Administratively Scoped IP Multicast

Abstract

This document defines the "administratively scoped IPv4 multicast space" to be the range 239.0.0.0 to 239.255.255.255. In addition, it describes a simple set of semantics for the implementation of Administratively Scoped IP Multicast. Finally, it provides a mapping between the IPv6 multicast address classes [RFC1884] and IPv4 multicast address classes. This memo is a product of the MBONE Deployment Working Group (MBONED) in the Operations and Management Area of the Internet Engineering Task Force. Submit comments to <mboned@ns.uoregon.edu> or the author. 2. Acknowledgments Much of this memo is taken from "Administratively Scoped IP Multicast", Van Jacobson and Steve Deering, presented at the 30th IETF, Toronto, Canada, 25 July 1994. Steve Casner, Mark Handley and Dave Thaler have also provided insightful comments on earlier versions of this document.

Service Location Protocol, Version 2

“…SLP Requests messages are multicast to The Administratively Scoped SLP Multicast [17] address, which is 239.255.255.253. The default TTL to use for multicast is 255.…”

Service Location Protocol Modifications for IPv6

“…The textual representation defined for literal IPv6 addresses in [9] SLPv2 for IPv4 specifies only one multicast address, relative to an Administratively Scoped Address range [11]. The reason only one address was used is that there are only 256 relative assignments available for this purpose.…”

Multicast Address Dynamic Client Allocation Protocol (MADCAP)

“…This technique has several disadvantages in comparison to administratively scoped multicast addresses (as described in [3]), but it is currently in widespread usage.…”