From owner-freebsd-net@FreeBSD.ORG Tue Jul 27 15:01:57 2010 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 0CF541065679; Tue, 27 Jul 2010 15:01:57 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout030.mac.com (asmtpout030.mac.com [17.148.16.105]) by mx1.freebsd.org (Postfix) with ESMTP id E8AD18FC14; Tue, 27 Jul 2010 15:01:56 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=us-ascii Received: from [10.1.1.80] ([173.200.178.70]) by asmtp030.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0L67007Y9YYSD870@asmtp030.mac.com>; Tue, 27 Jul 2010 07:01:42 -0700 (PDT) X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1004200000 definitions=main-1007270085 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.0.10011,1.0.148,0.0.0000 definitions=2010-07-27_05:2010-07-27, 2010-07-27, 1970-01-01 signatures=0 From: Chuck Swiger X-Priority: 3 (Normal) In-reply-to: <5610530046.20100727091422@serebryakov.spb.ru> Date: Tue, 27 Jul 2010 07:01:40 -0700 Message-id: References: <5610530046.20100727091422@serebryakov.spb.ru> To: Lev Serebryakov X-Mailer: Apple Mail (2.1081) Cc: freebsd-net@FreeBSD.org Subject: Re: does if_vr export true packet error statistics? 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: Tue, 27 Jul 2010 15:01:57 -0000 Hi, Lev-- On Jul 26, 2010, at 10:14 PM, Lev Serebryakov wrote: > I have huge losses ("netstat -s -p tcp" shows 4% of packets, but > 35% of bytes are retransmitted) on my intenret connection, which is PPPoE over > 100Mbit ehternet link. This description means larger packets are having problems. Have you adjusted MTU and MRU down to 1492 (or possibly smaller like 1488 or 1480) since PPPoE is in use? An MTU-aware traceroute or something like http://www.dslreports.com/tweak might be informative. Regards, -- -Chuck