Aggregation of Resource ReSerVation Protocol (RSVP) Reservations over MPLS TE/DS-TE Tunnels
RFC 4804
Document | Type | RFC - Proposed Standard (February 2007; Errata) | |
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Author | François Le Faucheur | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4804 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Magnus Westerlund | ||
Send notices to | (None) |
Network Working Group F. Le Faucheur, Ed. Request for Comments: 4804 Cisco Systems, Inc. Category: Standards Track February 2007 Aggregation of Resource ReSerVation Protocol (RSVP) Reservations over MPLS TE/DS-TE Tunnels Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The IETF Trust (2007). Abstract RFC 3175 specifies aggregation of Resource ReSerVation Protocol (RSVP) end-to-end reservations over aggregate RSVP reservations. This document specifies aggregation of RSVP end-to-end reservations over MPLS Traffic Engineering (TE) tunnels or MPLS Diffserv-aware MPLS Traffic Engineering (DS-TE) tunnels. This approach is based on RFC 3175 and simply modifies the corresponding procedures for operations over MPLS TE tunnels instead of aggregate RSVP reservations. This approach can be used to achieve admission control of a very large number of flows in a scalable manner since the devices in the core of the network are unaware of the end-to-end RSVP reservations and are only aware of the MPLS TE tunnels. Faucheur Standards Track [Page 1] RFC 4804 RSVP Aggregation over MPLS TE Tunnels February 2007 Table of Contents 1. Introduction ....................................................3 2. Specification of Requirements ...................................7 3. Definitions .....................................................7 4. Operations of RSVP Aggregation over TE with Pre-established Tunnels .........................................8 4.1. Reference Model ............................................9 4.2. Receipt of E2E Path Message by the Aggregator ..............9 4.3. Handling of E2E Path Message by Transit LSRs ..............11 4.4. Receipt of E2E Path Message by the Deaggregator ...........11 4.5. Handling of E2E Resv Message by the Deaggregator ..........12 4.6. Handling of E2E Resv Message by the Aggregator ............12 4.7. Forwarding of E2E Traffic by the Aggregator ...............14 4.8. Removal of E2E Reservations ...............................14 4.9. Removal of the TE Tunnel ..................................14 4.10. Example Signaling Flow ...................................15 5. IPv4 and IPv6 Applicability ....................................16 6. E2E Reservations Applicability .................................16 7. Example Deployment Scenarios ...................................16 7.1. Voice and Video Reservations Scenario .....................16 7.2. PSTN/3G Voice Trunking Scenario ...........................17 8. Security Considerations ........................................18 9. Acknowledgments ................................................20 10. Normative References ..........................................20 11. Informative References ........................................21 Appendix A - Optional Use of RSVP Proxy on RSVP Aggregator ........23 Appendix B - Example Usage of RSVP Aggregation over DSTE Tunnels for VoIP Call Admission Control (CAC) ................25 Faucheur Standards Track [Page 2] RFC 4804 RSVP Aggregation over MPLS TE Tunnels February 2007 1. Introduction The Integrated Services (Intserv) [INT-SERV] architecture provides a means for the delivery of end-to-end Quality of Service (QoS) to applications over heterogeneous networks. [RSVP] defines the Resource reSerVation Protocol that can be used by applications to request resources from the network. The network responds by explicitly admitting or rejecting these RSVP requests. Certain applications that have quantifiable resource requirements express these requirements using Intserv parameters as defined in the appropriate Intserv service specifications ([GUARANTEED], [CONTROLLED]). The Differentiated Services (DiffServ) architecture ([DIFFSERV]) was then developed to support the differentiated treatment of packets in very large scale environments. In contrast to the per-flow orientation of Intserv and RSVP, Diffserv networks classify packets into one of a small number of aggregated flows or "classes", based on the Diffserv codepoint (DSCP) in the packet IP header. At each Diffserv router, packets are subjected to a "per-hop behavior" (PHB), which is invoked by the DSCP. The primary benefit of Diffserv is itsShow full document text