Internet Exchanges supporting jumbo frames?

Mikael Abrahamsson swmike at
Wed Mar 9 21:17:13 UTC 2016

On Wed, 9 Mar 2016, Nick Hilliard wrote:

> Many IXPs have either looked at or attempted to build jumbo peering 
> lans.  You can see how well they worked out by looking at the number of 
> successful deployments.  The reason for this tiny number isn't due to 
> lack of effort on the part of the ixp operators.

I believe all IXP operators should offer higher MTU vlans, so that the 
ISPs who are interested can use them. If individual ISPs are not 
interested, then they don't have to use it. It's available if they gain 

The whole point of an IX is to be a market place where interested parties 
can talk to each other. The IXP should not limit (to reasonable extent) 
what services the ISPs can run across the infrastructure. If two ISPs need 
higher than 1500 MTU between them, then forcing them to connect outside of 
the IXP L2 infrastructure doesn't make any sense to me, when it's fairly 
easy for the IXP to offer this service.

The IXPs who offer "private lans" between two parties, do they generally 
limit these as well to 1500 L3 MTU?

Mikael Abrahamsson    email: swmike at

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