Date: Mon, 28 May 2007 17:23:04 -0700 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Andre Oppermann <andre@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Segment failed SYNCOOKIE? Message-ID: <20070529002304.GA90534@troutmask.apl.washington.edu> In-Reply-To: <465AF5C6.2010302@freebsd.org> References: <20070525234115.GA48789@troutmask.apl.washington.edu> <465AF5C6.2010302@freebsd.org>
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On Mon, May 28, 2007 at 05:31:18PM +0200, Andre Oppermann wrote: > Steve Kargl wrote: > >Anyone have ideas on how to cure > > > >May 25 16:20:03 node13 kernel: TCP: [192.168.0.15]:53815 to > >[192.168.0.13]:50992 tcpflags 0x11<FIN,ACK>; syncache_expand: > >Segment failed SYNCOOKIE authentication > > > >The hardware and kernel on 192.168.0.15 and 192.168.0.13 > >are identical. > > Do you have any daemon listening on [192.168.0.13]:50992? > I've set "net.inet.tcp.syncookies=0" in /boot/loader.conf to disable syncookies. I'm now seeing > May 28 16:39:59 node13 kernel: bge0: watchdog timeout -- resetting > May 28 16:39:59 node13 kernel: bge0: link state changed to DOWN > May 28 16:40:02 node13 kernel: bge0: link state changed to UP > May 28 16:41:51 node13 kernel: TCP: [192.168.0.13]:62460 to > [192.168.0.13]:56460 tcpflags 0x10<ACK>; syncache_expand: Spurious ACK > May 28 16:41:51 node13 kernel: TCP: [192.168.0.13]:64274 to > [192.168.0.13]:49985 tcpflags 0x10<ACK>; syncache_expand: Spurious ACK > May 28 16:41:51 node13 kernel: TCP: [192.168.0.11]:51473 to > [192.168.0.13]:57885 tcpflags 0x11<FIN,ACK>; syncache_expand: Spurious ACK > May 28 16:41:51 node13 kernel: TCP: [192.168.0.12]:49393 to > [192.168.0.13]:57885 tcpflags 0x10<ACK>; syncache_expand: Spurious ACK > May 28 16:41:51 node13 kernel: TCP: [192.168.0.12]:61494 to > [192.168.0.13]:52887 tcpflags 0x10<ACK>; syncache_expand: Spurious ACK > May 28 16:41:51 node13 kernel: TCP: [192.168.0.12]:63379 to > [192.168.0.13]:63472 tcpflags 0x10<ACK>; syncache_expand: Spurious ACK This is occurring with an openmpi application. -- Steve
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