Subject: Re: Allowing large PPPoE frames
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Manuel Bouyer <bouyer@antioche.eu.org>
List: tech-net
Date: 08/03/2003 20:33:36
On Sun, Aug 03, 2003 at 12:09:16PM -0400, der Mouse wrote:
> > The flaw in PPPoE is the small MTU (but it's hard to avoid in the
> > general case, given what PPPoE tries to do).
> 
> How is this a flaw?  The actual flaw is in all the idiotic software
> and/or configurations out there that blindly assume a 1500-octet MTU
> (like hosts configured to do PMTU-D from behind firewalls misconfigured
> to drop the ICMPs that drive PMTU-D).  If it weren't for such idiotic
> setups, it would be more like "1400, 1492, 1500, 1600, who cares, it's
> all about the same anyway".

In this specific case, it's that the MTU change at an equipement which
isn't IP but only a bridge.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 24 ans d'experience feront toujours la difference
--