From owner-freebsd-net@FreeBSD.ORG Mon Mar 26 20:14:54 2012 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D6984106564A for ; Mon, 26 Mar 2012 20:14:54 +0000 (UTC) (envelope-from andrey@zonov.org) Received: from mail-bk0-f54.google.com (mail-bk0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id 5831B8FC08 for ; Mon, 26 Mar 2012 20:14:54 +0000 (UTC) Received: by bkcjc3 with SMTP id jc3so5938471bkc.13 for ; Mon, 26 Mar 2012 13:14:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding :x-gm-message-state; bh=6VYrFj06DC96eLde/NV9/sOtBonzEXHF7nXrO0Mljwk=; b=dQ0McOOITfajZtNSOLBMcmOIOlrbbtOY9+bXQq+UfZHfKHLeOhJiNE4Rajj/4kzGGI eD54HTcr0caTRv6UHVpovm846gDVRiNh7HIMffh9nIHBl9RtTRwjpbZ4lN5jiQlfkNYt HIMuxbeO9xYFrLhHr5L5nMxOJSUHA4gwVUJkWxtw0c3TVvqnqDSw8hu5HvMkJZPnAaQ4 1RCwAtPkvVMdRKkzST1QI8z8xqSW7QKNle6Ppij4oFIxGFQqpRCqwVzcc8AO9gSWcRhf 58VlMeK5C+7UEcIqdLEe7Cza4OKaoM4caKMSZTWIvEaf3xoPbT5qmbIYyLKotozEQSqS q4fA== Received: by 10.204.156.79 with SMTP id v15mr8865938bkw.37.1332792893094; Mon, 26 Mar 2012 13:14:53 -0700 (PDT) Received: from [10.254.254.77] (ppp95-165-136-26.pppoe.spdop.ru. [95.165.136.26]) by mx.google.com with ESMTPS id c4sm16784970bkh.0.2012.03.26.13.14.52 (version=SSLv3 cipher=OTHER); Mon, 26 Mar 2012 13:14:52 -0700 (PDT) Message-ID: <4F70CE3A.7050808@zonov.org> Date: Tue, 27 Mar 2012 00:14:50 +0400 From: Andrey Zonov User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.24) Gecko/20100228 Thunderbird/2.0.0.24 Mnenhy/0.7.6.0 MIME-Version: 1.0 To: =?windows-1251?Q?=C2=EB=E0=E4=E8=F1=EB=E0=E2_=CF=F0=EE=E4=E0=ED?= References: <8904.1332769428.5720084203749900288@ffe15.ukr.net> <4F70CC46.1070409@zonov.org> In-Reply-To: <4F70CC46.1070409@zonov.org> Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: 8bit X-Gm-Message-State: ALoCoQmfmeGj1DnOXEQz5UmUJAOwHb3haicpg832dyoyYR9ACxt4ZtNHti8k65ouoA5eCFnxTrk9 Cc: net@freebsd.org Subject: Re: The problem with MTU <1500 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: Mon, 26 Mar 2012 20:14:54 -0000 On 27.03.2012 0:06, Andrey Zonov wrote: > On 26.03.2012 17:43, Владислав Продан wrote: >> >> Dear all! >> I have two different values of uplink MTU - 1440 and 1492. >> And in a local network - 1500. >> In Cisco routers can be set 'set ip df 0', but I have no such router :( >> What options are there for FreeBSD? > > sysctl net.inet.tcp.path_mtu_discovery=0 Ooops, please ignore this. > >> Only use the net/tcpmssd? >> Will it be possible to process both two channels of 1Gb? >> >> > -- Andrey Zonov