Date: Tue, 19 Jul 2005 21:39:04 -0700 From: Sam Leffler <sam@errno.com> To: Johann Hugo <jhugo@icomtek.csir.co.za> Cc: freebsd-current@freebsd.org Subject: Re: Recent fragility with if_wi, 802.11 adhoc/wep, and Tiger Message-ID: <42DDD568.4030706@errno.com> In-Reply-To: <200507191212.36044.jhugo@icomtek.csir.co.za> References: <20050719094905.F15510@fledge.watson.org> <42DCC637.2050103@FreeBSD.org> <200507191212.36044.jhugo@icomtek.csir.co.za>
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Johann Hugo wrote: > On Tuesday 19 July 2005 11:21, Alex Dupre wrote: > >>Robert Watson wrote: >> >>>I fairly regularly use 802.11 adhoc with WEP to communicate between my >>>6.x/7.x FreeBSD notebook using if_wi, and my Apple PowerBook running Mac >>>OS X Tiger. A few days ago, when I updated from a June to a July HEAD >>>revision, this became quite "fragile". >>>I was wondering if anyone else has seen this problem, though. >> >>I have a (not so) similar problem with my atheros based D-Link DWL-G650 >>card with late CURRENTs. The problem is very strange: I can connect >>stablily to my neighbor's 11g wireless network (even if the signal is >>lower than my D-Link DI-624 AP) and I hardly can connect to my AP. When >>it happens, the connection goes down after few seconds (no carrier) and >>I cannot reconnect anymore. This used to work with older current (about >>a month ago). I though the AP was broken, but I have a 11b device (voip >>phone) that can connect without problems (yes, I tried to connect the >>card in 11b mode, w/ & w/o wep, but it's the same). >>Anyone seeing this? > > > I am also getting problems with my atheros cards. When the connection goes > down I'm seeing a lot of "rx failed 'cuz of PHY err" and "CCK timing" errors. wi != ath I cannot tell if you're operating in adhoc mode as you've provided no details. Last note I recall from you regarded ap mode operation. > > lab3# athstats > 8894 tx management frames > 5 tx frames discarded prior to association > 887 tx failed 'cuz too many retries > 13077 long on-chip tx retries > 7 tx frames with no ack marked > 9969 rx failed 'cuz of bad CRC > 138910 rx failed 'cuz of PHY err > 138888 CCK timing > 22 CCK restart > 1 beacons transmitted > 39 periodic calibrations > 1180 rate control checks > 25 rate control dropped xmit rate > rssi of last ack: 15 > avg recv rssi: 44 > 1 switched default/rx antenna > Antenna profile: > [1] tx 7720 rx 29817 > [2] tx 292 rx 37 > > With tcpdump -y IEEE802_11 I can see the packets, but without -y IEEE802_11 > there is nothing. "1 beacons transmitted" is very odd. Is your athstats out of sync w/ the driver? Try providing basic info if you want help. Sam
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