Overview of IP Multicast in a Multi-Protocol Label Switching (MPLS) Environment
RFC 3353
Document | Type | RFC - Informational (August 2002; No errata) | |
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Authors | Bernard Sales , Frederic Griffoul , Wim Livens , Arup Acharya , Dirk Ooms , Furquan Ansari | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 3353 (Informational) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Scott Bradner | ||
IESG note | Responsible: RFC Editor | ||
Send notices to | (None) |
Network Working Group D. Ooms Request for Comments: 3353 Alcatel Category: Informational B. Sales Alcatel W. Livens Colt Telecom A. Acharya IBM F. Griffoul Ulticom F. Ansari Bell Labs August 2002 Overview of IP Multicast in a Multi-Protocol Label Switching (MPLS) Environment 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 (2002). All Rights Reserved. Abstract This document offers a framework for IP multicast deployment in an MPLS environment. Issues arising when MPLS techniques are applied to IP multicast are overviewed. The pros and cons of existing IP multicast routing protocols in the context of MPLS are described and the relation to the different trigger methods and label distribution modes are discussed. The consequences of various layer 2 (L2) technologies are listed. Both point-to-point and multi-access networks are considered. Ooms, et al. Informational [Page 1] RFC 3353 IP Multicast in an MPLS Environment August 2002 Table of Contents 1. Introduction ............................................. 3 2. Layer 2 Characteristics .................................. 4 3. Taxonomy of IP Multicast Routing Protocols in the Context of MPLS ................................... 5 3.1. Aggregation .............................................. 5 3.2. Flood & Prune ............................................ 5 3.3. Source/Shared Trees ...................................... 6 3.4. Co-existence of Source and Shared Trees .................. 7 3.5. Uni/Bi-directional Shared Trees .......................... 10 3.6. Encapsulated Multicast Data .............................. 11 3.7. Loop-free-ness ........................................... 11 3.8. Mapping of Characteristics on Existing Protocols ......... 11 4. Mixed L2/L3 Forwarding in a Single Node .................. 12 5. Taxonomy of IP Multicast LSP Triggers .................... 14 5.1. Request Driven ........................................... 14 5.1.1. General .................................................. 14 5.1.2. Multicast Routing Messages ............................... 15 5.1.3. Resource Reservation Messages ............................ 15 5.2. Topology Driven .......................................... 16 5.3. Traffic Driven ........................................... 16 5.3.1. General .................................................. 16 5.3.2. An Implementation Example ................................ 17 5.4. Combinations of Triggers and Label Distribution Modes .... 18 6. Piggy-backing ............................................ 18 7. Explicit Routing ......................................... 20 8. QoS/CoS .................................................. 20 8.1. DiffServ ................................................. 20 8.2. IntServ and RSVP ......................................... 21 9. Multi-access Networks .................................... 21 10. More Issues .............................................. 22 10.1. TTL Field ................................................ 22 10.2. Independent vs. Ordered Label Distribution Control ....... 23 10.3. Conservative vs. Liberal Label Retention Mode ............ 24 10.4. Downstream vs. Upstream Label Allocation ................. 25 10.5. Explicit vs. Implicit Label Distribution ................. 25 11. Security Considerations .................................. 26 12. Acknowledgements ......................................... 26 Informative References........................................... 27 Authors' Addresses .............................................. 28 Full Copyright Statement ........................................ 30 Ooms, et al. Informational [Page 2] RFC 3353 IP Multicast in an MPLS Environment August 2002Show full document text