option 212 for 6RD

[Mikael Abrahamsson]

On Fri, 18 Jan 2013, Daniel Roesen wrote:

> How so? MTU is a property of a L2 domain, a "link". There is no such 
> thing as a "default route MTU" or a "prefix MTU" in RAs.

I disagree, at least when used with IPv6. My understanding is that if 
there are two routers on the link, each advertising its own /64 using RA, 
clients making GUA using SLAAC, I expect each of these /64 (and derived 
default route) to have different MTU even though they are in the same L2 
domain.

Do you disagree?

Would probably make a nice test case for implementers to use though. But 
it works currently, my ipv6 speakers at home use different ipv6 mtu and 
ipv4 mtu just based on the RAs.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se