Date: Thu, 21 Feb 2008 16:54:38 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: Niki Denev <nike_d@cytexbg.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, "Eric L. Chen" <d9364104@mail.nchu.edu.tw>, Robert Backhaus <robbak@robbak.com> Subject: Re: Packet corruption in re0 Message-ID: <20080221075438.GD26427@cdnetworks.co.kr> In-Reply-To: <2e77fc10802202343j2ac419bay89a2442a4832b2d@mail.gmail.com> References: <d4499580802201703t1dcc3143x96e85cd8e562489@mail.gmail.com> <1203570954.1696.2.camel@localhost> <2e77fc10802202343j2ac419bay89a2442a4832b2d@mail.gmail.com>
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On Thu, Feb 21, 2008 at 07:43:18AM +0000, Niki Denev wrote: > On Thu, Feb 21, 2008 at 5:15 AM, Eric L. Chen <d9364104@mail.nchu.edu.tw> wrote: > > > > > > On Thu, 2008-02-21 at 11:03 +1000, Robert Backhaus wrote: > > > I am experiencing roughly 15% packet corruption on the re interface on > > > my freebsd 7/amd64 box. > > > > > > FreeBSD gw.flexi.robbak.com 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #8: > > > Tue Feb 5 09:49:55 EST 2008 > > > root@gw.flexi.robbak.com:/usr/obj/usr/src/sys/GW amd64 > > > > > > The attached 3 files demonstrate the problem: "ping" shows the output > > > of ping -c 100, and shows 15% packet loss. "tcpdump" shows the packets > > > leaving, and some of the lost packets being returned with addresses, > > > ports and data corrupted. The data in these packets seems to be coming > > > from other packets passing through other interfaces at the time. > > > "remote-tcpdump" shows the packets being received and returned from > > > the other machine. Note that some packets are being corrupted on the > > > way out, too. > > > > > > Just to make troubleshooting difficult, this problem only shows up > > > after the system has been up for roughly 36 hours, depending on the > > > amount of traffic. > > > > > > I am using the latest bios that I am aware of. The bios that I > > > recently applied did include a firmware update for the realtek > > > interface, but this did not affect the problem. > > > _______________________________________________ > > > > I disabled some hw features and works fine. > > like this (/etc/rc.conf) > > ifconfig_re0="inet 192.168.1.10 netmask 255.255.255.0 -rxcsum -txcsum > > -tso -lr > > o" > > > > /Eric > > > > I experienced the same problems shortly after upgrading to 7.0-PRE > After about a day and something of uptime my ssh shells began to drop > with messages about corrupted/mismatched checksums. > I "fixed" the problem by putting an em(4) interface in the machine, > because I need it to be online and accessible remotely at all times. > There had been several bus_dma(9) related bugs in re(4) for a long time and I guess I fixed most of them. Hiding actual bugs by replacing interfaces is not a good way to fix root cause of the issue. If you can reproduce above issues in HEAD please let me know. -- Regards, Pyun YongHyeon
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