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An Architecture for Inter-Domain Policy Routing (RFC1478)

IP.com Disclosure Number: IPCOM000002305D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 29 page(s) / 85K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Steenstrup: AUTHOR

Abstract

We present an architecture for inter-domain policy routing (IDPR). The objective of IDPR is to construct and maintain routes, between source and destination administrative domains, that provide user traffic with the requested services within the constraints stipulated for the domains transited. The IDPR architecture is designed to accommodate an internetwork containing tens of thousands of administrative domains with heterogeneous service requirements and restrictions.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group M. Steenstrup

Request for Comments: 1478 BBN Systems and Technologies

June 1993

An Architecture for Inter-Domain Policy Routing

Status of this Memo

This RFC specifies an IAB standards track protocol for the Internet

community, and requests discussion and suggestions for improvements.

Please refer to the current edition of the "IAB Official Protocol

Standards" for the standardization state and status of this protocol.

Distribution of this memo is unlimited.

Abstract

We present an architecture for inter-domain policy routing (IDPR).

The objective of IDPR is to construct and maintain routes, between

source and destination administrative domains, that provide user

traffic with the requested services within the constraints stipulated

for the domains transited. The IDPR architecture is designed to

accommodate an internetwork containing tens of thousands of

administrative domains with heterogeneous service requirements and

restrictions.

Contributors

The following people have contributed to the IDPR architecture: Bob

Braden, Lee Breslau, Ross Callon, Noel Chiappa, Dave Clark, Pat

Clark, Deborah Estrin, Marianne Lepp, Mike Little, Martha Steenstrup,

Zaw-Sing Su, Paul Tsuchiya, and Gene Tsudik. Yakov Rekhter supplied

many useful comments on a previous draft of this document.

Table of Contents

1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1. The Internet Environment. . . . . . . . . . . . . . . . . . . 4

2. Approaches to Policy Routing. . . . . . . . . . . . . . . . . . 5

2.1. Policy Route Generation . . . . . . . . . . . . . . . . . . . 5

2.1.1. Distance Vector Approach. . . . . . . . . . . . . . . . . . 5

2.1.2. Link State Approach . . . . . . . . . . . . . . . . . . . . 7

2.2. Routing Information Distribution. . . . . . . . . . . . . . . 8

2.2.1. Distance Vector Approach. . . . . . . . . . . . . . . . . . 8

2.2.2. Link State Approach . . . . . . . . . . . . . . . . . . . .10

2.3. Message Forwarding along Policy Routes. . . . . . . . . . . .10

2.3.1. Hop-by-Hop Approach . . . . . . . . . . . . . . . . . . . .11

2.3.1.1. A Clarification . . . . . . . . . . . . . . . . . . . . .11

2.3.2. Source Specified Approach . . . . . . . . . . . . . . . . .12

3. The IDPR Architecture . . . . . . . . . . . . . . . . . . . . .13

3.1. IDPR Functions. . . . . . . . . . . . . . . . . . . . . . . .13

3.2. IDPR Entities . . . . . . . . . . . . . . . . . . . . . . . .13

3.2.1. Path Agents . . . . . . . . . . . . . ...