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Re: [NANOG] Microsoft.com PMTUD black hole?
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 > -----Original Message----- > From: Robert Bonomi [mailto:bonomi@xxxxxxxxxxxxxxxxx] > Sent: Tuesday, May 06, 2008 3:54 PM > To: nanog@xxxxxxxxx > Subject: Re: [NANOG] Microsoft.com PMTUD black hole? > > ` > > > Date: Tue, 06 May 2008 14:29:03 -0700 > > From: Nathan Anderson/FSR <nathana@xxxxxxx> > > 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 > NANOG@xxxxxxxxx > http://mailman.nanog.org/mailman/listinfo/nanog > _______________________________________________ NANOG mailing list NANOG@xxxxxxxxx http://mailman.nanog.org/mailman/listinfo/nanog