[multipathtcp] Multipath TCP Address advertisement 5/5 - Communities

Fabien Duchêne <fabien.duchene@uclouvain.be> Sun, 06 November 2016 12:31 UTC

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From: Fabien Duchêne <fabien.duchene@uclouvain.be>
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Date: Sun, 06 Nov 2016 13:38:22 +0100
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Subject: [multipathtcp] Multipath TCP Address advertisement 5/5 - Communities
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As we agreed in Berlin during IETF96, here are a few email to discuss
the contributions proposed in

To allow a host to inform the receiving host about the diversity of
several addresses we propose to modify the ADD_ADDR to include 4 bits
describing a "Community" associated to this address.
The community values are an opaque field and it is expected that two
addresses having the same community share some resources.

With the community bits, a dual-stack host could elect to regroup all
the addresses attached to a single interface under the same community,
allowing the receiving host to decide on which advertised addresses it
wants to establish new subflows.
This is because in the case of a dual-stack host, establishing v4 and V6
is not always the best solution.
The idea here is to design a generic solution to regroup the address
that shares
the same forwarding type in a specific class.