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IP over Optical Networks: A Framework
RFC 3717

Document type: RFC - Informational (March 2004; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3717 (Informational)
Responsible AD: Alex Zinin
Send notices to: <james_luciani@mindspring.com>, <awduche@isocore.com>

Network Working Group                                     B. Rajagopalan
Request for Comments: 3717                                    Consultant
Category: Informational                                       J. Luciani
                                                  Marconi Communications
                                                              D. Awduche
                                                                     MCI
                                                              March 2004

                 IP over Optical Networks: A Framework

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).  All Rights Reserved.

Abstract

   The Internet transport infrastructure is moving towards a model of
   high-speed routers interconnected by optical core networks.  The
   architectural choices for the interaction between IP and optical
   network layers, specifically, the routing and signaling aspects, are
   maturing.  At the same time, a consensus has emerged in the industry
   on utilizing IP-based protocols for the optical control plane.  This
   document defines a framework for IP over Optical networks,
   considering both the IP-based control plane for optical networks as
   well as IP-optical network interactions (together referred to as "IP
   over optical networks").

Rajagopalan, et al.          Informational                      [Page 1]
RFC 3717         IP over Optical Networks: A Framework        March 2004

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology and Concepts . . . . . . . . . . . . . . . . . . .  4
   3.  The Network Model. . . . . . . . . . . . . . . . . . . . . . .  8
       3.1.  Network Interconnection. . . . . . . . . . . . . . . . .  8
       3.2.  Control Structure. . . . . . . . . . . . . . . . . . . . 11
   4.  IP over Optical Service Models and Requirements. . . . . . . . 13
       4.1.  Domain Services Model. . . . . . . . . . . . . . . . . . 13
       4.2.  Unified Service Model. . . . . . . . . . . . . . . . . . 14
       4.3.  Which Service Model? . . . . . . . . . . . . . . . . . . 15
       4.4.  What are the Possible Services?. . . . . . . . . . . . . 16
   5.  IP transport over Optical Networks . . . . . . . . . . . . . . 16
       5.1.  Interconnection Models . . . . . . . . . . . . . . . . . 17
       5.2.  Routing Approaches . . . . . . . . . . . . . . . . . . . 18
       5.3.  Signaling-Related. . . . . . . . . . . . . . . . . . . . 21
       5.4.  End-to-End Protection Models . . . . . . . . . . . . . . 23
   6.  IP-based Optical Control Plane Issues. . . . . . . . . . . . . 25
       6.1.  Addressing . . . . . . . . . . . . . . . . . . . . . . . 25
       6.2.  Neighbor Discovery . . . . . . . . . . . . . . . . . . . 27
       6.3.  Topology Discovery . . . . . . . . . . . . . . . . . . . 28
       6.4.  Protection and Restoration Models. . . . . . . . . . . . 29
       6.5.  Route Computation. . . . . . . . . . . . . . . . . . . . 30
       6.6.  Signaling Issues . . . . . . . . . . . . . . . . . . . . 32
       6.7.  Optical Internetworking. . . . . . . . . . . . . . . . . 34
   7.  Other Issues . . . . . . . . . . . . . . . . . . . . . . . . . 35
       7.1.  WDM and TDM in the Same Network. . . . . . . . . . . . . 35
       7.2.  Wavelength Conversion. . . . . . . . . . . . . . . . . . 36
       7.3.  Service Provider Peering Points. . . . . . . . . . . . . 36
       7.4.  Rate of Lightpath Set-Up . . . . . . . . . . . . . . . . 36
       7.5.  Distributed vs. Centralized Provisioning . . . . . . . . 37
       7.6.  Optical Networks with Additional Configurable
             Components . . . . . . . . . . . . . . . . . . . . . . . 38
       7.7.  Optical Networks with Limited Wavelength Conversion
             Capability . . . . . . . . . . . . . . . . . . . . . . . 38
   8.  Evolution Path for IP over Optical Architecture. . . . . . . . 39
   9.  Security Considerations. . . . . . . . . . . . . . . . . . . . 41
       9.1.  General Security Aspects . . . . . . . . . . . . . . . . 42
       9.2.  Security Considerations for Protocol Mechanisms. . . . . 43
   10. Summary and Conclusions. . . . . . . . . . . . . . . . . . . . 44
   11. Informative References . . . . . . . . . . . . . . . . . . . . 44
   12. Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . 45
   13. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 46
   14. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 47
   15. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 48

Rajagopalan, et al.          Informational                      [Page 2]

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