On 16/01/2014 15:03, Aaron Wood wrote:

All,

I'm noting this here in case anyone is interested. After I write this up, I'm going to start from scratch on the configuration, and factory-reset the router.

=====

The 5GHz radio on my 3800 seems to be in a very odd state. I'm not quire sure what state it's in, but it seems to be only doing HT20 1x1. And in a fairly broken manner at that.

<snip>

And here are radio blocks from the current /etc/config/wireless:

config wifi-device 'radio1'

option type 'mac80211'

option macaddr '28:c6:8e:bb:9a:49'

list ht_capab 'SHORT-GI-40'

list ht_capab 'TX-STBC'

list ht_capab 'RX-STBC1'

list ht_capab 'DSSS_CCK-40'

option txpower '17'

option distance '25'

option channel '48'

option country 'US'

That's interesting, since it's missing a few configuration options and seems to be still using the US country code for the 5 GHz interface. For what it's worth, my router's configuration looks like this (with the MAC address changed to match your configuration):

config wifi-device 'radio1'
        option type 'mac80211'
        option channel '36'
        option hwmode '11na'
        option macaddr '28:c6:8e:bb:9a:49'
        list ht_capab 'SHORT-GI-40'
        list ht_capab 'TX-STBC'
        list ht_capab 'RX-STBC1'
        list ht_capab 'DSSS_CCK-40'
        option disabled '0'
        option txpower '17'
        option country 'GB'
        option htmode 'HT40+'

I'm using channel 36 and HT40+ here at 17 dBm. This is also from a UK-based router, so you'll probably want to change the country code from GB to FR. I'm seeing about 270 Mb/s using Intel wireless (4965AGN) and Windows 7 about 2.5 m away from the router with those settings.

config wifi-device 'radio0'

option type 'mac80211'

option hwmode '11ng'

option macaddr '28:c6:8e:bb:9a:47'

option htmode 'HT20'

list ht_capab 'SHORT-GI-40'

list ht_capab 'TX-STBC'

list ht_capab 'RX-STBC1'

list ht_capab 'DSSS_CCK-40'

option txpower '26'

option country 'FR'

option distance '15'

option channel 'auto'

My settings for the 2.4 GHz side (deliberately limited to HT20 to avoid interference):

config wifi-device 'radio0'
        option type 'mac80211'
        option hwmode '11ng'
        option macaddr '28:c6:8e:bb:9a:47'
        option htmode 'HT20'
        list ht_capab 'SHORT-GI-40'
        list ht_capab 'TX-STBC'
        list ht_capab 'RX-STBC1'
        list ht_capab 'DSSS_CCK-40'
        option disabled '0'
        option channel '1'
        option country 'GB'
        option txpower '20'

This time I'm using channel 1 at 20 dBm. In both of these blocks I'm leaving the distance option unspecified.

Hope this helps a bit!

-- 
Robert Bradley