Dismiss
The IQ application will be briefly unavailable on Sunday, March 31st, starting at 10:00am ET. Access will be restored as quickly as possible.
Browse Prior Art Database

BGP OSPF Interaction (RFC1403)

IP.com Disclosure Number: IPCOM000002228D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2019-Feb-10
Document File: 17 page(s) / 20K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Varadhan: AUTHOR

Related Documents

10.17487/RFC1403: DOI

Abstract

This memo defines the various criteria to be used when designing an Autonomous System Border Routers (ASBR) that will run BGP with other ASBRs external to the AS and OSPF as its IGP. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 10% of the total text.

Network Working Group K. Varadhan Request for Comments: 1403 OARnet Obsoletes: 1364 January 1993

BGP OSPF Interaction

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

This memo defines the various criteria to be used when designing an Autonomous System Border Routers (ASBR) that will run BGP with other ASBRs external to the AS and OSPF as its IGP. This is a republication of RFC 1364 to correct some editorial problems.

Table of Contents

1. Introduction .................................................... 2 2. Route Exchange .................................................. 3 2.1. Exporting OSPF routes into BGP ................................ 3 2.2. Importing BGP routes into OSPF ................................ 4 3. BGP Identifier and OSPF router ID ............................... 5 4. Setting OSPF tags, BGP ORIGIN and AS_PATH attributes ............ 6 4.1. Semantics of the characteristics bits ......................... 8 4.2. Configuration parameters for setting the OSPF tag ............. 9 4.3. Manually configured tags ...................................... 10 4.4. Automatically generated tags .................................. 10 4.4.1. Routes with incomplete path information, PathLength = 0 ..... 10 4.4.2. Routes with incomplete path information, PathLength = 1 ..... 11 4.4.3. Routes with incomplete path information, PathLength >= 1 .... 11 4.4.4. Routes with complete path information, PathLength = 0 ....... 12 4.4.5. Routes with complete path information, PathLength = 1 ....... 12 4.4.6. Routes with complete path information, PathLength >= 1 ...... 13 4.5. Miscellaneous tag settings .................................... 13 4.6. Summary of the TagType field setting .......................... 14 5. Setting OSPF Forwarding Address and BGP NEXT_HOP attribute ...... 14 6. Security Considerations ......................................... 15 7. Acknowledgements ................................................ 15 8. Bibliography .................................................... 16 9. Author’s Address ................................................ 17

Varadhan [Page 1]

RFC 1403 BGP OSPF Interaction January 1993

1. Introduction

This document defines the various criteria to be used when designing an Autonomous System Border Routers (ASBR) that will run BGP [RFC1267] with other ASBRs external to the AS, and OSPF [RFC1247] as its IGP.

This document defines how the following fields in OSPF and attributes in BGP are to be set when interfacing between BGP and OSPF at an ASBR:

OSPF cost and type vs. BGP INTER-AS METRIC OSPF tag vs. BGP ORIGIN and AS_PATH OSPF Forwarding Address vs. BGP NEXT_HOP

For a more general treatise on routing and route exchange problems, p...

Processing...
Loading...