
>> iw 0.9.19-1
>>
>> This is my hostapd.conf:
>>
>> 8<---------------------------------------------------------
>> interface=wlan0
>> driver=nl80211
>> ssid=test_network
>> channel=36
>> hw_mode=a
>> auth_algs=1
>> wpa=3
>> wpa_passphrase=foobar
>> wpa_key_mgmt=WPA-PSK
>> wpa_pairwise=TKIP CCMP
>> rsn_pairwise=CCMP
>> wme_enabled=1
>> ieee80211n=1
>> ht_capab=[HT40+][SHORT-GI-40][MAX-AMSDU-4000][DELAYED-BA]
>> country_code=US
>> wmm_enabled=1
>> wmm_ac_bk_cwmin=4
>> wmm_ac_bk_cwmax=10
>> wmm_ac_bk_aifs=7
>> wmm_ac_bk_txop_limit=0
>> wmm_ac_bk_acm=0
>> wmm_ac_be_aifs=3
>> wmm_ac_be_cwmin=4
>> wmm_ac_be_cwmax=10
>> wmm_ac_be_txop_limit=0
>> wmm_ac_be_acm=0
>> wmm_ac_vi_aifs=2
>> wmm_ac_vi_cwmin=3
>> wmm_ac_vi_cwmax=4
>> wmm_ac_vi_txop_limit=94
>> wmm_ac_vi_acm=0
>> wmm_ac_vo_aifs=2
>> wmm_ac_vo_cwmin=2
>> wmm_ac_vo_cwmax=3
>> wmm_ac_vo_txop_limit=47
>> wmm_ac_vo_acm=0
>> 8<---------------------------------------------------------
>>
>> Many thanks,
>> Thomas
>
>
> Check the output of iw list.  You'll see something like this:
> Capabilities: 0x11ef
>                        RX LDPC
>                        HT20/HT40
>                        SM Power Save disabled
>                        RX HT20 SGI
>                        RX HT40 SGI
>                        TX STBC
>                        RX STBC 1-stream
>                        Max AMSDU length: 3839 bytes
>                        DSSS/CCK HT40
>
> If you don't see "HT Delayed Block Ack", then no.  Also, your max
> AMSDU size may exceed what the driver/hardware is capable of.
>
> -Brian

Yes you can also use a sniffer "HT info capabilities" and which card
are you using ?
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