Hi Guy, all, On your slice 4 – chain model request, IMHO some comments are required. The diagram assumes simply e2e reservation request forwarding, while local reservation computations are performed in background, independently. It may be valid, but e.g. for AutoBAHN it’s false. This calculation is done before forwarding the reservation request. A results of this calculations (in the form of constraints, e.g. available VLANs range) is attached to forwarded request. This allows domains to improve their local reservation computation, taking into account predeceasing domains information. Also in case a domain has no resources for particular reservation, there is no need to forward the request. RSVP model (I would be glad if someone could confirm that) works also in similar way, expecting Network (or node) to validate resources, before forwarding the request to next Network element. I think we should consider both scenarios, despite of the decided final functionality. Best regards Radek -- ____________________________________________ Radoslaw Krzywania <mailto:radek.krzywania@man.poznan.pl> radek.krzywania@man.poznan.pl +48 61 858 20 28 Network Research and Development Department Poznan Supercomputing and Networking Center ____________________________________________ From: nsi-wg-bounces@ogf.org [mailto:nsi-wg-bounces@ogf.org] On Behalf Of Guy Roberts Sent: Tuesday, June 23, 2009 2:44 PM To: NSI WG Subject: [Nsi-wg] Multi-domain message sequence I have prepared an analysis of message flows for multi-domain reservations –see attached presentation. I think this raises some interesting questions (see issues section) which I would like to discuss in tomorrow’s call. Guy ---------------------------------------------------------------------------- -------------------------------------- Guy Roberts, Ph.D Network Engineering & Planning DANTE - www.dante.net <http://www.dante.net/> Tel: +44 (0)1223 371 316 City House, 126-130 Hills Road Cambridge, CB2 1PQ, UK ---------------------------------------------------------------------------- --------------------------------------