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Extending the Number of Intermediate System to Intermediate System (IS-IS) Link State PDU (LSP) Fragments Beyond the 256 Limit (RFC3786)

IP.com Disclosure Number: IPCOM000028684D
Original Publication Date: 2004-May-01
Included in the Prior Art Database: 2004-May-27
Document File: 15 page(s) / 29K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Hermelin: AUTHOR [+3]

Abstract

This document describes a mechanism that allows a system to originate more than 256 Link State PDU (LSP) fragments, a limit set by the original Intermediate System to Intermediate System (IS-IS) Routing protocol, as described in ISO/IEC 10589. This mechanism can be used in IP-only, OSI-only, and dual routers.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 9% of the total text.

Network Working Group                                        A. Hermelin

Request for Comments: 3786                                 Montilio Inc.

Category: Informational                                       S. Previdi

                                                                M. Shand

                                                           Cisco Systems

                                                                May 2004

                        Extending the Number of

          Intermediate System to Intermediate System (IS-IS)

          Link State PDU (LSP) Fragments Beyond the 256 Limit

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

   This document describes a mechanism that allows a system to originate

   more than 256 Link State PDU (LSP) fragments, a limit set by the

   original Intermediate System to Intermediate System (IS-IS) Routing

   protocol, as described in ISO/IEC 10589.  This mechanism can be used

   in IP-only, OSI-only, and dual routers.

Table of Contents

   1.  Introduction .................................................  2

       1.1.  Keywords ...............................................  2

       1.2.  Definitions of Commonly Used Terms .....................  2

       1.3.  Operation Modes ........................................  3

       1.4.  Overview ...............................................  4

   2.  IS Alias ID TLV (IS-A) .......................................  5

   3.  Generating LSPs ..............................................  6

       3.1.  Both Operation Modes ...................................  6

       3.2.  Operation Mode 1 Additives .............................  8

   4.  Purging Extended LSP Fragments ............................... 10

   5.  Modifications to LSP handling in SPF ......................... 10

   6.  Forming Adjacencies .......................................... 11

   7.  Interoperating between extension-capable and non-capable ISs . 11

   8.  Security Considerations ...................................... 12

   9.  Acknowledgements ............................................. 12

Hermelin, et al.             Informational                      [Page 1]

RFC 3786                  IS-IS LSP Fragments                   May 2004

   10. References ....