draft-ietf-6man-multicast-addr-arch-update-03.txt   draft-ietf-6man-multicast-addr-arch-update-04.txt 
6man Working Group M. Boucadair 6man Working Group M. Boucadair
Internet-Draft France Telecom Internet-Draft France Telecom
Updates: 3306,3956,4291 (if approved) S. Venaas Updates: 3306,3956,4291 (if approved) S. Venaas
Intended status: Standards Track Cisco Intended status: Standards Track Cisco
Expires: August 17, 2014 February 13, 2014 Expires: September 13, 2014 March 12, 2014
Updates to the IPv6 Multicast Addressing Architecture Updates to the IPv6 Multicast Addressing Architecture
draft-ietf-6man-multicast-addr-arch-update-03 draft-ietf-6man-multicast-addr-arch-update-04
Abstract Abstract
This document updates the IPv6 multicast addressing architecture by This document updates the IPv6 multicast addressing architecture by
defining the 17-20 reserved bits as generic flag bits. The document defining the 17-20 reserved bits as generic flag bits. The document
provides also some clarifications related to the use of these flag provides also some clarifications related to the use of these flag
bits. bits.
This document updates RFC 3956, RFC 3306 and RFC 4291. This document updates RFC 3956, RFC 3306 and RFC 4291.
skipping to change at page 1, line 42 skipping to change at page 1, line 42
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 17, 2014. This Internet-Draft will expire on September 13, 2014.
Copyright Notice Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the Copyright (c) 2014 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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| 8 | 4 | 4 | 4 | 4 | 8 | 64 | 32 | | 8 | 4 | 4 | 4 | 4 | 8 | 64 | 32 |
+--------+----+----+----+----+----+----------------+----------+ +--------+----+----+----+----+----+----------------+----------+
|11111111|ff1 |scop|ff2 |RIID|plen| network prefix | group ID | |11111111|ff1 |scop|ff2 |RIID|plen| network prefix | group ID |
+--------+----+----+----+----+----+----------------+----------+ +--------+----+----+----+----+----+----------------+----------+
+-+-+-+-+ +-+-+-+-+
ff1 is a set of four flags: |X|R|P|T| ff1 is a set of four flags: |X|R|P|T|
+-+-+-+-+ +-+-+-+-+
X may be set to 0 or 1. X may be set to 0 or 1.
R = 1 indicates a multicast address that embeds the address of the RP. R = 1 indicates a multicast address that embeds the address of the
P MUST be set to 1, and consequently T MUST be set to 1, according RP. P MUST be set to 1, and consequently T MUST be set to 1,
to [RFC3306], as this is a special case of according to [RFC3306], as this is a special case of unicast-prefix
unicast-prefix based addresses. This implies that for instance prefixes based addresses. This implies that for instance prefixes ff70::/12
ff70::/12 and fff0::/12 are embedded RP prefixes. and fff0::/12 are embedded RP prefixes. The behavior is unspecified
The behavior is unspecified if P or T is not set to 1. When the if P or T is not set to 1. When the R-bit is set, the last 4 bits of
R-bit is set, the last 4 bits of the previously reserved field are the field that were reserved in [RFC3306] are interpreted as
interpreted as embedding the RP interface ID, as specified in this memo. embedding the RP interface ID, as specified in this memo.
This document changes Section 4 of [RFC3956] as follows: This document changes Section 4 of [RFC3956] as follows:
OLD: OLD:
It MUST be a multicast address with "flgs" set to 0111, that is, It MUST be a multicast address with "flgs" set to 0111, that is,
to be of the prefix FF70::/12, to be of the prefix FF70::/12,
NEW: NEW:
 End of changes. 4 change blocks. 
11 lines changed or deleted 11 lines changed or added

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