Date: Wed, 24 Mar 1999 11:14:20 -0800 (PST) From: John Polstra <jdp@polstra.com> To: Archie Cobbs <archie@whistle.com> Cc: hackers@FreeBSD.ORG Subject: Re: Will IPFW pass GRE packets? Message-ID: <XFMail.990324111420.jdp@polstra.com> In-Reply-To: <199903241902.LAA92365@bubba.whistle.com>
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Archie Cobbs wrote: > Basically I agree with you, but it's agreement "in practice" > rather than "in theory". In other words, Microsoft (and Ascend, > 3Com, Copper Mountain, and ECI) may have done something that was > just plain stupid, but they didn't do anything that was a blatant > violation of any spec. Yep, I think we're in violent agreement. :-) I think what bugs me is that Microsoft didn't just leave the checksum as optional. They actually specified that it's not to be used. :-( > Moreover, while not perfect, IP error rates are still much lower > than 1990-era modem error rates were, etc. So they were probably > just lucky enough to get by on this one... BTW, there's an interesting little table on page 147 of Stevens Vol. 1 ("TCP/IP Illustrated") showing some actual measured error rates from around 1992. John --- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Self-interest is the aphrodisiac of belief." -- James V. DeLong To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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