nanog mailing list archives

Re: MTU to CDN's


From: Dovid Bender <dovid () telecurve com>
Date: Thu, 18 Jan 2018 15:21:53 -0500

Vincent,

Thanks. That URL explained a lot.

On Tue, Jan 9, 2018 at 3:11 AM, Vincent Bernat <bernat () luffy cx> wrote:

 ❦  8 janvier 2018 15:08 -0800, joel jaeggli <joelja () bogus com> :

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.
PMTUD has a lot of trouble working reliability when the destination of
the PTB  is a stateless load-balancer.

More explanations are available here:
 https://blog.cloudflare.com/path-mtu-discovery-in-practice/
--
Don't comment bad code - rewrite it.
            - The Elements of Programming Style (Kernighan & Plauger)



Current thread: