[137517] in North American Network Operators' Group
Re: NIST and SP800-119
daemon@ATHENA.MIT.EDU (William Herrin)
Tue Feb 15 10:37:23 2011
In-Reply-To: <0DCE3E24-A879-41DC-958D-99BC5DD57784@hopcount.ca>
From: William Herrin <bill@herrin.us>
Date: Tue, 15 Feb 2011 10:36:54 -0500
To: Joe Abley <jabley@hopcount.ca>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Feb 15, 2011 at 10:09 AM, Joe Abley <jabley@hopcount.ca> wrote:
> On 2011-02-14, at 21:41, William Herrin wrote:
>> On Mon, Feb 14, 2011 at 7:24 PM, TR Shaw <tshaw@oitc.com> wrote:
>>> Just wondering what this community thinks of NIST in
>>> general and their SP800-119 (
>>> http://csrc.nist.gov/publications/nistpubs/800-119/sp800-119.pdf )
>>> writeup about IPv6 in particular.
>>
>> Well, according to this document IPv4 path MTU discovery is,
>> "optional, not widely used."
>
> Optional seems right. Have there been any recent studies on how widely pM=
TUd is actually used in v4?
Hi Joe,
Are you aware of a TCP implementation in an OS that shipped within the
last decade but doesn't enable IPv4 pMTUd by default? Each version of
Windows and all the major unixes use it on every TCP connection unless
you explicitly turn it off.
Regards,
Bill
--=20
William D. Herrin ................ herrin@dirtside.com=A0 bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
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