Re: [RRG] Long term clean-slate only for the RRG?

[jnc@mercury.lcs.mit.edu (Noel Chiappa)]

    > From: Dino Farinacci <dino@cisco.com>

    >> I can't see anyway around the location-identity-separation +
    >> unmodified-hosts --> network-sized-mapping-database problem. Or is ..
    >> there's some clever solution I have missed?

    > just want to make sure you are not implying some other subtle point.

No, no, just what it says: if we want to have both i) separation of location
and identity, and ii) unmodified hosts, then we necessarily have to have a
network-sized mapping database.

My point was that, if my thinking is correct (and if it's not, can someone
please point out where I've gone wrong), it's not reasonable to
simultaneously say 'I want location/identity separation' and also say 'I
don't want to change existing host software' and 'I think a big mapping
database is not feasible'. If you want the first, one of the next two _has_
to give; the only question is _which_.

I phrase it in high-level terms, not in terms of any particular proposal, to
make clear that it seems to me to be a fundamental limitation. If I am
confused, can someone please straighten me out!

If not, then I think it would be interested to have people hum on i) do we
want location/identity separation, and, if 'yes', ii) do we a) change hosts,
or b) accept the need for a network-sized mapping database - making clear, at
the time we ask i), that it implies having to make a choice at ii).


    > I think the RRG has only focused on loc/id split and really hasn't gone
    > into greater depth with other routing architectures.

Ah, I don't consider the location/identity split a 'routing architecture'.
It's an ancillary aspect of the overall system architecture, one which has at
best some influence on particular desired operational goals having to do with
routing (e.g. provider independence).

To me, routing architectures are about things like 'what entity choses the
path the packets flow along', and 'how are those paths computed', 'what data
does that computation need', 'how is that data distributed', etc.
network-sized-mapping-database.

	Noel

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