[188174] in North American Network Operators' Group
Re: Internet Exchanges supporting jumbo frames?
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Thu Mar 10 11:33:00 2016
X-Original-To: nanog@nanog.org
Date: Thu, 10 Mar 2016 17:22:34 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Saku Ytti <saku@ytti.fi>
In-Reply-To: <CAAeewD-7qQ28AxoSXnGEwP8xkXoUbBCNvvDZQppL1PviCKS5aQ@mail.gmail.com>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Thu, 10 Mar 2016, Saku Ytti wrote:
> On 10 March 2016 at 02:44, Niels Bakker <niels=nanog@bakker.net> wrote:
>> You're wrong here. The IXP switch platform cannot send ICMP Packet Too Big
>> messages. That's why everybody must agree on one MTU.
>
> I think what was meant, no global consensus is needed, each IXP can
> decide themselves what is edgeMTU and coreMTU VLAN MTU sizes in /this/
> IXP. Heck, have customers vote on webpage. I guess edgeMTU obviously
> will be 1500, coreMTU something else, 4470, 9000 and 9100 seem like
9180 (L3 MTU) is the obvious choice. All major core routing platforms
support it, and it's used in at least two "classic" L2 protocols (see my
earlier email).
--
Mikael Abrahamsson email: swmike@swm.pp.se
