17
CONFIDENTIAL
26-Jan-04
© 2002 Procket Networks, Inc. All rights reserved.
Multicast Addressing
•draft-albanna-iana-ipv4-mcast-guidelines-xx
•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
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”