[support] RAs leaking into adjacent wifi networks

Georgopoulos, Panagiotis panos at comp.lancs.ac.uk
Fri Sep 4 00:31:13 JST 2009


Hello Arnaud,

	Thanks for your reply. 

> -----Original Message-----
> From: Arnaud Ebalard [mailto:arno at natisbad.org]
> Sent: 03 September 2009 15:09
> To: Georgopoulos, Panagiotis
> Cc: support at jules.nautilus6.org
> Subject: Re: [support] RAs leaking into adjacent wifi networks

(snip)

> 
> Basically, the card should not accept the frame relayed by AP2 because
> it is not associated with it (even if channel are the same or close).
> 

I know, it is like Layer 2 messes things up...:-/


> Are AP1 and AP2 on close channels (like 6 and 7) 

The sta interface is connected to AP1 (channel 2) but hears RAs from AP2
(channel 5). When I bring AP2 down, it hears RAs from AP3 which operates in
channel 7. I might try to use channels that are far away, e.g. 1, 7, and 13
to see what happens.

>and have you by (lack of) luck put the interface of the MR in promiscuous
mode?

Hm, that is interesting. I thought of that before, and I realized that I
have not explicitly configured the interface to work in promiscuous mode,
however I did at some point enable promiscuous mode in wireshark. I am not
quite sure how this affect the operation of the madwifi drivers, but in
order to debug my mobility testing I have to use wireshark and capture
traffic in promiscuous mode...:-/


> 
> Just a guess though. You should definitely ask on madwifi ml. If you
> happen to find the root of the issue, I'll be interested.
> 

No responses on the madwifi mailing list... I can inform you if I find
something. Are you interested in this because you have experienced this
behaviour yourself or is it just a generic interest ? ;-)

Is it something that you hear first time?

Cheers,
Panos





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