Aggregation of Resource ReSerVation Protocol (RSVP) Reservations over MPLS TE/DS-TE Tunnels

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RFC 4804         RSVP Aggregation over MPLS TE Tunnels     February 2007


   [LSP-HIER] apply to the establishment/termination of the aggregate TE
   tunnels when this is triggered by GMPLS mechanisms (e.g., as a result
   of an end-to-end TE LSP establishment request received at the
   aggregation boundary).  As this document assumes pre-established
   tunnels, those aspects are not relevant here.  The signaling aspects
   discussed in Section 6.1 of [LSP-HIER] relate to the
   establishment/maintenance of the end-to-end TE LSPs over the
   aggregate TE tunnel.  This document describes how to use the same
   procedures as those specified in Section 6.1 of [LSP-HIER], but for
   the establishment of end-to-end RSVP reservations (instead of end-
   to-end TE LSPs) over the TE tunnels.  This is covered further in
   Section 4 of the present document.

   Pre-establishment of the TE tunnels may be triggered by any
   mechanisms including; for example, manual configuration or automatic
   establishment of a TE tunnel mesh through dynamic discovery of TE
   Mesh membership as allowed in [AUTOMESH].

   Procedures in the case of dynamically established TE tunnels are for
   further studies.

4.1.  Reference Model

      |----|                                          |----|
   H--| R  |\ |-----|                       |------| /| R  |--H
   H--|    |\\|     |       |---|           |      |//|    |--H
      |----| \| He/ |       | T |           | Te/  |/ |----|
              | Agg |=======================| Deag |
             /|     |       |   |           |      |\
   H--------//|     |       |---|           |      |\\--------H
   H--------/ |-----|                       |------| \--------H


   H       = Host requesting end-to-end RSVP reservations
   R       = RSVP router
   He/Agg  = TE tunnel Head-end/Aggregator
   Te/Deag = TE tunnel Tail-end/Deaggregator
   T       = Transit LSR

   --    = E2E RSVP reservation
   ==    = TE tunnel

4.2.  Receipt of E2E Path Message by the Aggregator

   The first event is the arrival of the E2E Path message at the
   Aggregator.  The Aggregator MUST follow traditional RSVP procedures
   for the processing of this E2E path message augmented with the
   extensions documented in this section.



Faucheur                    Standards Track                     [Page 9]