Signaling Requirements for Point-to-Multipoint Traffic-Engineered MPLS Label Switched Paths (LSPs)
RFC 4461
| Document | Type | RFC - Informational (April 2006; No errata) | |
|---|---|---|---|
| Author | Seisho Yasukawa | ||
| Last updated | 2018-12-20 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4461 (Informational) | |
| Action Holders |
(None)
|
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| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Alex Zinin | ||
| Send notices to | (None) | ||
Network Working Group S. Yasukawa, Ed.
Request for Comments: 4461 NTT
Category: Informational April 2006
Signaling Requirements for Point-to-Multipoint
Traffic-Engineered MPLS Label Switched Paths (LSPs)
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document presents a set of requirements for the establishment
and maintenance of Point-to-Multipoint (P2MP) Traffic-Engineered (TE)
Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs).
There is no intent to specify solution-specific details or
application-specific requirements in this document.
The requirements presented in this document not only apply to
packet-switched networks under the control of MPLS protocols, but
also encompass the requirements of Layer Two Switching (L2SC), Time
Division Multiplexing (TDM), lambda, and port switching networks
managed by Generalized MPLS (GMPLS) protocols. Protocol solutions
developed to meet the requirements set out in this document must
attempt to be equally applicable to MPLS and GMPLS.
Yasukawa Informational [Page 1]
RFC 4461 Signaling Requirements for P2MP TE MPLS LSPs April 2006
Table of Contents
1. Introduction ....................................................3
1.1. Non-Objectives .............................................6
2. Definitions .....................................................6
2.1. Acronyms ...................................................6
2.2. Terminology ................................................6
2.2.1. Terminology for Partial LSPs ........................8
2.3. Conventions ................................................9
3. Problem Statement ...............................................9
3.1. Motivation .................................................9
3.2. Requirements Overview ......................................9
4. Detailed Requirements for P2MP TE Extensions ...................11
4.1. P2MP LSP ..................................................11
4.2. P2MP Explicit Routing .....................................12
4.3. Explicit Path Loose Hops and Widely Scoped
Abstract Nodes ............................................13
4.4. P2MP TE LSP Establishment, Teardown, and
Modification Mechanisms ...................................14
4.5. Fragmentation .............................................14
4.6. Failure Reporting and Error Recovery ......................15
4.7. Record Route of P2MP TE LSP ...............................16
4.8. Call Admission Control (CAC) and QoS Control
Mechanism of P2MP TE LSPs .................................17
4.9. Variation of LSP Parameters ...............................17
4.10. Re-Optimization of P2MP TE LSPs ..........................18
4.11. Merging of Tree Branches .................................18
4.12. Data Duplication .........................................19
4.13. IPv4/IPv6 Support ........................................20
4.14. P2MP MPLS Label ..........................................20
4.15. Advertisement of P2MP Capability .........................20
4.16. Multi-Access LANs ........................................21
4.17. P2MP MPLS OAM ............................................21
4.18. Scalability ..............................................21
4.18.1. Absolute Limits ..................................22
4.19. Backwards Compatibility ..................................24
4.20. GMPLS ....................................................24
4.21. P2MP Crankback Routing ...................................25
5. Security Considerations ........................................25
6. Acknowledgements ...............................................26
7. References .....................................................26
7.1. Normative References ......................................26
7.2. Informative References ....................................26
Yasukawa Informational [Page 2]
RFC 4461 Signaling Requirements for P2MP TE MPLS LSPs April 2006
1. Introduction
Existing MPLS traffic engineering (MPLS-TE) allows for strict QoS
guarantees, resource optimization, and fast failure recovery, but it
is limited to point-to-point (P2P) LSPs. There is a desire to
support point-to-multipoint (P2MP) services using traffic-engineered
LSPs, and this clearly motivates enhancements of the base MPLS-TE
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