connecting to B-mode AP
Subsystems (2)
When I connect to b-mode only AP and then run iwconf it shows it as a G-mode AP. I guess when we set frequency it look through all the modes and set the mode to the first channel it founds. since B and G share the same frequencies it will set phymode to G. How can we force it to set phymode to the AP we are associating with.
Why is it necessary to set phymode to B? - a G client can connect perfectly well to a B AP.
Simon
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of mabbas
Sent: Thursday, September 14, 2006 4:25 PM
To: [email protected]
Subject: [d80211] connecting to B-mode AP
When I connect to b-mode only AP and then run iwconf it shows it as a G-mode AP. I guess when we set frequency it look through all the modes and set the mode to the first channel it founds. since B and G share the same frequencies it will set phymode to G. How can we force it to set phymode to the AP we are associating with.
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Quoted 3 lines · Simon Barber
Why is it necessary to set phymode to B? - a G client can connect perfectly well to a B AP.
We need this information for rate scaling and we need to send the NIC different command depends on the AP connection type. Mohamed
Quoted 23 lines
Simon
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of mabbas
Sent: Thursday, September 14, 2006 4:25 PM
To: [email protected]
Subject: [d80211] connecting to B-mode APWhen I connect to b-mode only AP and then run iwconf it shows it as a G-mode AP. I guess when we set frequency it look through all the modes and set the mode to the first channel it founds. since B and G share the same frequencies it will set phymode to G. How can we force it to set phymode to the AP we are associating with.
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But it's not the AP connection type that determines what rates are available - it's the available rate set - this is independent of whether the card is B or G. A G AP may only advertise B rates, even though it's a G AP. I still don't see any need to change the phytype.
Simon
-----Original Message-----
From: mabbas [mailto:[email protected]]
Sent: Friday, September 15, 2006 10:19 AM
To: Simon Barber
Cc: [email protected]
Subject: Re: [d80211] connecting to B-mode AP
Quoted 3 lines · Simon Barber
Why is it necessary to set phymode to B? - a G client can connect perfectly well to a B AP.
We need this information for rate scaling and we need to send the NIC different command depends on the AP connection type. Mohamed
Quoted 27 lines
Simon
-----Original Message-----
From: [email protected]
[mailto:[email protected]]
On Behalf Of mabbas
Sent: Thursday, September 14, 2006 4:25 PM
To: [email protected]
Subject: [d80211] connecting to B-mode APWhen I connect to b-mode only AP and then run iwconf it shows it as a G-mode AP. I guess when we set frequency it look through all the modes
and set the mode to the first channel it founds. since B and G share the same frequencies it will set phymode to G. How can we force it to set phymode to the AP we are associating with.
-
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I see your point here, although some one will file some bugs against the driver about showing G while associating with B-mode AP. By the way how can you figure if the AP is B/G other than the rates?
Quoted 56 lines · Simon Barber
But it's not the AP connection type that determines what rates are available - it's the available rate set - this is independent of whether the card is B or G. A G AP may only advertise B rates, even though it's a G AP. I still don't see any need to change the phytype.
Simon
-----Original Message-----
From: mabbas [mailto:[email protected]] Sent: Friday, September 15, 2006 10:19 AM
To: Simon Barber
Cc: [email protected]
Subject: Re: [d80211] connecting to B-mode APQuoted 3 lines · Simon Barber
Why is it necessary to set phymode to B? - a G client can connect perfectly well to a B AP.
We need this information for rate scaling and we need to send the NIC different command depends on the AP connection type. Mohamed
Quoted 19 lines
Simon
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of mabbas
Sent: Thursday, September 14, 2006 4:25 PM
To: [email protected]
Subject: [d80211] connecting to B-mode APWhen I connect to b-mode only AP and then run iwconf it shows it as a G-mode AP. I guess when we set frequency it look through all the modes
and set the mode to the first channel it founds. since B and G share the same frequencies it will set phymode to G. How can we force it to set phymode to the AP we are associating with. -
To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [email protected] More majordomo infoQuoted 9 lines
at http://vger.kernel.org/majordomo-info.html
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Quoted 4 lines · mabbas
I see your point here, although some one will file some bugs against the driver about showing G while associating with B-mode AP. By the way how can you figure if the AP is B/G other than the rates?
IIRC, only 802.11g APs will send the extended rate information element, though I don't know if forcing 802.11b on the AP will cause it to stop sending that. (but it might still be okay if it doesn't - it's still a 802.11g AP, with the faster speeds turned off..)
-Michael Wu
The extended rates element is only needed if there are more than 8 rates to report - which is normal for G operation, but not necessary. It only exists because a particularly popular old 11b MAC codebase crashed when the normal rate element had more than 8 elements, and this hurt interoperability with early G AP implementations - so the spec was changed.
Simon
-----Original Message-----
From: Michael Wu [mailto:[email protected]]
Sent: Saturday, September 16, 2006 10:05 AM
To: mabbas
Cc: Simon Barber; [email protected]
Subject: Re: [d80211] connecting to B-mode AP
Quoted 4 lines · mabbas
I see your point here, although some one will file some bugs against the driver about showing G while associating with B-mode AP. By the way how can you figure if the AP is B/G other than the rates?
IIRC, only 802.11g APs will send the extended rate information element, though I don't know if forcing 802.11b on the AP will cause it to stop sending that.
(but it might still be okay if it doesn't - it's still a 802.11g AP, with the faster speeds turned off..)
-Michael Wu
Quoted 3 lines · mabbas
I see your point here, although some one will file some bugs against the driver about showing G while associating with B-mode AP. By the way how can you figure if the AP is B/G other than the rates?
I don't think this will happen.
This never happened with bcm43xx, for example. The PHY description of the card is something _completely_ different than the AP's PHY. People know that G is backwards compatible to B. And people who don't even know that, don't care anyway. ;)
Signature · 1 line
Greetings Michael.