From owner-freebsd-net@FreeBSD.ORG Sat Apr 30 15:35:24 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 28E89106566B for ; Sat, 30 Apr 2011 15:35:24 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-vx0-f182.google.com (mail-vx0-f182.google.com [209.85.220.182]) by mx1.freebsd.org (Postfix) with ESMTP id D22328FC16 for ; Sat, 30 Apr 2011 15:35:23 +0000 (UTC) Received: by vxc34 with SMTP id 34so4557447vxc.13 for ; Sat, 30 Apr 2011 08:35:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=eSSAQJzZrk2kIBRl1JwK+ehyVFMuovC3YrHs1qF5AEc=; b=rFS8uIkc+a3Jqaf0SELZtou2HRhJjqET4CkQvUw2hB27mWh9bPQ4pg7wQ66grFVDly S28kWoF1RsVuRC5eD/RX26wyWLSWa+NkLzGxIfj/0hiVKyasCos3f4AliPBpaBRZcwVR kId3GG8I/ohOKMg/o257B22AfUFEsjAyLC7Ok= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; b=tvmS6gDA237cSwdSVCTB7KEzxpzR9eRlatpPKfEA9hvxvcF7uJry7f/4fm1lFDfGS+ /To25pAOTuL7yTqZs9pg7tkraiLlPlJopTFvEcJ4dC9MbXDBeS4dS51ZuKAiVegX8eE0 IqHrlgFqRp5HClsbSU1YBRojvP0lETRa0v+UY= MIME-Version: 1.0 Received: by 10.52.74.37 with SMTP id q5mr1482902vdv.182.1304177722964; Sat, 30 Apr 2011 08:35:22 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.52.157.202 with HTTP; Sat, 30 Apr 2011 08:35:22 -0700 (PDT) In-Reply-To: <20110429185605.GB21084@michelle.cdnetworks.com> References: <201104290001.p3T01EvQ082443@artema.vpn.ibs> <20110429095231.GA17786@relay.ibs.dn.ua> <20110429182807.GA21084@michelle.cdnetworks.com> <20110429184634.GA34176@relay.ibs.dn.ua> <20110429185605.GB21084@michelle.cdnetworks.com> Date: Sat, 30 Apr 2011 23:35:22 +0800 X-Google-Sender-Auth: 2CkWynFXkQlhBptftCbhM9B8yFs Message-ID: From: Adrian Chadd To: pyunyh@gmail.com Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-net@freebsd.org Subject: Re: collisions on tun interfaces ... X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Apr 2011 15:35:24 -0000 On 30 April 2011 02:56, YongHyeon PYUN wrote: > Sending lots of packets within short interval may overflow > interface's send queue. Try sending UDP packets with netperf and > see what counters are changed during the test with something like > "netstat -ndI tun0 -w 1". The default sendq is 50. What about considering bumping that? Adrian