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Multicast Addressing
draft-albanna-iana-ipv4-mcast-guidelines-01
http://www.iana.org/assignments/multicast-addresses
Examples of Reserved & Link-local Addresses
- 224.0.0.0 - 224.0.0.255 reserved & not forwarded
- 239.0.0.0 - 239.255.255.255 Administrative Scoping
- 224.0.0.1 - All local hosts
- 224.0.0.2 - All local routers
- 224.0.0.4 - DVMRP
- 224.0.0.5 - OSPF
- 224.0.0.6 - Designated Router OSPF
- 224.0.0.9 - RIP2
- 224.0.0.13 - PIM
- 224.0.0.15 - CBT
- 224.0.0.18 - VRRP
Notes:
IANA Reserved Addresses
IANA is the responsible Authority for the assignment of reserved class D addresses. Other interesting reserved addresses are:
224.0.0.2 - PIMv1 (ALL-ROUTERS - due to transport in IGMPv1)
224.0.0.5 - OSPF ALL ROUTERS (RFC1583)
224.0.0.6 - OSPF DESIGNATED ROUTERS (RFC1583)
224.0.0.9 - RIP2 Routers
224.0.0.13 - PIMv2
224.0.1.39 - CISCO-RP-ANNOUNCE (Auto-RP)
224.0.1.40 - CISCO-RP-DISCOVERY (Auto-RP)
“ftp://ftp.isi.edu/in-notes/iana/assignments/multicast-addresses” is the authoritative source for reserved multicast addresses.
Additional Information
"Administratively Scoped IP Multicast", June 1997, has a good discussion on scoped addresses. This document is available at:
“draft-ietf-mboned-admin-ip-space-03.txt”