Date: Tue, 9 Jan 2001 13:04:39 -0600 From: David Kelly <dkelly@hiwaay.net> To: "Jeroen C. van Gelderen" <jeroen@vangelderen.org> Cc: Jonathan Lemon <jlemon@flugsvamp.com>, stable@FreeBSD.ORG Subject: Re: Intel PRO/100+ driver or hardware? (Update) Message-ID: <20010109130439.A48418@grumpy.dyndns.org> In-Reply-To: <89010000.979063602@grolsch.ai>; from jeroen@vangelderen.org on Tue, Jan 09, 2001 at 02:06:42PM -0400 References: <200101081521.f08FLDi31948@prism.flugsvamp.com> <89010000.979063602@grolsch.ai>
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On Tue, Jan 09, 2001 at 02:06:42PM -0400, Jeroen C. van Gelderen wrote: > --On Monday, January 08, 2001 09:21:13 -0600 Jonathan Lemon > <jlemon@flugsvamp.com> wrote: > [...] > > It looks like 'hayek' is refusing to accept one of the segments that > > 'keynes' is transmitting. The segment arrives at the machine, but > > 'hayek' never sends an ACK. > > > > I'd look at 'netstat -s' and see whether any of the 'bad checksum' > > counters are set, if so, then something is corrupting the packets. > > Just the flag I needed :-) As soon as the connection stalls, the > bad-checksum counter goes trough the roof. And *every* re-transmitted > packet seems to have a bad checksum as well. > > The hub is not busy at the moment I tried and none of the other TCP > connections to and from this box are affected when this occurs. It seems > that packets with certain content get mangled so that retransmits will > never solve the problem. OK, that seems to be part of the key. You have hit on a data pattern which will not make it thru some part of the link. Not an unheard of situation. Often an impedance mismatch where the pattern resonates and "rings" an extra bit out of place. Hard to say if the problem is the hub or the Intel card. But seemingly the combination. Changing either to a different model and/or brand solves the problem? Any chance you can capture and/or share the problem data? -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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