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MADCAP Multicast Scope Nesting State Option (RFC2907)

IP.com Disclosure Number: IPCOM000005089D
Original Publication Date: 2000-Sep-01
Included in the Prior Art Database: 2001-Aug-15
Document File: 14 page(s) / 28K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Kermode: AUTHOR

Abstract

This document defines a new option to the Multicast Address Dynamic Client Allocation Protocol (MADCAP) to support nested scoping. The new option's purpose is to allow clients to learn which scopes nest inside each other, and hence it may be used for expanding scope searches or hierarchical multicast transport.

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This is the abbreviated version, containing approximately 13% of the total text.

Network Working Group R. Kermode Request for Comments: 2907 Motorola Category: Standards Track September 2000

MADCAP Multicast Scope Nesting State Option

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2000). All Rights Reserved.

Abstract

This document defines a new option to the Multicast Address Dynamic Client Allocation Protocol (MADCAP) to support nested scoping. The new option's purpose is to allow clients to learn which scopes nest inside each other, and hence it may be used for expanding scope searches or hierarchical multicast transport.

Table of Contents

1. Introduction. . . . . . . . . . . . . . . . . . . . . 2 1.1 Time-To-Live (TTL) Scoping Split Horizon Effect. 2 1.2 Eliminating the Split Horizon Effect with

Administrative Scoping . . . . . . . . . . . . . 3

1.3 Terminology. . . . . . . . . . . . . . . . . . . 4 2. Multicast Nested Scoping State. . . . . . . . . . . . 5 3. Multicast Scope Nesting State Option. . . . . . . . . 5 3.1 Multicast Scope List Option . . . . . . . . . . 5 3.2 Representing the Multicast Scope Nesting State . 6

3.3 Multicast Scope Nesting State Option Usage . . . 7 4. Managing Dynamic Nested Scopes. . . . . . . . . . . . 8 4.1 MADCAP Server processing of MZAP messages. . . . 9 4.2 Updating State for Dynamic Nested Scopes due to

Timer Expiration . . . . . . . . . . . . . . 9 5. Multicast Scope Nesting State Option Format . . . . . 9 6. Constants . . . . . . . . . . . . . . . . . . . . . . 10 7. Security Considerations . . . . . . . . . . . . . . . 11 8. IANA Considerations . . . . . . . . . . . . . . . . . 11 9. Acknowledgements. . . . . . . . . . . . . . . . . . . 11

Kermode Standards Track [Page 1]

RFC 2907 MADCAP Multicast Scope Nesting State Option September 2000

10. References. . . . . . . . . . . . . . . . . . . . . . 11 11. Author's Address. . . . . . . . . . . . . . . . . . . 12 12. Full Copyright Statement. . . . . . . . . . . . . . . 13

1. Introduction

The Multicast Address Dynamic Client Allocation Protocol (MADCAP) [RFC2730] affords client applications the ability to request multicast address allocation services from multicast address allocation servers. As part of the Multicast Address Allocation Architecture [RFC2908], MADCAP gives clients the ability to reserve, request, and extend leases on multicast addresses.

A new MADCAP option, the "Multicast Scope Nesting State" option is proposed to allow clients to learn not only which scopes exist via the existing "Multicast Scope List" option, but how these scopes nest inside each other. This new option will also afford clients the ability to make better scope selections for a given session and also to construct hierar...