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Re: [RRG] LISP and IP Interworking
I don't disagree with anything below. My concern is that
in the long term, we might see a swamp appearing in the
LISP-based DFZ, just as we've seen a swamp appearing in the
pure-BGP-based DFZ in the past (and as the large scale usage
of IPv6 "PI" prefixes would cause in the pure-BGP4+-based
IPv6 DFZ). So I'm suggesting, somewhat clumsily, that we
need to design things in a way that would allow us to recurse
the whole model if and when a swamp appears. Conceptually,
I find that easier to think about in terms of multiple DFZs.
I could be quite wrong, of course.
I don't see why we can't "recurse one more time". The main LISP spec
indicates that after prepending a header for Loc/ID split purposes,
you can prepend one more the TE-ITR to TE-ETR purposes. So if the
first Loc/ID split infrastructure runs level-0 LISP-ALT, the TE-based
infrastructure can run, another LISP-ALT at level-1. Where the BGP-
core today, level-0, and level-1 never connect to each other.
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