Date: Mon, 03 Mar 2008 21:30:38 +0100 From: Arnaud Houdelette <arnaud.houdelette@tzim.net> To: pyunyh@gmail.com Cc: freebsd-stable@freebsd.org Subject: Re: IP header checksum missing with Realtek 8168, jumbo frames and offloading. Message-ID: <47CC5FEE.7040005@tzim.net> In-Reply-To: <47CBBF80.9010906@tzim.net> References: <47CB2DB3.5010707@tzim.net> <20080303004340.GA72895@cdnetworks.co.kr> <47CBBF80.9010906@tzim.net>
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Arnaud Houdelette wrote: > Pyun YongHyeon a écrit : >> On Sun, Mar 02, 2008 at 11:44:03PM +0100, Arnaud Houdelette wrote: >> > I encountered connectivity issues with an integrated Realtek 8168 >> on my > MSI motherboard after enabling jumbo frames on my other box. >> > Investigating the issue, I found that the packets with an ethernet >> frame > of length > 2048 get an IP header of 0x0000. >> > ping -s 3000 192.168.0.11 ==> fail (ethereal on the other box show >> the > 0x0000 checksum on IP header) >> > ping -s 2008 192.168.0.11 ==> fail >> > ping -s 2006 192.168.0.11 ==> succeed >> > > > re0: <RealTek 8168/8111B PCIe Gigabit Ethernet> port >> 0xd800-0xd8ff mem > 0xfeaff000-0xfeafffff irq 19 at device 0.0 on pci2 >> > re0: Using 2 MSI messages >> > miibus0: <MII bus> on re0 >> > rgephy0: <RTL8169S/8110S/8211B media interface> PHY 1 on miibus0 >> > rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, >> 1000baseT, > 1000baseT-FDX, auto >> > > > The interface re0 is configured with : >> > ifconfig inet 192.168.0.1/24 media auto mtu 7422 polling >> > ifconfig re0 -txcsum solves the issue. >> > > I tried to reproduce the issue with a Realtek 8169 (using re(4) >> too). I > couln't : checksum offloading works ok on this card. >> > Is this a known issue (or maybe a bug in the 8168) ? >> > >> There had been several re(4) instability issues on PCIe based >> controllers. Would you try the following patch and let me know the >> result? >> http://people.freebsd.org/~yongari/re/6.3R/re.busdma.patch >> >> If you use 7.0-RELEASE use the following one. >> http://people.freebsd.org/~yongari/re/7.0R/if_re.c >> http://people.freebsd.org/~yongari/re/7.0R/if_rlreg.h >> > Sorry, I forgot to precise that I run the amd64 7.0-RELEASE . > I got the patch and recompiled the kernel fine. I'll test this evening. I'm sorry, but the patch just get things worse. The IP header thing isn't solved. And I get corrupted or missing TCP fragments, on both 8168 and 8169 net interfaces (even with -txcsum). >> > I can provide some network capture if needed. In the meantime I >> swapped > the two cards as I don't need jumbo on one of them. >> > > Thanks >> > > Arnaud >> > >
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