Date: Fri, 13 Jul 2007 10:28:51 -0700 From: Julian Elischer <julian@elischer.org> To: Bill Moran <wmoran@collaborativefusion.com> Cc: Stephen.Clark@seclark.us, Sten Daniel Soersdal <netslists@gmail.com>, freebsd-net@freebsd.org Subject: Re: 6.2 mtu now limits size of incomming packet Message-ID: <4697B653.8050906@elischer.org> In-Reply-To: <20070713130402.ed2f79ce.wmoran@collaborativefusion.com> References: <46967C5C.5040505@seclark.us> <469772DA.1000700@gmail.com> <46977741.8090301@seclark.us> <20070713093408.b8a92c23.wmoran@collaborativefusion.com> <4697A60C.4090409@seclark.us> <20070713130402.ed2f79ce.wmoran@collaborativefusion.com>
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Bill Moran wrote: ractices are > still evolving. > > Let's flip the question around a bit: why would you _want_ the TCP stack > to accept frames larger than the stated MTU? > Because mtu is mTu not mRu. The interface should theoretically always accept any packet up to the maximum practical size.. As the original BSD group always said.. (from my memories of Kirk's and Mike's talks in 1991), "Transmit strictly [according to the spec] but receive forgivingly". The ability to receive packets larger than mtu was not accidental. This should be fixed, if it is, as is suggested, a deliberate change.
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