From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-x234.google.com (mail-wr0-x234.google.com [IPv6:2a00:1450:400c:c0c::234]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id A10A23B2A4 for ; Wed, 15 Feb 2017 04:26:49 -0500 (EST) Received: by mail-wr0-x234.google.com with SMTP id i10so186859638wrb.0 for ; Wed, 15 Feb 2017 01:26:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:subject:message-id:date:to :mime-version; bh=kfSHCwBd217Rm867P///UsCNBhvE+7oCEoVC6g2dJEU=; b=UyGWhM0VNvU6XKS9Y6VjCaY853iNSWbDfL5o/Pg8G985EgSbjRe5YaaA1+0Zn72mWp GA8jIbok9PBDOq9Fju7qsOay2xQW9redSlCBNbaBG2CB3hOVjSJTQHDpP0UprWdaYe2m KE1BOM+L4anoa6wNhNDevY3FGmKV/HnZ2Eb1AA+eoyhjT0hfD4exUMoPl5b9jzWalQDL XceK5OJ1rpuHFNzimOPvoZuiVdYddprjG9Zif7NSuni2RWsiZ4dxaOS5sy2XqptCcBsu A7VvddKXyu8hxQhPPeiH6AChoL3Q+YRYtlDYWf4DUt/ZWi+wvdpISEC8Hc4la+BtiJYm fS4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:subject :message-id:date:to:mime-version; bh=kfSHCwBd217Rm867P///UsCNBhvE+7oCEoVC6g2dJEU=; b=TJq0oM1RK/MtaVOhOiCty/b11/Sa1MnmJyoJgYYNHab7R360DjUuMd1sGfO3BcSDPI esEWudL5X01p0aWT9lVVIlRgBgZZflYU3xG68bQirA/39Kdlh6rvvZG5RUAcO3cWcRZs 0idk2WI0mYvU/+VAZqN1t/OoUXuBDfN4yCLFGEQDOfL4ZO/nvuH4MlasGmu7+f+gDVDs 9tiv8ilydgd4+ibo+RiazDK42RtJGUHrwjsfVpjrO2krHL8TygqvJRxV/nN3Lo91suDh 3+aAikevHDQ2dqj+msWYJDUPCk/XQf0hstARBSXZZQuumRU3zmDObKdfwgbisitaDsi4 fLog== X-Gm-Message-State: AMke39mUxpjkJq2H+M8pYpeYwDNETiGw6e5G9gD4eEB+HoKp8jS7DpxPX8bZPSJnvQ1E4Q== X-Received: by 10.223.151.214 with SMTP id t22mr27925051wrb.2.1487150807428; Wed, 15 Feb 2017 01:26:47 -0800 (PST) Received: from [10.72.0.34] (h-1169.lbcfree.net. [185.99.119.68]) by smtp.gmail.com with ESMTPSA id m29sm4096490wrm.38.2017.02.15.01.26.46 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 15 Feb 2017 01:26:46 -0800 (PST) From: Pete Heist Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Message-Id: Date: Wed, 15 Feb 2017 10:27:04 +0100 To: make-wifi-fast@lists.bufferbloat.net Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Subject: [Make-wifi-fast] CTS protection X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Feb 2017 09:26:49 -0000 Does anyone know how to disable CTS protection in LEDE (rc2)? I=E2=80=99ve been running into problems in my testing on the = OM2P-HS/LEDE where throughput suddenly drops from ~90Mbps to ~60Mbps, = and rrul latency skyrockets, even though the signal and MCS level stay = the same. I narrowed this down to the bss flag CTS-protection: # iperf3 throughput: ~90 Mbps root@om1:~# iw dev wlan0 link Connected to ac:86:74:26:aa:aa (on wlan0) ... signal: -46 dBm tx bitrate: 144.4 MBit/s MCS 15 short GI bss flags: short-preamble short-slot-time ... # iperf3 throughput drops to ~60 Mbps root@om1:~# iw dev wlan0 link Connected to ac:86:74:26:aa:aa (on wlan0) =E2=80=A6 signal: -46 dBm tx bitrate: 144.4 MBit/s MCS 15 short GI bss flags: CTS-protection short-preamble short-slot-time ... The flag seems to flip on and off when making tiny changes to router = placement, or sometimes seemingly randomly. I suspect it may be because = of a distant network also on Channel 1 (scan shows it has a signal of = -88), because I seem to be avoiding it for now by swapping with my home = network and moving to Channel 6. Maybe those tiny router placement = changes were making the distant network either visible or not to the = router. So I=E2=80=99d be glad if I could just manually disable CTS protection, = when I know I=E2=80=99ve only got a point-to-point connection and any = other networks on the same channel are rather distant. Also, I suppose this is another example of the difficulty of fixed rate = limiting, particularly on crowded frequencies. Pete