Date: Tue, 6 Apr 2004 09:52:13 +0100 From: Tim Hawkins <tim@contentspace.demon.co.uk> To: freebsd-questions@freebsd.org Subject: Re: bad tcp/udp checksums with broadcom cards. Message-ID: <200404060952.13548.tim@contentspace.demon.co.uk> In-Reply-To: <Pine.LNX.4.33.0404051549070.3737-100000@ux1.ibb.net> References: <Pine.LNX.4.33.0404051549070.3737-100000@ux1.ibb.net>
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On Monday 05 April 2004 14:52, Mipam wrote: Im getting the same problem with my Intel 82544XT PRO/1000 MT Gigabit Ethernet Controller. (Dell 600SC server, onboard card) 04:38:19.775211 bsd02.contentspace.priv.49179 > cs02.contentspace.priv.domain: [bad udp cksum 5732!] 4740+ PTR? 250.255.255.239.in-addr.arpa. (46) (ttl 64, id 1175, len 74) 04:38:19.775777 cs02.contentspace.priv.3566 > router.contentspace.priv.domain: 7535+ [1au] PTR? 250.255.255.239.in-addr.arpa. (57) (ttl 128, id 5152, len 85) 04:38:19.793141 router.contentspace.priv.domain > cs02.contentspace.priv.3566: 7535 NXDomain 0/1/1 (114) (ttl 254, id 17321, len 142) 04:38:19.793514 cs02.contentspace.priv.domain > bsd02.contentspace.priv.49179: 4740 NXDomain 0/1/0 (103) (ttl 128, id 5153, len 131) 04:38:19.793897 bsd02.contentspace.priv.49180 > cs02.contentspace.priv.domain: [bad udp cksum 9361!] 4741+ PTR? 166.0.168.192.in-addr.arpa. (44) (ttl 64, id 1176, len 7 2) 04:38:19.794393 cs02.contentspace.priv.domain > bsd02.contentspace.priv.49180: 4741* 1/0/0 166.0.168.192.in-addr.arpa. (67) (ttl 128, id 5154, len 95) 04:38:19.794913 bsd02.contentspace.priv.49181 > cs02.contentspace.priv.domain: [bad udp cksum 57d9!] 4742+ PTR? 129.14.0.193.in-addr.arpa. (43) (ttl 64, id 1177, len 71 ) > Hi, > > (I allready posted this message without a subject, which isnt nice so i > post it again, forgive me). > > I've some dell poweredges with broadcomcards in them: > > bge0: <Broadcom BCM5704C Dual Gigabit Ethernet, ASIC rev. 0x2002> mem > 0xfcd20000 > -0xfcd2ffff,0xfcd30000-0xfcd3ffff irq 16 at device 0.0 on pci2 > bge0: Ethernet address: 00:0b:db:93:c5:c4 > miibus0: <MII bus> on bge0 > brgphy0: <BCM5704 10/100/1000baseTX PHY> on miibus0 > brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, > 1000baseTX-FDX, auto > > However on all of these systems i encounter this in tcpdump: > > 14:51:49.845 x.x.x.x.22 > x.x.x.x.3599: P 444:784(340) ack > 53 win 32850 (DF) [tos 0x10] (ttl 64, id 21535, len 380, bad cksum 0!) > 14:51:49.863740 x.x.x.x.3599 > x.x.x.x.22: P 53:105(52) ack 280 > win 64128 (ttl 126, id 24085, len 92) > 14:51:49.864327 x.x.x.x.3599 > x.x.x.x.22: . [tcp sum ok] > 105:105(0) ack 784 win 63624 (ttl 126, id 24086, len 40) > 14:51:49.865208 x.x.x.x.3599 > x.x.x.x.22: P 105:157(52) ack > 784 win 63624 (ttl 126, id 24088, len 92) > 14:51:49.865231 x.x.x.x.22 > x.x.x.x.3599: . [bad tcp cksum > 505b!] 784:784(0) ack 157 win 32824 (DF) [tos 0x10] (ttl 64, id 21536, > len 40, bad cksum 0!) > > Has this to do with tcp checksum offloading? > Should i turn it off? And if so, how to turn it off? > Or is this correct and no problem? > Does this card got segmentation offload and other offloads? > Any hints? > Bye, > > Mipam. > > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org"
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