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Re: Tunnel MTU
On 28 jul 2009, at 19:44, Mark Townsley wrote:
I'd like to clarify of course that some of the MTU issues we
discussed were not specific to tunneling, but to mismatched MTUs on
a home LAN vs. WAN interface in general.
In IPv6 you can easily broadcast your WAN MTU in RAs on the LAN. So if
your WAN has 1337 you simply have an MTU option with "1337" in RAs
that are sent out on the LAN side.
The extra 20 bytes of a 6rd or 6to4
With 6to4 most implementations simply use 1280.
encapsulation isn't significant when trying to solve support of 9K
jumbo frames and standard 1500 byte ethernet MTUs in the same network.
I have an expired draft that solves exactly that issue:
http://tools.ietf.org/html/draft-van-beijnum-multi-mtu-02
I intend to bring it back to life in a much improved incarnation at
some point, didn't get that done before this meeting.