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Internet Multicast Addresses

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Internet Multicast Addresses (last updated 2007-10-31) Note: Host Extensions for IP Multicasting [RFC1112] specifies the extensions required of a host implementati on of the Internet Protocol (IP) to support multicasti ng. The multicast addre sses are in the range 224.0.0.0 through 239.255.255.255. Current addresses are listed below. The range of addresses between 224.0.0.0 and 224.0.0.255, inclusive, is reserved for the use of routing protocols and other low-level topology discovery or maintenance protocols, such as gateway discovery and group membership repor ting. Multicast router s should not forward any multicast datagram with destination addresses in this range, regardless of its TTL. Registry Name: IPv4 Multicast Addresses Reference: [RFC3171] Registration Procedure s: Expert Review, IESG Approval or Standards Actio n 224.0.0.0 - 224.0.0.255 (224.0.0/24) Local Network Control Block Date r egistered --------------- -------------- ------------------------------------- ------------ --- 224.0.0.0 Base Address (Reserved) [RFC1112,JBP] 224.0.0.1 All Systems on this Subnet [RFC1112,JBP] 224.0.0.2 All Routers on this Subnet [JBP] 224.0.0.3 Unassigned [JBP] 224.0.0.4 DVMRP Routers [RFC1075,JBP] 224.0.0.5 OSPFIGP OSPFIGP All Routers [RFC2328,JXM1] 224.0.0.6 OSPFI GP OSPFIGP Designated Routers [RFC2328,JXM1] 224.0.0.7 ST Routers [RFC1190,KS14] 224.0.0.8 ST Hosts [RFC1190,KS14] 224.0.0.9 RIP2 Routers [RFC1723,GSM11] 224.0.0.10 IGRP Routers [Farinacci] 224.0.0.11 Mobile-Agents [Bill Simpson] 224.0.0.12 DHCP Server / Relay Agent [RFC1884] 224.0.0.13 All PIM Routers [Farinacci] 224.0.0.14 RSVP-ENCAPSULATION 1.0 Introduction This document defines the initial assignment of IPv6 multicast addresses. It is based on the "IP Version 6 Addressi ng Architecture" [ADDARCH] and current IPv4 multicast address assignment found in <ftp://venera .isi.edu/in-notes/iana/ assignments/mul ticast-addresses >. It adapts the IPv4 assignments that are relevant to IPv6 assignments. IPv4 assignments that were not relevant were not converted into IPv6 assignments. Comments are sol icited on this c onversion. All other IPv6 multicast addresses are reserved.

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