Re: [RRG] Comments on draft-lewis-lisp-interworking

[Robin Whittle <rw@firstpr.com.au>]

Short version:     Agreeing with Joel and requesting the LISP team
                   write a unified account of LISP Proxy Tunnel
                   Routers, with detailed examples.

Hi Joel,

You wrote:

> But when it comes to deployment analysis, ignoring the question of who
> pays, and why, is just not going to work.  We don't need (don't want,
> and can't) to mandate a business model.  I would hope that a sensible
> recommendation allows for multiple business models.  But if we can not
> even imagine one that works, then it fails.

I entirely agree.

In the early brainstorming phases of development - as I regard the
RRG process at present - I think we need to explore all sorts of
wild ideas, without much regard to business models.

Maybe there is some combination of unlikely-sounding technical ideas
which have an unexpected synergy and solve a bunch of other
problems, leading to practical solutions which are novel, valuable
and practical - with possible business models.

When we are approaching the point where we start to take a technical
solution seriously - when we make it part of the basic architecture
and start working on other aspects of the system to build on it - we
need to have some tentative business models, or at least flag one
that has no viable model as badly in need of one.

I am about to post a message on Ivip's "Open ITRs in the DFZ" - the
ITRs previously known as "Anycast ITRs in the core/DFZ".  In that, I
discuss some important elaborations on the original concept, and
some business models for why these would be deployed.


It would be great if the LISP team did a comprehensive round-up of
everything they know about Proxy Tunnel Routers, and could post that
to the list with some examples to make it easy for other folks to
envisage how PTRs would work.  For instance:  Where are the PTRs?
Where are the various ETRs are for whatever EIDs prefixes each PTR
advertises.  Who runs these ETRs and who runs the PTR?  How each BGP
prefix a PTR advertises is comprised of one or more LISP EID
prefixes etc. and who are the end-users for these?  Also, which ISPs
have the one or more ETRs for each such EID prefix.


 - Robin         http://www.firstpr.com.au/ip/ivip/


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