RFC 2776 (rfc2776) - Page 1 of 27

Multicast-Scope Zone Announcement Protocol (MZAP)

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Network Working Group                                         M. Handley
Request for Comments: 2776                                         ACIRI
Category: Standards Track                                      D. Thaler
                                                               Microsoft
                                                              R. Kermode
                                                                Motorola
                                                           February 2000


           Multicast-Scope Zone Announcement Protocol (MZAP)

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 protocol, the Multicast-Scope Zone
   Announcement Protocol (MZAP), for discovering the multicast
   administrative scope zones that are relevant at a particular
   location.  MZAP also provides mechanisms whereby common
   misconfigurations of administrative scope zones can be discovered.

Table of Contents

   1 Introduction ................................................  2
   2 Terminology .................................................  4
   3 Overview ....................................................  5
   3.1 Scope Nesting .............................................  6
   3.2 Other Messages ............................................  7
   3.3 Zone IDs ..................................................  7
   4 Detecting Router Misconfigurations ..........................  8
   4.1 Detecting non-convex scope zones ..........................  8
   4.2 Detecting leaky boundaries for non-local scopes ...........  9
   4.3 Detecting a leaky Local Scope zone ........................ 10
   4.4 Detecting conflicting scope zones ......................... 10
   5 Packet Formats .............................................. 11
   5.1 Zone Announcement Message ................................. 14
   5.2 Zone Limit Exceeded (ZLE) ................................. 15
   5.3 Zone Convexity Message .................................... 15



Handley, et al.             Standards Track
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