[104323] in North American Network Operators' Group
Re: [NANOG] Microsoft.com PMTUD black hole?
daemon@ATHENA.MIT.EDU (Robert Bonomi)
Tue May 6 18:54:39 2008
Date: Tue, 6 May 2008 17:53:58 -0500 (CDT)
From: Robert Bonomi <bonomi@mail.r-bonomi.com>
To: nanog@merit.edu
Errors-To: nanog-bounces@nanog.org
`
> Date: Tue, 06 May 2008 14:29:03 -0700
> From: Nathan Anderson/FSR <nathana@fsr.com>
> 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>
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