[Nsi-wg] Protocol Message Path descriptions
jrv at internet2.edu
Mon Nov 16 12:39:32 CST 2009
This is a quick note to discuss path descriptions that might be received by a Provider Agent P1 when making a request.
1) simple path [A ->Z]
A and Z are ports on the network known to (or findable by) P1
2) Multi-hop path [A -> B -> C -> Q ->Z]
A, B, C, Q and Z are ports on the network know to (or findable by) P1
3) Strict -hop path [A -> B -> C -> D -> Z]
A, B, C, D, and Z are ports on the network known to (or findable by) P1
Comment - I am not sure there is a difference between 2 and 3. I started thinking 2 was loose hop, 3 was strict hop. Now I think they are the same as far as the requestor is concerned.
4) Mid-chain path [A *-> B* -> C -> Z]
A *-> B* -> C is outside the request but is included as part of the chain being requested
There may be other path descriptions for requests.
When responding to a request
1) simple path [ A<->Z]
2) multi-hop path [A <-> B <-> C <-> D <->Z]
3) Mid chain path [A*-> B *-> C <-> D <-> Z]
Finally, the times that one uses a path
1) request instantiation of a path that has been reserved
2) request timed [phase 1] scheduling of resource
3) request commited [phase 2] scheduling of resource
I don't know if there is a time for introducing this at the meeting Tuesday, but I submit this for possible discussion.
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