RE: The state of IPv6 multihoming development

["Michel Py" <michel@arneill-py.sacramento.ca.us>]

> Tony Hain wrote:
> Even if the origin node chooses an address that is
> overwritten by a border router, there is absolutely nothing
> he origin AS can do to enforce/influence the routing policy
> of the foreign network manager. As the packet gets closer,
> there might be an opportunity to create a localized gravity
> well, but only if there is no filtering going on between
> the providers. Since the origin network can't enforce reverse
> path routing decisions, the idea that the origin host is
> making any kind of routing decision is completely bogus. 

That being said, Craig has some legitimate traffic shaping concerns.
Even though the host might not make direct routing decisions, by
choosing either which of its own addresses it's going to use or which of
the destination's addresses it's going to use, the host itself takes a
traffic shaping decision, which is not something that Craig wants and I
support him on that. Add to this the extra overhead and headaches
associated with maintaining several addresses per host, it makes the
task impossible.

In short: a large organization needs to be able to engineer traffic,
which I don't realistically see happening when individual hosts can take
decisions that can affect traffic engineering.

Michel.