nanog mailing list archives

Re: MTU to CDN's


From: Jared Mauch <jared () puck Nether net>
Date: Mon, 8 Jan 2018 19:54:03 -0500

On Mon, Jan 08, 2018 at 05:55:55PM -0500, Dovid Bender wrote:
Hi,

N00b here trying to understand why certain CDN's such as Cloudfare have
issues where my MTU is low. For instance if I am using pptp and the MTU is
at 1300 it wont work. If I increase to 1478 it may or may not work.

        I've done some measurements over the internet in the past year or
so and 1400 byte packets with DF bit seem to make it just fine.

        - Jared

-- 
Jared Mauch  | pgp key available via finger from jared () puck nether net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.


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