draft-ietf-mboned-64-multicast-address-format-00.txt   draft-ietf-mboned-64-multicast-address-format-01.txt 
MBONED Working Group M. Boucadair, Ed. MBONED Working Group M. Boucadair, Ed.
Internet-Draft France Telecom Internet-Draft France Telecom
Updates: 4291 (if approved) J. Qin Updates: 4291 (if approved) J. Qin
Intended status: Standards Track ZTE Intended status: Standards Track ZTE
Expires: August 9, 2012 Y. Lee Expires: September 1, 2012 Y. Lee
Comcast Comcast
S. Venaas S. Venaas
Cisco Systems Cisco Systems
X. Li X. Li
CERNET Center/Tsinghua CERNET Center/Tsinghua
University University
M. Xu M. Xu
Tsinghua University Tsinghua University
February 06, 2012 February 29, 2012
IPv4-Embedded IPv6 Multicast Address Format IPv4-Embedded IPv6 Multicast Address Format
draft-ietf-mboned-64-multicast-address-format-00 draft-ietf-mboned-64-multicast-address-format-01
Abstract Abstract
This document specifies an extension to the IPv6 multicast addressing This document specifies an extension to the IPv6 multicast addressing
architecture to be used in the context of IPv4-IPv6 interconnection. architecture to be used in the context of IPv4-IPv6 interconnection.
In particular, this document defines an address format for IPv4- In particular, this document defines an address format for IPv4-
embedded IPv6 multicast addresses. This address format can be used embedded IPv6 multicast addresses. This address format can be used
for IPv4-IPv6 translation or encapsulation schemes. for IPv4-IPv6 translation or encapsulation schemes.
This document updates RFC4291. This document updates RFC4291.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 9, 2012. This Internet-Draft will expire on September 1, 2012.
Copyright Notice Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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required to be provisioned. required to be provisioned.
The structure of the MPREFIX64 follows the guidelines specified in The structure of the MPREFIX64 follows the guidelines specified in
Section 3 for the ASM mode and Section 4 when SSM mode is used. Section 3 for the ASM mode and Section 4 when SSM mode is used.
The RECOMMENDED MPREFIX64 length is /96 (as shown in Figure 3). The RECOMMENDED MPREFIX64 length is /96 (as shown in Figure 3).
The format of the MPREFIX64 should follow what is specified in The format of the MPREFIX64 should follow what is specified in
[RFC3306] and [RFC3956] if corresponding mechanisms are used. [RFC3306] and [RFC3956] if corresponding mechanisms are used.
Note: the format specified in Section 3 uses some reserved bits The format specified in Section 3 uses some reserved bits defined
defined in [RFC3306] and [RFC3956]: the first bit of the reserved in [RFC3306] and [RFC3956]: the first of the reserved bits now has
bits have now a meaning, while the remaining bits MUST be set to a meaning, while the remaining bits MUST be set to 0.
0.
ASM Mode: ASM Mode:
| 8 | 4 | 4 | 4 | 76 | 32 | | 8 | 4 | 4 | 4 | 76 | 32 |
+--------+----+----+----+------------------------------+----------+ +--------+----+----+----+------------------------------+----------+
|11111111|flgs|scop|64IX| sub-group-id |v4 address| |11111111|flgs|scop|64IX| sub-group-id |v4 address|
+--------+----+----+----+------------------------------+----------+ +--------+----+----+----+------------------------------+----------+
| | | | | |
v v v v v v
+------------------------------------------------------+----------+ +------------------------------------------------------+----------+
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Figure 3: MPREFIX64 Figure 3: MPREFIX64
7. Source IPv4 Address in the IPv6 Realm 7. Source IPv4 Address in the IPv6 Realm
An IPv4 source is represented in the IPv6 realm with its IPv4- An IPv4 source is represented in the IPv6 realm with its IPv4-
converted IPv6 address [RFC6052]. converted IPv6 address [RFC6052].
8. Examples 8. Examples
Figure 4 provides an example of ASM IPv4-Embedded IPv6 Address while Figure 4 provides an example of ASM IPv4-Embedded IPv6 Address while
Figure 4 provides an example of SSM IPv4-Embedded IPv6 Address. Figure 5 provides an example of SSM IPv4-Embedded IPv6 Address.
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
| MPREFIX64 | IPv4 address | IPv4-embedded IPv6 address | | MPREFIX64 | IPv4 address | IPv4-embedded IPv6 address |
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
| ffxx:8000:abc::/96 | 224.1.2.3 | ffxx:8000:abc::224.1.2.3 | | ffxx:8000:abc::/96 | 224.1.2.3 | ffxx:8000:abc::224.1.2.3 |
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
Figure 4: Example of ASM IPv4-embedded IPv6 address Figure 4: Example of ASM IPv4-embedded IPv6 address
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
| MPREFIX64 | IPv4 address | IPv4-embedded IPv6 address | | MPREFIX64 | IPv4 address | IPv4-embedded IPv6 address |
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
| ff3x:0:8000::/96 | 232.1.2.3 | ffxx:0:8000::232.1.2.3 | | ff3x:0:8000::/96 | 232.1.2.3 | ff3x:0:8000::232.1.2.3 |
+---------------------+--------------+----------------------------+ +---------------------+--------------+----------------------------+
Figure 5: Example of SSM IPv4-embedded IPv6 address Figure 5: Example of SSM IPv4-embedded IPv6 address
9. IANA Considerations 9. IANA Considerations
Authors of this document request to reserve: Authors of this document request to reserve:
o ff3x:0:8000/33 SSM block to embed an IPv4 multicast address in the o ff3x:0:8000/33 SSM block to embed an IPv4 multicast address in the
last 32 bits. last 32 bits.
o ffxx:8000/17 ASM block to embed an IPv4 multicast address in the o ffxx:8000/17 ASM block to embed an IPv4 multicast address in the
last 32 bits. last 32 bits.
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