Requirements for Pseudo-Wire Emulation Edge-to-Edge (PWE3)
RFC 3916
Document | Type | RFC - Informational (October 2004; No errata) | |
---|---|---|---|
Authors | Prayson Pate , Danny McPherson , XiPeng Xiao | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 3916 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jon Peterson | ||
Send notices to | <stbryant@cisco.com> |
Network Working Group X. Xiao, Ed. Request for Comments: 3916 Riverstone Networks Category: Informational D. McPherson, Ed. Arbor Networks P. Pate, Ed. Overture Networks September 2004 Requirements for Pseudo-Wire Emulation Edge-to-Edge (PWE3) 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 (2004). Abstract This document describes base requirements for the Pseudo-Wire Emulation Edge to Edge Working Group (PWE3 WG). It provides guidelines for other working group documents that will define mechanisms for providing pseudo-wire emulation of Ethernet, ATM, and Frame Relay. Requirements for pseudo-wire emulation of TDM (i.e., "synchronous bit streams at rates defined by ITU G.702") are defined in another document. It should be noted that the PWE3 WG standardizes mechanisms that can be used to provide PWE3 services, but not the services themselves. Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. What Are Pseudo Wires?. . . . . . . . . . . . . . . . . 2 1.2. Current Network Architecture. . . . . . . . . . . . . . 3 1.3. PWE3 as a Path to Convergence . . . . . . . . . . . . . 4 1.4. Suitable Applications for PWE3. . . . . . . . . . . . . 4 1.5. Summary . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Reference Model of PWE3 . . . . . . . . . . . . . . . . . . . 6 4. Packet Processing . . . . . . . . . . . . . . . . . . . . . . 7 4.1. Encapsulation . . . . . . . . . . . . . . . . . . . . . 7 4.2. Frame Ordering. . . . . . . . . . . . . . . . . . . . . 8 4.3. Frame Duplication . . . . . . . . . . . . . . . . . . . 8 4.4. Fragmentation . . . . . . . . . . . . . . . . . . . . . 8 Xiao, et al. Informational [Page 1] RFC 3916 PWE3 Requirements September 2004 4.5. Consideration of Per-PSN Packet Overhead. . . . . . . . 9 5. Maintenance of Emulated Services. . . . . . . . . . . . . . . 9 5.1. Setup and Teardown of Pseudo-Wires. . . . . . . . . . . 9 5.2. Handling Maintenance Message of the Native Services . . 10 5.3. PE-initiated Maintenance Messages . . . . . . . . . . . 10 6. Management of Emulated Services . . . . . . . . . . . . . . . 12 6.1. MIBs. . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2. General MIB Requirements. . . . . . . . . . . . . . . . 12 6.3. Configuration and Provisioning. . . . . . . . . . . . . 13 6.4. Performance Monitoring. . . . . . . . . . . . . . . . . 13 6.5. Fault Management and Notifications. . . . . . . . . . . 13 6.6. Pseudo-Wire Connection Verification and Traceroute. . . 13 7. Faithfulness of Emulated Services . . . . . . . . . . . . . . 13 7.1. Characteristics of an Emulated Service. . . . . . . . . 14 7.2. Service Quality of Emulated Services. . . . . . . . . . 14 8. Non-Requirements. . . . . . . . . . . . . . . . . . . . . . . 14 9. Quality of Service (QoS) Considerations . . . . . . . . . . . 15 10. Inter-domain Issues . . . . . . . . . . . . . . . . . . . . . 16 11. Security Considerations . . . . . . . . . . . . . . . . . . . 16 12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 17 13. References. . . . . . . . . . . . . . . . . . . . . . . . . . 17 13.1. Normative References. . . . . . . . . . . . . . . . . . 17 13.2. Informative References. . . . . . . . . . . . . . . . . 17 14. Authors' Addresses. . . . . . . . . . . . . . . . . . . . . . 18 15. Full Copyright Statement. . . . . . . . . . . . . . . . . . . 19 1. Introduction 1.1. What Are Pseudo Wires? Pseudo Wire Emulation Edge-to-Edge (PWE3) is a mechanism that emulates the essential attributes of a service such as ATM, Frame Relay or Ethernet over a Packet Switched Network (PSN). The required functions of PWs include encapsulating service-specific PDUs arriving at an ingress port, and carrying them across a path or tunnel, managing their timing and order, and any other operations required to emulate the behavior and characteristics of the service as faithfully as possible. From the customer perspective, the PW is perceived as an unshared link or circuit of the chosen service. However, there may beShow full document text