> ... These tend to argue for zone ids, not interface indexes
> (except for link-scoped where they're the same thing).
Implementations today use the same number space for interface indices and
link-scoped zone ids, but they are not necessarily the same thing. One could
number links separately from interfaces.
I'm warming up to Dave's proposal, but I would not invent new zone ids for
all the different multicast scope levels. (Or at least I'd leave this
optional for implementations.) I'd map the multicast scope levels into the
link-local/site-local/global unicast scopes.
Rich
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