Re: [OpenWrt-Devel] Seeing bad IP checksums on TCP connection w/ bridging

2012-01-02 Thread buddhay
On 02.01.2012 10:52, Philip Prindeville wrote: > On 1/1/12 5:01 AM, Gert Doering wrote: >> Hi, >> >> On Sat, Dec 31, 2011 at 08:00:07PM -0700, Philip Prindeville wrote: >>> So tcp isn't generating bad checksums... but tcpdump is seeing corrupt >>> packets. >> >> Hardware with TCP checksum offloadi

Re: [OpenWrt-Devel] Seeing bad IP checksums on TCP connection w/ bridging

2012-01-02 Thread Philip Prindeville
On 1/1/12 5:01 AM, Gert Doering wrote: > Hi, > > On Sat, Dec 31, 2011 at 08:00:07PM -0700, Philip Prindeville wrote: >> So tcp isn't generating bad checksums... but tcpdump is seeing corrupt >> packets. > > Hardware with TCP checksum offloading is known to cause this effect. > > gert The box i

Re: [OpenWrt-Devel] Seeing bad IP checksums on TCP connection w/ bridging

2012-01-01 Thread Gert Doering
Hi, On Sat, Dec 31, 2011 at 08:00:07PM -0700, Philip Prindeville wrote: > So tcp isn't generating bad checksums... but tcpdump is seeing corrupt > packets. Hardware with TCP checksum offloading is known to cause this effect. gert -- USENET is *not* the non-clickable part of WWW!

Re: [OpenWrt-Devel] Seeing bad IP checksums on TCP connection w/ bridging

2011-12-31 Thread Philip Prindeville
On 12/31/11 12:31 AM, Philip Prindeville wrote: > On 12/31/11 12:03 AM, Philip Prindeville wrote: >> I'm running 2.6.39.4 (svn checkout on or about 29617) and seeing: >> >> 23:47:37.749540 IP (tos 0x0, ttl 64, id 30955, offset 0, flags [DF], proto >> TCP (6), length 60) >> 192.168.1.25.60134 >

Re: [OpenWrt-Devel] Seeing bad IP checksums on TCP connection w/ bridging

2011-12-30 Thread Philip Prindeville
On 12/31/11 12:03 AM, Philip Prindeville wrote: > I'm running 2.6.39.4 (svn checkout on or about 29617) and seeing: > > 23:47:37.749540 IP (tos 0x0, ttl 64, id 30955, offset 0, flags [DF], proto > TCP (6), length 60) > 192.168.1.25.60134 > 192.168.1.253.49152: Flags [S], cksum 0xa8f3 > (corr