[104352] in North American Network Operators' Group
Re: [NANOG] Microsoft.com PMTUD black hole?
daemon@ATHENA.MIT.EDU (Iljitsch van Beijnum)
Wed May 7 17:21:34 2008
From: Iljitsch van Beijnum <iljitsch@muada.com>
To: Nathan Anderson/FSR <nathana@fsr.com>
In-Reply-To: <48221A46.80708@fsr.com>
Date: Wed, 7 May 2008 23:19:59 +0200
Cc: nanog@merit.edu
Errors-To: nanog-bounces@nanog.org
On 7 mei 2008, at 23:08, Nathan Anderson/FSR wrote:
> How so? Iljitsch is suggesting that ICMP blockers originate packets
> without DF set if they are going to block the ICMP messages that PMTUD
> needs in order to work in the first place. That's what (I think) he
> means by "disabling path MTU discovery."
Yes.
> Also, for some reason, as I pointed out before, XP black hole router
> discovery doesn't seem to be working for me for whatever reason. Does
> anybody have any clue why that might be the case?
The problem is in the direction from M$ to you, so you can't fix that
from your end. I wonder if they've installed SP3 on their servers...
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