An Architecture for Multi-Segment Pseudowire Emulation Edge-to-Edge
RFC 5659
Document | Type | RFC - Informational (October 2009; Errata) | |
---|---|---|---|
Authors | Stewart Bryant , Matthew Bocci | ||
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 5659 (Informational) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ralph Droms | ||
Send notices to | david.sinicrope@ericsson.com |
Network Working Group M. Bocci Request for Comments: 5659 Alcatel-Lucent Category: Informational S. Bryant Cisco Systems October 2009 An Architecture for Multi-Segment Pseudowire Emulation Edge-to-Edge Abstract This document describes an architecture for extending pseudowire emulation across multiple packet switched network (PSN) segments. Scenarios are discussed where each segment of a given edge-to-edge emulated service spans a different provider's PSN, as are other scenarios where the emulated service originates and terminates on the same provider's PSN, but may pass through several PSN tunnel segments in that PSN. It presents an architectural framework for such multi- segment pseudowires, defines terminology, and specifies the various protocol elements and their functions. 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 and License Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the BSD License. Bocci & Bryant Informational [Page 1] RFC 5659 Multi-Segment PWE3 Architecture October 2009 Table of Contents 1. Introduction ....................................................3 1.1. Motivation and Context .....................................3 1.2. Non-Goals of This Document .................................6 1.3. Terminology ................................................6 2. Applicability ...................................................8 3. Protocol Layering Model .........................................8 3.1. Domain of MS-PW Solutions ..................................9 3.2. Payload Types ..............................................9 4. Multi-Segment Pseudowire Reference Model ........................9 4.1. Intra-Provider Connectivity Architecture ..................11 4.1.1. Intra-Provider Switching Using ACs .................11 4.1.2. Intra-Provider Switching Using PWs .................11 4.2. Inter-Provider Connectivity Architecture ..................11 4.2.1. Inter-Provider Switching Using ACs .................12 4.2.2. Inter-Provider Switching Using PWs .................12 5. PE Reference Model .............................................13 5.1. Pseudowire Pre-Processing .................................13 5.1.1. Forwarding .........................................13 5.1.2. Native Service Processing ..........................14 6. Protocol Stack Reference Model .................................14 7. Maintenance Reference Model ....................................15 8. PW Demultiplexer Layer and PSN Requirements ....................16 8.1. Multiplexing ..............................................16 8.2. Fragmentation .............................................17 9. Control Plane ..................................................17 9.1. Setup and Placement of MS-PWs .............................17 9.2. Pseudowire Up/Down Notification ...........................18 9.3. Misconnection and Payload Type Mismatch ...................18 10. Management and Monitoring .....................................18 11. Congestion Considerations .....................................19 12. Security Considerations .......................................20 13. Acknowledgments ...............................................23 14. References ....................................................23 14.1. Normative References .....................................23 14.2. Informative References ...................................23 Bocci & Bryant Informational [Page 2] RFC 5659 Multi-Segment PWE3 Architecture October 2009 1. Introduction RFC 3985 [1] defines the architecture for pseudowires, where a pseudowire (PW) both originates and terminates on the edge of the same packet switched network (PSN). The PW label is unchangedShow full document text