From owner-freebsd-stable@FreeBSD.ORG Fri Mar 10 06:56:22 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CF36416A420 for ; Fri, 10 Mar 2006 06:56:22 +0000 (GMT) (envelope-from dgerow@afflictions.org) Received: from mail.afflictions.org (asylum.afflictions.org [64.7.134.90]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4FD2B43D46 for ; Fri, 10 Mar 2006 06:56:22 +0000 (GMT) (envelope-from dgerow@afflictions.org) Received: from localhost (localhost [127.0.0.1]) by mail.afflictions.org (Postfix) with ESMTP id 1A81F78C8C for ; Fri, 10 Mar 2006 02:04:02 -0500 (EST) Received: from mail.afflictions.org ([127.0.0.1]) by localhost (pandora.afflictions.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 83069-09 for ; Fri, 10 Mar 2006 02:03:57 -0500 (EST) Received: from dementia.afflictions.org (dementia [172.19.206.56]) by mail.afflictions.org (Postfix) with ESMTP id 2933F78C7F for ; Fri, 10 Mar 2006 02:03:56 -0500 (EST) Received: by dementia.afflictions.org (Postfix, from userid 1001) id B4FEB1C080F; Fri, 10 Mar 2006 01:56:14 -0500 (EST) Date: Fri, 10 Mar 2006 01:56:14 -0500 From: Damian Gerow To: freebsd-stable@freebsd.org Message-ID: <20060310065614.GK31158@afflictions.org> References: <20060308231529.GA2049@afflictions.org> <200603101540.21112.doconnor@gsoft.com.au> <20060310052740.GD31158@afflictions.org> <200603100329.49920.joao@matik.com.br> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200603100329.49920.joao@matik.com.br> X-PGP-Fingerprint: B3D7 D901 A53A 1A99 BFD6 E6DF 9F3B 742B C288 9CC9 X-PGP-Key: 0xC2889CC9 User-Agent: Mutt/1.5.11 X-Virus-Scanned: amavisd-new at pandora.afflictions.org Subject: Re: ath(4) and 802.11g speed X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Mar 2006 06:56:23 -0000 Thus spake Daniel O'Connor (doconnor@gsoft.com.au) [10/03/06 01:00]: : Sounds like a question for Sam. Sam? : Actually one thing.. Is the AP set for g mode or b only? 11g mode only. Specifically, autoselect mode 11g, and is currently running at OFDM54. Thus spake JoaoBR (joao@matik.com.br) [10/03/06 01:40]: : > : > Okay, this has me a bit curious, so I dug into it a bit more: : > : > : > : > SSID BSSID CHAN RATE S:N INT CAPS : > : > linksys 00:06:25:7b:25:3d 6 11M 35:0 100 E : > : > MYSSID 00:12:17:85:9a:3b 11 54M 39:0 100 E : > : > wahoo62 00:13:46:47:0f:0e 11 54M 4:0 100 EPS : > : > : > : > I'd have thought that a S:N of 39:0 wouldn't be all that weak, no? : > : > Looking at a post by Sam this past August, he calls 30:0 "very strong", : > : > though that was for an 802.11b link. I'd think that the higher the : > : > number, the stronger the signal. Is the above too weak to handle a : > : > full 54Mbps link? : > : : : generally it is not the signalstrength which let you connect at higher speeds, : it is the noise level. So you can have a low signal without noise and you may : connect at high speed and on the other hand you may have a strong signal and : high noise and the speed is 1Mb or do not connect/associate at all I've been doing some testing with kismet throughout the night, and I've been seeing consistant signal strengths around -50 to -60dBm, with noise sitting pretty consistantly at -96, and its strongest reading (after about six hours) is -90dBm. At least, if I'm to believe what Kismet is telling me. This machine is about five feet (albeit through a concrete wall) from the AP. A wireless laptop that's about twenty feet (again, through concrete) has connected at 54Mbps without issues. : > ----- : > ath0: flags=28943 : > mtu 1500 inet6 fe80::20f:b5ff:fe20:71ed%ath0 prefixlen 64 scopeid 0x1 : > inet 192.168.132.146 netmask 0xffffff00 broadcast 192.168.132.255 : > ether 00:0f:b5:20:71:ed : > media: IEEE 802.11 Wireless Ethernet autoselect : > status: associated : : : tha card default in autoselect is probably 11b so it do not connect at 11g : until you configure it to : : ifconfig mode 11g media OFDM/54mbps : : should do the job,, tha card still connect at lower speed depending on what it : can with the selected AP : : in order to not jumping around you can try setting bssid _MAC_desired_AP_ : : so long as your card is in monitor mode you may not connect nor get traffic at : all I don't mind jumping around (the rate selection stuff is there for a reason), it's that I seemed to be stuck at 11Mbps. I've manually set it up to 54Mbps, and still had good network connectivity.