North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: [NANOG] Microsoft.com PMTUD black hole?
On May 6, 2008, at 8:51 PM, Tomas L. Byrnes wrote: > Interestingly, Windows XP, Sp3, released today, describes changes in > PMTUD behavior. > > Black Hole Router detection is now on by default: > > http://download.microsoft.com/download/6/8/7/687484ed-8174-496d-8db9-f02 > b40c12982/Overview%20of%20Windows%20XP%20Service%20Pack%203.pdf > <http://download.microsoft.com/download/6/8/7/687484ed-8174-496d-8db9-f02b40c12982/Overview%20of%20Windows%20XP%20Service%20Pack%203.pdf > or http://tinyurl.com/323xb Regards > >> -----Original Message----- >> From: Robert Bonomi [mailto:[email protected]] >> Sent: Tuesday, May 06, 2008 3:54 PM >> To: [email protected] >> Subject: Re: [NANOG] Microsoft.com PMTUD black hole? >> >> ` >> >>> Date: Tue, 06 May 2008 14:29:03 -0700 >>> From: Nathan Anderson/FSR <[email protected]> >>> Subject: Re: [NANOG] Microsoft.com PMTUD black hole? >>> >>> >>> Now, although that makes sense, in order to avoid issues >> like the one >>> we are facing with Microsoft, would it not make _more_ >> sense for the >>> stack to look at the PMTU cache first, and then adjust its own MSS >>> just for connections to that one host? >> >> This _is_ Microsoft we're talking about, remember. 'sense' >> and 'Microsoft' >> are, at a =minimum= orthogonal to each other -- and may not >> even inhabit the same address-space. <wry grin> >> >> As for standards, it is official Microsoft policy to "embrace >> and extend", >> not to implement in a way compatible with the rest of the >> world. *sigh* >> >> I -don't- believe the rumor that "PMTUD/Vista Ultimate" sends >> incrementally increasing-size packets, and uses the first one >> that -doesn't- get through >> as the size limit. <giggle> >> >> >> >> _______________________________________________ >> NANOG mailing list >> [email protected] >> http://mailman.nanog.org/mailman/listinfo/nanog >> > > _______________________________________________ > NANOG mailing list > [email protected] > http://mailman.nanog.org/mailman/listinfo/nanog _______________________________________________ NANOG mailing list [email protected] http://mailman.nanog.org/mailman/listinfo/nanog
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