Re: Internet Exchanges supporting jumbo frames?

[Niels Bakker <niels=nanog () bakker net>]

* nanog () nanog org (Kurt Kraut via NANOG) [Thu 10 Mar 2016, 00:59 CET]:
> I'm pretty confident there is no need for a specific MTU consensus 
> and not all IXP participants are obligated to raise their interface 
> MTU if the IXP starts allowing jumbo frames.

You're wrong here.  The IXP switch platform cannot send ICMP Packet 
Too Big messages.  That's why everybody must agree on one MTU.


> So we have Tier-1 backbones moving jumbo frames around continents, 
> why in a controlled L2 enviroment that usually resides in a single 
> building and managed by a single controller having jumbo frames is 
> that concerning?

Because the L3 devices connected to it aren't controlled by a single entity.


        -- Niels.