[Nsi-wg] Topology Exchange proposals (was: NSI Identifier format)

[Freek Dijkstra]

On 22-01-2014 23:13, John MacAuley wrote:

> It looks like your proposal for STP resolution is based on an
> external lookup service instead of a parsable URN.

That is correct.

> Do we think it wise to bring in a global lookup service to just
> resolve an STP to a network?

That's indeed the question.

So far I made two premises:

1. Identifiers should not change.
  Otherwise the 'isAlias' connection between domains is not going
  to work.

2. STP (and perhaps other resources) may migrate from one Topology to
another.
  See the two use case in my previous email [*]

>From this I reasoned that we need a lookup service (though 'global' can
still mean distributed or delegated, just like DNS and Handle).

If you can convince me that either one of my premises is wrong, or that
there are other solutions that can cope with these requirements, please do.

I think the reasoning by Henrik is that premise #2 is wrong.

What do you think?

Regards,
Freek

[*]
* NORDUnet: split one network in two (e.g. NORDUnet-West and
  NORDUnet-East)
* SURFnet: move a port from the testbed to the production network

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Freek Dijkstra
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