Internet Exchanges supporting jumbo frames?

Mikael Abrahamsson swmike at
Thu Mar 10 16:22:34 UTC 2016

On Thu, 10 Mar 2016, Saku Ytti wrote:

> On 10 March 2016 at 02:44, Niels Bakker <niels=nanog at> 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 at

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