Applicability Statement for Traffic Engineering with MPLS
RFC 3346
| Document | Type | RFC - Informational (August 2002; No errata) | |
|---|---|---|---|
| Authors | Blaine Christian , Dave Cooper , Alan Hannan , Vijay Gill , Daniel Awduche , Wai Lai , Jim Boyle | ||
| 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 3346 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Bert Wijnen | ||
| IESG note |
Approved Responsible: RFC Editor |
||
| Send notices to | (None) | ||
Network Working Group J. Boyle
Request for Comments: 3346 PD Nets
Category: Informational V. Gill
AOL Time Warner, Inc.
A. Hannan
RoutingLoop
D. Cooper
Global Crossing
D. Awduche
Movaz Networks
B. Christian
Worldcom
W.S. Lai
AT&T
August 2002
Applicability Statement for Traffic Engineering with MPLS
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 describes the applicability of Multiprotocol Label
Switching (MPLS) to traffic engineering in IP networks. Special
considerations for deployment of MPLS for traffic engineering in
operational contexts are discussed and the limitations of the MPLS
approach to traffic engineering are highlighted.
Boyle, et al. Informational [Page 1]
RFC 3346 Applicability Statement for Traffic Engineering August 2002
Table of Contents
1. Introduction....................................................2
2. Technical Overview of ISP Traffic Engineering...................3
3. Applicability of Internet Traffic Engineering...................4
3.1 Avoidance of Congested Resources................................4
3.2 Resource Utilization in Network Topologies with Parallel Links..5
3.3 Implementing Routing Policies using Affinities..................5
3.4 Re-optimization After Restoration...............................6
4. Implementation Considerations...................................6
4.1 Architectural and Operational Considerations....................6
4.2 Network Management Aspects......................................7
4.3 Capacity Engineering Aspects....................................8
4.4 Network Measurement Aspects.....................................8
5. Limitations.....................................................9
6. Conclusion.....................................................11
7. Security Considerations........................................11
8. References.....................................................11
9. Acknowledgments................................................12
10. Authors' Addresses.............................................13
11. Full Copyright Statement.......................................14
1. Introduction
It is generally acknowledged that one of the most significant initial
applications of Multiprotocol Label Switching (MPLS) is traffic
engineering (TE) [1][2] in IP networks. A significant community of
IP service providers have found that traffic engineering of their
networks can have tactical and strategic value [2, 3, 4]. To support
the traffic engineering application, extensions have been specified
for Interior Gateway Protocols (IGP) IS-IS [5] and OSPF [6], and to
signaling protocols RSVP [7] and LDP [8]. The extensions for IS-IS,
OSPF, and RSVP have all been developed and deployed in large scale in
many networks consisting of multi-vendor equipment.
This document discusses the applicability of TE to Internet service
provider networks, focusing on the MPLS-based approach. It augments
the existing protocol applicability statements and, in particular,
relates to the operational applicability of RSVP-TE [9]. Special
considerations for deployment of MPLS in operational contexts are
discussed and the limitations of this approach to traffic engineering
are highlighted.
Boyle, et al. Informational [Page 2]
RFC 3346 Applicability Statement for Traffic Engineering August 2002
2. Technical Overview of ISP Traffic Engineering
Traffic engineering (TE) is generally concerned with the performance
optimization of operational networks [2]. In contemporary practice,
TE means mapping IP traffic flows onto the existing physical network
topology in the most effective way to accomplish desired operational
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