From owner-freebsd-net@FreeBSD.ORG Sun Sep 28 22:15:45 2008 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 126331065689 for ; Sun, 28 Sep 2008 22:15:45 +0000 (UTC) (envelope-from firmdog@gmail.com) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.152]) by mx1.freebsd.org (Postfix) with ESMTP id 8E0A18FC0C for ; Sun, 28 Sep 2008 22:15:44 +0000 (UTC) (envelope-from firmdog@gmail.com) Received: by fg-out-1718.google.com with SMTP id l26so1204852fgb.35 for ; Sun, 28 Sep 2008 15:15:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type:references; bh=bFwDIMAFTWkrm4BD2n4hUZfKLZ2xppr0l0fHaWVTQx8=; b=j/igaZVUHfT25Upa1TwNkJnJLp78IaM4qBnPRnpLyXTCxc266lm3uEEBZy7nP49n7K P2tuvtqVba3X9PjdK8mYLPNS6yxH42b0vrPTreelHb1ohenwMS5atCq0BVuzRMQJPtD1 CsuZtx+h31RVGIykO5yKf6Rrp0Ed8RGYLS9uM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:references; b=WGXf3BmNndi518X3h0AvcZrKRiIOjJpW8eLN8Fia53qD7j/Oz/yV/infINAuwEVImJ V2wP/Z3PTHJFiR+NnQUL3aVWgc+bLKoHngTw+lDQd32tLzzt/gmA9ZT1HMee+rK9o8i7 YSO9SIqIrS1B84d88xso7HyfiMyGtZKBv9p/U= Received: by 10.86.74.15 with SMTP id w15mr3601064fga.42.1222640143170; Sun, 28 Sep 2008 15:15:43 -0700 (PDT) Received: by 10.86.82.4 with HTTP; Sun, 28 Sep 2008 15:15:43 -0700 (PDT) Message-ID: Date: Sun, 28 Sep 2008 18:15:43 -0400 From: "firmdog@gmail.com" To: "Gary Palmer" In-Reply-To: <20080928205300.GF60230@in-addr.com> MIME-Version: 1.0 References: <20080928205300.GF60230@in-addr.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: stable@freebsd.org, net@freebsd.org Subject: Re: 7.1-PRERELEASE : bad network performance (nfe0) 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: Sun, 28 Sep 2008 22:15:45 -0000 On Sun, Sep 28, 2008 at 4:53 PM, Gary Palmer wrote: > On Sun, Sep 28, 2008 at 01:43:12PM -0400, firmdog@gmail.com wrote: > > I have the same problem on a Dell Poweredge SC440 when I transferred over > > 50GB > > from a FreeBSD 5.4 box to my new Dell running 7.1. Used a crossover > cable > > and > > the link was 1000 full duplex, but could only get about 10M/s. Very odd. > > Did a > > tcpdump and saw lots of bad checksum errors. > > > > What other troubleshooting steps can we take? What could be the problem? > > Please post the first few lines of ifconfig for bge0. I'm suspecting > you'll see something like > > em1: flags=8843 mtu 1500 > options=1b > > (yes, I know thats an em, not bge, but I don't have any bge's around > here) > > Note that the options line say that receive and transmit checksum > offloading is enabled. This means that for packets transmitted > by this system, tcpdump will show checksum errors as the kernel > is not generating the checksums, the ethernet card will. Since > tcpdump is seeting the packet before the ethernet card does its > magic, you get the checksum errors on transmit. Received packets > should be fine though. > > Regards, > > Gary > Pasted below. When I was doing the transfer, it was 1000 full duplex and was very slow. This is a web/email/database server and I don't see any performance problems yet, but I would like to know what the problem is/was. What else can I provide? bge0: flags=8843 metric 0 mtu 1500 options=9b ether 00:1a:a0:23:c0:03 inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255 media: Ethernet autoselect (100baseTX ) status: active