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IP over Optical Networks: A Framework (RFC3717)

IP.com Disclosure Number: IPCOM000022240D
Original Publication Date: 2004-Mar-01
Included in the Prior Art Database: 2004-Mar-02

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Rajagopalan: AUTHOR [+3]

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").

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 4% of the total text.

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 Lig...