Date: Thu, 16 Sep 2004 04:10:51 -0000 From: Max Laier <max@love2party.net> To: pf4freebsd@freelists.org Subject: [pf4freebsd] Re: Strange problem/Need help Message-ID: <200407310103.26700.max@love2party.net> In-Reply-To: <41036498.70705@raisdorf.net> References: <200407230602.34822.max@love2party.net> <41036498.70705@raisdorf.net>
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[-- Attachment #1 --] On Sunday 25 July 2004 09:43, Hendrik Scholz wrote: > Hi! > > Max Laier wrote: > > It turned out (after days of brainwracking debugging) that > > the problem went away by disabling the i386 optimized version of > > in4_cksum(). > > Did you take into account that certain network cards do checksums in > hardware? Yes, we do account for that. In fact I did commit an improvement to the way we handle RXSUM from Pyun just before Christian had this fall out so my first though was, that I might have broken something with that commit. Turned out that this was not the case. Christian told me that doing the GCC update fixed the issue, btw. So I impute the whole issue to a compiler bug/issue or broken build environment. > [0.27] hscholz@deimos:~ > ifconfig xl0 > xl0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 > options=9<RXCSUM,VLAN_MTU> > > bge(4) and other good 10/100 and Gbit cards do even more so if the > TXCSUM option is enabled bpf sees packets with broken checksums as these > are calculated by the NIC itself before sending. Even most of the xl(4) cards can do that, but due to broken hardware this is disabled since early this year. -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQBBCtO+XyyEoT62BG0RAsw8AJ45qSIv0sahd9pbTnGVeTZ3SjHy1ACfYRvu vM+zA01BwHiUF7vxJlY7GMU= =BMb7 -----END PGP SIGNATURE-----
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