An Architecture for Multi-Segment Pseudowire Emulation Edge-to-Edge
RFC 5659
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RFC - Informational
(October 2009; Errata)
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Last updated |
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2015-10-14
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IETF
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plain text
pdf
html
bibtex
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WG state
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(None)
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Document shepherd |
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No shepherd assigned
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IESG state |
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RFC 5659 (Informational)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Ralph Droms
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Send notices to |
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david.sinicrope@ericsson.com
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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
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