INTERNET-DRAFT R. Hinden, Ipsilon Networks
November 13, 1996 S. Deering, Cisco
IPv6 Multicast Address Assignments
<draft-ietf-ipngwg-multicast-assgn-01.txt>
Status of this Memo
This document is an Internet Draft. Internet Drafts are working
documents of the Internet Engineering Task Force (IETF), its Areas,
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current status of any Internet Draft.
1.0 Introduction
This document defines the initial assignment of IPv6 multicast
addresses. It is based on the "RFC-1884 IP Version 6 Addressing
Architecture" [RFC1884] and current IPv4 multicast address assignment
found in <ftp://venera.isi.edu/in-notes/iana/assignments/multicast-
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 solicited on this
conversion.
All other IPv6 multicast addresses are reserved.
Sections 2 and 3 specify reserved and preassigned IPv6 multicast
addresses. Section 4 defines guidelines for assigning new IPv6
multicast addresses.
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INTERNET-DRAFT IPv6 Multicast Address Assignments 13 Nov 96
2. Fixed Scope Multicast Addresses
These permanently assigned multicast addresses are valid over a
specified scope value.
2.1 Node-Local Scope
FF01:0:0:0:0:0:0:1 All Nodes Address [RFC1884]
FF01:0:0:0:0:0:0:2 All Routers Address [RFC1884]
2.2 Link-Local Scope
FF02:0:0:0:0:0:0:1 All Nodes Address [RFC1884]
FF02:0:0:0:0:0:0:2 All Routers Address [RFC1884]
FF02:0:0:0:0:0:0:3 Unassigned [JBP]
FF02:0:0:0:0:0:0:4 DVMRP Routers [RFC1075,JBP]
FF02:0:0:0:0:0:0:5 OSPFIGP [RFC1583,Moy]
FF02:0:0:0:0:0:0:6 OSPFIGP Designated Routers [RFC1583,Moy]
FF02:0:0:0:0:0:0:7 ST Routers [RFC1190,KS14]
FF02:0:0:0:0:0:0:8 ST Hosts [RFC1190,KS14]
FF02:0:0:0:0:0:0:9 RIP Routers [RFC1723,GSM11]
FF02:0:0:0:0:0:0:A EIGRP Routers [Farinacci]
FF02:0:0:0:0:0:0:B Mobile-Agents [Bill Simpson]
FF02:0:0:0:0:0:0:D All PIM Routers [Farinacci]
FF02:0:0:0:0:0:0:E RSVP-ENCAPSULATION [Braden]
FF02:0:0:0:0:0:1:1 Link Name [Harrington]
FF02:0:0:0:0:0:1:2 All-dhcp-agents [Bound,Perkins]
FF02:0:0:0:0:0:1:3 All-dhcp-servers [Bound,Perkins]
FF02:0:0:0:0:0:1:4 All-dhcp-relays [Bound,Perkins]
FF02:0:0:0:0:1:XXXX:XXXX Solicited-Node Address [RFC1884]
2.3 Site-Local Scope
FF05:0:0:0:0:0:1:2 All-dhcp-agents [Bound,Perkins]
FF05:0:0:0:0:0:1:3 All-dhcp-servers [Bound,Perkins]
FF05:0:0:0:0:0:1:4 All-dhcp-relays [Bound,Perkins]
3.0 All Scope Multicast Addresses
These permanently assigned multicast addresses are valid over all
scope ranges. This is shown by an "X" in the scope field of the
address that means any legal scope value.
Note that, as defined in RFC1884, IPv6 multicast addresses which are
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INTERNET-DRAFT IPv6 Multicast Address Assignments 13 Nov 96
only different in scope represent different groups. Nodes must join
each group individually.
The IPv6 multicast addresses with variable scope are as follows:
FF0X:0:0:0:0:0:0:0 Reserved Multicast Address [RFC1884]
FF0X:0:0:0:0:0:0:100 VMTP Managers Group [RFC1045,DRC3]
FF0X:0:0:0:0:0:0:101 Network Time Protocol (NTP) [RFC1119,DLM1]
FF0X:0:0:0:0:0:0:102 SGI-Dogfight [AXC]
FF0X:0:0:0:0:0:0:103 Rwhod [SXD]
FF0X:0:0:0:0:0:0:104 VNP [DRC3]
FF0X:0:0:0:0:0:0:105 Artificial Horizons - Aviator [BXF]
FF0X:0:0:0:0:0:0:106 NSS - Name Service Server [BXS2]
FF0X:0:0:0:0:0:0:107 AUDIONEWS - Audio News Multicast [MXF2]
FF0X:0:0:0:0:0:0:108 SUN NIS+ Information Service [CXM3]
FF0X:0:0:0:0:0:0:109 MTP Multicast Transport Protocol [SXA]
FF0X:0:0:0:0:0:0:10A IETF-1-LOW-AUDIO [SC3]
FF0X:0:0:0:0:0:0:10B IETF-1-AUDIO [SC3]
FF0X:0:0:0:0:0:0:10C IETF-1-VIDEO [SC3]
FF0X:0:0:0:0:0:0:10D IETF-2-LOW-AUDIO [SC3]
FF0X:0:0:0:0:0:0:10E IETF-2-AUDIO [SC3]
FF0X:0:0:0:0:0:0:10F IETF-2-VIDEO [SC3]
FF0X:0:0:0:0:0:0:110 MUSIC-SERVICE [Guido van Rossum]
FF0X:0:0:0:0:0:0:111 SEANET-TELEMETRY [Andrew Maffei]
FF0X:0:0:0:0:0:0:112 SEANET-IMAGE [Andrew Maffei]
FF0X:0:0:0:0:0:0:113 MLOADD [Braden]
FF0X:0:0:0:0:0:0:114 any private experiment [JBP]
FF0X:0:0:0:0:0:0:115 DVMRP on MOSPF [Moy]
FF0X:0:0:0:0:0:0:116 SVRLOC [Veizades]
FF0X:0:0:0:0:0:0:117 XINGTV <hgxing@aol.com>
FF0X:0:0:0:0:0:0:118 microsoft-ds <arnoldm@microsoft.com>
FF0X:0:0:0:0:0:0:119 nbc-pro <bloomer@birch.crd.ge.com>
FF0X:0:0:0:0:0:0:11A nbc-pfn <bloomer@birch.crd.ge.com>
FF0X:0:0:0:0:0:0:11B lmsc-calren-1 [Uang]
FF0X:0:0:0:0:0:0:11C lmsc-calren-2 [Uang]
FF0X:0:0:0:0:0:0:11D lmsc-calren-3 [Uang]
FF0X:0:0:0:0:0:0:11E lmsc-calren-4 [Uang]
FF0X:0:0:0:0:0:0:11F ampr-info [Janssen]
FF0X:0:0:0:0:0:0:120 mtrace [Casner]
FF0X:0:0:0:0:0:0:121 RSVP-encap-1 [Braden]
FF0X:0:0:0:0:0:0:122 RSVP-encap-2 [Braden]
FF0X:0:0:0:0:0:0:123 SVRLOC-DA [Veizades]
FF0X:0:0:0:0:0:0:124 rln-server [Kean]
FF0X:0:0:0:0:0:0:125 proshare-mc [Lewis]
FF0X:0:0:0:0:0:0:126 dantz [Yackle]
draft-ietf-ipngwg-multicast-assgn-01.txt [Page 3]
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FF0X:0:0:0:0:0:0:127 cisco-rp-announce [Farinacci]
FF0X:0:0:0:0:0:0:128 cisco-rp-discovery [Farinacci]
FF0X:0:0:0:0:0:0:129 gatekeeper [Toga]
FF0X:0:0:0:0:0:0:12A iberiagames [Marocho]
FF0X:0:0:0:0:0:0:201 "rwho" Group (BSD) (unofficial) [JBP]
FF0X:0:0:0:0:0:0:202 SUN RPC PMAPPROC_CALLIT [BXE1]
FF0X:0:0:0:0:0:2:0000
-FF0X:0:0:0:0:0:2:7FFD Multimedia Conference Calls [SC3]
FF0X:0:0:0:0:0:2:7FFE SAPv1 Announcements [SC3]
FF0X:0:0:0:0:0:2:7FFF SAPv0 Announcements (deprecated) [SC3]
FF0X:0:0:0:0:0:2:8000
-FF0X:0:0:0:0:0:2:FFFF SAP Dynamic Assignments [SC3]
4.0 Assignment of New IPv6 Multicast Addresses
Multicast address as defined in [RFC1884] have the following format:
| 8 | 4 | 4 | 112 bits |
+------ -+----+----+---------------------------------------------+
|11111111|flgs|scop| group ID |
+--------+----+----+---------------------------------------------+
The current approach [RFC1972] to map IPv6 multicast addresses into
IEEE 802 MAC addresses takes the low order 32 bits of the IPv6
multicast address and uses it to create a MAC address. Groups ID's
less than or equal to 32 bits will generate unique MAC addresses.
Due to this new IPv6 multicast addresses should be assigned so that
the group identifier is always in the low order 32 bits as shown in
the following:
| 8 | 4 | 4 | 80 bits | 32 bits |
+------ -+----+----+---------------------------+-----------------+
|11111111|flgs|scop| reserved must be zero | group ID |
+--------+----+----+---------------------------+-----------------+
While this limits the number of permanent IPv6 multicast groups to
2^32 this is unlikely to be a limitation in the future. If it
becomes necessary to exceed this limit in the future multicast will
still work but the processing will be sightly slower.
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5.0 References
[RFC1887] Rekhter, Y., Li, T., "An Architecture for IPv6 Unicast
Address Allocation", RFC-1887, December 1995.
[RFC1884] Hinden, R., "IP Version 6 Addressing Architecture",
RFC-1884, December 1995.
[AUTORFC] Thompson, S., "IPv6 Stateless Address Autoconfiguration",
Internet Draft.
[RFC1045] Cheriton, D., "VMTP: Versatile Message Transaction Protocol
Specification", RFC 1045, Stanford University, February
1988.
[RFC1075] Waitzman, D., C. Partridge, and S. Deering "Distance Vector
Multicast Routing Protocol", RFC-1075, BBN STC, Stanford
University, November 1988.
[RFC1112] Deering, S., "Host Extensions for IP Multicasting", STD 5,
RFC 1112, Stanford University, August 1989.
[RFC1119] Mills, D., "Network Time Protocol (Version 1),
Specification and Implementation", STD 12, RFC 1119,
University of Delaware, July 1988.
[RFC1190] Topolcic, C., Editor, "Experimental Internet Stream
Protocol, Version 2 (ST-II)", RFC 1190, CIP Working Group,
October 1990.
[RFC1583] Moy, J., "The OSPF Specification", RFC 1583, Proteon, March
1994.
[RFC1723] Malkin, G., "RIP Version 2: Carying Additional
Information", RFC 1723, Xylogics, November 1994.
[RFC1884] Hinden, R., and S. Deering, "IP Version 6 Addressing
Architecture", RFC 1884, Ipsilon Networks, Xerox PARC,
December 1995.
[RFC1972] Crawford, M., "A Method for the Transmission of IPv6
Packets over Ethernet Networks", RFC 11972, Fermilab,
August 1996.
draft-ietf-ipngwg-multicast-assgn-01.txt [Page 5]
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6. People
<arnoldm@microsoft.com>
[AXC] Andrew Cherenson <arc@SGI.COM>
[Braden] Bob Braden, <braden@isi.edu>, April 1996.
[Bob Brenner]
[Bressler] David J. Bressler, <bressler@tss.com>, April 1996.
<bloomer@birch.crd.ge.com>
[Bound] Jim Bound <bound@zk3.dec.com>
[BXE1] Brendan Eic <brendan@illyria.wpd.sgi.com>
[BXF] Bruce Factor <ahi!bigapple!bruce@uunet.UU.NET>
[BXS2] Bill Schilit <schilit@parc.xerox.com>
[Casner] Steve Casner, <casner@isi.edu>, January 1995.
[CXM3] Chuck McManis <cmcmanis@sun.com>
[Tim Clark]
[DLM1] David Mills <Mills@HUEY.UDEL.EDU>
[DRC3] Dave Cheriton <cheriton@PESCADERO.STANFORD.EDU>
[DXS3] Daniel Steinber <Daniel.Steinberg@Eng.Sun.COM>
[Farinacci] Dino Farinacci, <dino@cisco.com>
[GSM11] Gary S. Malkin <GMALKIN@XYLOGICS.COM>
[Harrington] Dan Harrington, <dan@lkg.dec.com>, July 1996.
<hgxing@aol.com>
[IANA] IANA <iana@isi.edu>
[Janssen] Rob Janssen, <rob@pe1chl.ampr.org>, January 1995.
[JBP] Jon Postel <postel@isi.edu>
draft-ietf-ipngwg-multicast-assgn-01.txt [Page 6]
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[JXM1] Jim Miner <miner@star.com>
[Kean] Brian Kean, <bkean@dca.com>, August 1995.
[KS14] <mystery contact>
[Lee] Choon Lee, <cwl@nsd.3com.com>, April 1996.
[Lewis] Mark Lewis, <Mark_Lewis@ccm.jf.intel.com>, October 1995.
[Malamud] Carl Malamud, <carl@radio.com>, January 1996.
[Andrew Maffei]
[Marohco] Jose Luis Marocho, <73374.313@compuserve.com>, July 1996.
[Moy] John Moy <jmoy@casc.com>
[MXF2] Martin Forssen <maf@dtek.chalmers.se>
[Perkins] Charlie Perkins, <perk@watson.ibm.com>
[Guido van Rossum]
[SC3] Steve Casner <casner@isi.edu>
[Simpson] Bill Simpson <bill.simpson@um.cc.umich.edu> November 1994.
[Joel Snyder]
[SXA] Susie Armstrong <Armstrong.wbst128@XEROX.COM>
[SXD] Steve Deering <deering@PARC.XEROX.COM>
[tynan] Dermot Tynan, <dtynan@claddagh.ie>, August 1995.
[Toga] Jim Toga, <jtoga@ibeam.jf.intel.com>, May 1996.
[Uang] Yea Uang <uang@force.decnet.lockheed.com> November 1994.
[Veizades] John Veizades, <veizades@tgv.com>, May 1995.
[Yackle] Dotty Yackle, <ditty_yackle@dantz.com>, February 1996.
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7.0 Security Considerations
Security issues are not discussed in this memo.
8.0 Authors' Addresses
Robert M. Hinden
Ipsilon Networks, Inc.
232 Java Way
Sunnyvale, CA 94089
USA
phone: +1 415 990 2004
email: hinden@ipsilon.com
Stephen E. Deering
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
phone: +1 408 527-8213
email: deering@cisco.com
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