From owner-freebsd-current@FreeBSD.ORG Sun Jan 3 06:56:09 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 763E61065693 for ; Sun, 3 Jan 2010 06:56:09 +0000 (UTC) (envelope-from ehrmann@gmail.com) Received: from mxout-07.mxes.net (mxout-07.mxes.net [216.86.168.182]) by mx1.freebsd.org (Postfix) with ESMTP id 4FED38FC17 for ; Sun, 3 Jan 2010 06:56:09 +0000 (UTC) Received: from [10.0.0.240] (unknown [64.9.237.22]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTPSA id A910C22E253 for ; Sun, 3 Jan 2010 01:56:02 -0500 (EST) Message-ID: <4B40AFFA.6090706@gmail.com> Date: Sun, 03 Jan 2010 06:55:54 -0800 From: David Ehrmann User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: freebsd-current@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: vge traffic problem X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Jan 2010 06:56:09 -0000 I reported this problem before, but I have a specific, reproducible example, now. I'm running 8.0 RC1. I'm trying to fetch the source to upgrade to 8.0, but this happens: # csup stable-supfile Connected to 72.233.193.64 Receiver: Connection reset by peer Will retry at 22:39:31 tcpdump output of that: http://pastebin.com/m16978f3 (there seem to be a lot of duplicate acks being sent). I tried with a different server, and I tried several times, but generally, the same thing, though I do occasionally get lucky. I have a vr interface on my motherboard, so I gave it an IP address in a different subnet and changed the default gateway to a NAT box with the same default gateway as this box used to have (so I'm using the same internet connection). Suddenly, it works. Reproducibly. I also have issues with samba, but putting that aside, netstat -s -p tcp reported this: tcp: ... 289024537 packets received 116305350 acks (for 1099476725 bytes) 3119202 duplicate acks That's a duplicate ack received for every 37 unique acks. Seems pretty high for traffic on a small LAN, but I could be wrong. I checked the cable; it is cat5e or cat 6. I also tried plugging the vge port into a 10/100 mbps switch, but csup still failed. Ideas? I saw that there were a few recent changes to vge, but I'm not sure if they're related to this.