Internet Exchanges supporting jumbo frames?

[achatz at forthnet.gr (Tassos Chatzithomaoglou)]

Niels Bakker wrote on 10/3/16 02:44:
> * nanog at 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.
>
>
Isn't that the case for IXP's current/default MTU?
If an IXP currently uses 1500, what effect will it have to its customers if it's increased to 9200 but not announced to them?

--
Tassos