Re: NM and 802.11a

[Dan Williams <dcbw redhat com>]

On Tue, 2007-11-13 at 15:10 -0400, Joel Goguen wrote:
> I'm having some trouble using a 802.11a network.  I can connect to a
> 802.11g network fine, but I can't even see the 802.11a network.  They're
> being broadcast from the same access points, and if I search for them
> using iwlist the a/g all show up.  Unfortunately, there's no area where
> only 802.11a is broadcast so I don't know if NM would pick it up with no
> 802.11g network in range.
> 
> Is there a way I can specify that I want NM to connect to 802.11a for a
> specific set of SSIDs (or even just one SSID) and whatever is available
> for other SSIDs?  I'm using 0.6.5 on Ubuntu Gutsy if that's any help.

Not for 0.6.5 there isn't.  0.7 splits the APs apart based on a couple
of properties.  Basically, the frequency is up to the card, since
wpa_supplicant can't currently handle being told what frequency to use
anyway.  This needs fixes in wpa_supplicant even with NM 0.7.

Dan

> Here's what I get from iwlist:
> ath0    Scan completed :
>         Cell 01 - Address: 00:18:B0:82:55:C0
>                 ESSID:"Wireless UNB"
>                 Mode:Master
>                 Frequency:2.412 GHz (Channel 1)
>                 Quality=24/70  Signal level=-71 dBm  Noise level=-95 dBm
>                 Encryption key:on
>                 Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
>                           11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
>                           48 Mb/s; 54 Mb/s
>                 Extra:bcn_int=100
>                 IE: WPA Version 1
>                     Group Cipher : WEP-40
>                     Pairwise Ciphers (1) : WEP-40
>                     Authentication Suites (1) : 802.1x
> Extra:wme_ie=dd180050f2020101010003a4000027a4000042435e0062322f00
> <snip other 2.4GHz range results>
>         Cell 08 - Address: 00:18:B0:81:CD:41
>                 ESSID:"Wireless UNB"
>                 Mode:Master
>                 Frequency:5.26 GHz (Channel 52)
>                 Quality=32/70  Signal level=-63 dBm  Noise level=-95 dBm
>                 Encryption key:on
>                 Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
>                           36 Mb/s; 48 Mb/s; 54 Mb/s
>                 Extra:bcn_int=100
>                 IE: WPA Version 1
>                     Group Cipher : WEP-40
>                     Pairwise Ciphers (1) : WEP-40
>                     Authentication Suites (1) : 802.1x
> Extra:wme_ie=dd180050f2020101010003a4000027a4000042435e0062322f00
> 
>