Internet Exchanges supporting jumbo frames?

Mikael Abrahamsson swmike at
Thu Mar 10 17:16:46 UTC 2016

On Thu, 10 Mar 2016, Tassos Chatzithomaoglou wrote:

> Mikael Abrahamsson wrote on 10/3/16 18:21:
>> However, I stand by my earlier statement that we need to include MTU/MRU in ND messages, so that this can be negotiated on a LAN where not all devices support large MTU.
> Isn't this already supported?

That is in RAs, and pertains to a prefix. Also, if a device can't use the 
advertised MTU, they will keep lower MTU which might be causing MTU 

For instance, if I announce 9000 as MTU and a device is bridged via wifi, 
wifi chips generally only supports around 2300 in MTU, so you'll have MTU 
mismatch with MTU blackholing within the same L2 network. This is bad.

Mikael Abrahamsson    email: swmike at

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