< draft-ietf-6man-multicast-scopes-03.txt		draft-ietf-6man-multicast-scopes-04.txt >
	Internet Engineering Task Force R. Droms		Internet Engineering Task Force R. Droms
	Internet-Draft Cisco		Internet-Draft Cisco
	Updates: RFC 4007, RFC 4291 (if approved) February 14, 2014		Updates: 4007, 4291 (if approved) March 27, 2014
	Intended status: Standards Track		Intended status: Standards Track
	Expires: August 18, 2014		Expires: September 28, 2014
	IPv6 Multicast Address Scopes		IPv6 Multicast Address Scopes
	draft-ietf-6man-multicast-scopes-03.txt		draft-ietf-6man-multicast-scopes-04.txt
	Abstract		Abstract
	This document updates the definitions of IPv6 multicast scopes.		This document updates the definitions of IPv6 multicast scopes. This
			document updates RFC 4007 and RFC 4291
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	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/.
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	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
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	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 18, 2014.		This Internet-Draft will expire on September 28, 2014.
	Copyright Notice		Copyright Notice
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	1. Definition of IPv6 Multicast Address Scopes (Updates RFC 4291)		This document may contain material from IETF Documents or IETF
			Contributions published or made publicly available before November
			10, 2008. The person(s) controlling the copyright in some of this
			material may not have granted the IETF Trust the right to allow
			modifications of such material outside the IETF Standards Process.
			Without obtaining an adequate license from the person(s) controlling
			the copyright in such materials, this document may not be modified
			outside the IETF Standards Process, and derivative works of it may
			not be created outside the IETF Standards Process, except to format
			it for publication as an RFC or to translate it into languages other
			than English.
			1. Introduction
	RFC 4291 [RFC4291] defines "scop is a 4-bit multicast scope value		RFC 4291 [RFC4291] defines "scop is a 4-bit multicast scope value
	used to limit the scope of the multicast group." scop 3 is defined as		used to limit the scope of the multicast group." scop 3 is defined as
	"reserved" in RFC 4291. The multicast protocol specification in		"reserved" in RFC 4291. The multicast protocol specification in
	draft-ietf-roll-trickle-mcast [I-D.ietf-roll-trickle-mcast] desires		draft-ietf-roll-trickle-mcast [I-D.ietf-roll-trickle-mcast] desires
	to use multicast scop 3 for transport of multicast traffic scoped to		to use multicast scop 3 for transport of multicast traffic scoped to
	a network of nodes connected in a mesh. The use of this scop value		a network of nodes connected in a mesh. The use of this scop value
	is to accommodate a multicast scope that is greater than Link-Local		is to accommodate a multicast scope that is greater than Link-Local
	but is also automatically determined by the network architecture.		but is also automatically determined by the network architecture.
			2. Definition of IPv6 Multicast Address Scopes (Updates RFC 4291)
	The following table updates the definitions in RFC 4291:		The following table updates the definitions in RFC 4291:
	+------+--------------------------+		+------+--------------------------+
	| scop | NAME |		| scop | NAME |
	+------+--------------------------+		+------+--------------------------+
	| 0 | reserved |		| 0 | reserved |
	| 1 | Interface |		| 1 | Interface |
	| 2 | Link-Local scope |		| 2 | Link-Local scope |
	| 3 | Realm-Local scope |		| 3 | Realm-Local scope |
	| 4 | Admin-Local scope |		| 4 | Admin-Local scope |
	skipping to change at page 3, line 30 ¶		skipping to change at page 4, line 30 ¶
	of configuring their boundaries will be defined when the		of configuring their boundaries will be defined when the
	semantics of the scope is defined.		semantics of the scope is defined.
	According to RFC 4007 [RFC4007], the zone of a Realm-Local		According to RFC 4007 [RFC4007], the zone of a Realm-Local
	scope must fall within zones of larger scope. Because the		scope must fall within zones of larger scope. Because the
	zone of a Realm-Local scope is configured automatically,		zone of a Realm-Local scope is configured automatically,
	while the zones of larger scopes are configured manually,		while the zones of larger scopes are configured manually,
	care must be taken in the definition of those larger scopes		care must be taken in the definition of those larger scopes
	to ensure that inclusion contraint is met.		to ensure that inclusion contraint is met.
	2. Definition of Realm-Local scopes		3. Definition of Realm-Local scopes
	The definition of any Realm-Local scope for a particular network		The definition of any Realm-Local scope for a particular network
	technology should be published in an RFC. For example, such a scope		technology should be published in an RFC. For example, such a scope
	definition would be appropriate for publication in an "IPv6-over-foo"		definition would be appropriate for publication in an "IPv6-over-foo"
	RFC.		RFC.
	Any RFCs that include the definition of a Realm-Local scope will be		Any RFCs that include the definition of a Realm-Local scope will be
	listed in the IANA "IPv6 Multicast Address Scopes" registry.		listed in the IANA "IPv6 Multicast Address Scopes" registry.
	Section 4 gives the definition of scop 3 for IEEE 802.15.4		Section 5 gives the definition of scop 3 for IEEE 802.15.4
	[IEEE802.15.4] networks.		[IEEE802.15.4] networks.
	3. Definition of automatic and administratively configured scopes		4. Definition of automatic and administratively configured scopes
	(updates RFC 4007)		(updates RFC 4007)
	Section 5 of RFC 4007 [RFC4007] and section 2.7 of RFC 4291 disagree		Section 5 of RFC 4007 [RFC4007] and section 2.7 of RFC 4291 disagree
	about the way in which multicast scope 3 is configured. To resolve		about the way in which multicast scope 3 is configured. To resolve
	that disagreement, change the last bullet in the list in section 5 of		that disagreement, change the last bullet in the list in section 5 of
	RFC 4007 as follows:		RFC 4007 as follows:
	OLD:		OLD:
	o The boundaries of zones of a scope other than interface-local,		o The boundaries of zones of a scope other than interface-local,
	link-local, and global must be defined and configured by network		link-local, and global must be defined and configured by network
	administrators.		administrators.
	NEW:		NEW:
	o The boundaries of zones of a scope are defined by the IPv6		o The boundaries of zones of a scope are defined by the IPv6
	addressing architecture [RFC4291] and updated by this document.		addressing architecture [RFC4291] and updated by this document.
	4. Definition of Realm-Local Scope for IEEE 802.15.4		5. Definition of Realm-Local Scope for IEEE 802.15.4
	When used in an IP-over-IEEE802.15.4 network, "scop 3" is defined to		When used in an IP-over-IEEE802.15.4 network, "scop 3" is defined to
	include all interfaces sharing a PAN ID.		include all interfaces sharing a PAN ID.
	5. IANA Considerations		6. IANA Considerations
	IANA is asked to establish a sub-registry titled "IPv6 Multicast		IANA is asked to establish a sub-registry titled "IPv6 Multicast
	Address Scopes" in the existing "Internet Protocol version 6 (IPv6)		Address Scopes" in the existing "Internet Protocol version 6 (IPv6)
	Multicast Address Allocations" registry. The new registry is to be		Multicast Address Allocations" registry. The new registry is to be
	populated with the scope values given in section 1. New definitions		populated with the scope values given in section 1. New definitions
	for scop values will be made with "IETF Review" policy. The registry		for scop values will be made with "IETF Review" policy. The registry
	will have a note associated with scope 3 listing all RFCs that define		will have a note associated with scope 3 listing all RFCs that define
	Realm-Local scoping rules that use scope 3.		Realm-Local scoping rules that use scope 3.
	6. Acknowledgments		7. Acknowledgments
	Robert Cragie, Kerry Lynn, Jinmei Tatuya, Dave Thaler and Stig Venaas		Robert Cragie, Kerry Lynn, Jinmei Tatuya, Dave Thaler and Stig Venaas
	all contributed text and/or review to ensure that the updates to RFC		all contributed text and/or review to ensure that the updates to RFC
	4007 and RFC 4291 are correct		4007 and RFC 4291 are correct
	7. Security Considerations		8. Security Considerations
	This document has no security considerations beyond those in RFC 4007		This document has no security considerations beyond those in RFC 4007
	[RFC4007] and RFC 4291 [RFC4291].		[RFC4007] and RFC 4291 [RFC4291].
	8. References		9. References
	8.1. Normative References		9.1. Normative References
	[RFC4007] Deering, S., Haberman, B., Jinmei, T., Nordmark, E., and		[RFC4007] Deering, S., Haberman, B., Jinmei, T., Nordmark, E., and
	B. Zill, "IPv6 Scoped Address Architecture", RFC 4007,		B. Zill, "IPv6 Scoped Address Architecture", RFC 4007,
	March 2005.		March 2005.
	[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing		[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing
	Architecture", RFC 4291, February 2006.		Architecture", RFC 4291, February 2006.
	8.2. Informative References		9.2. Informative References
	[I-D.ietf-roll-trickle-mcast]		[I-D.ietf-roll-trickle-mcast]
	Hui, J. and R. Kelsey, "Multicast Protocol for Low power		Hui, J. and R. Kelsey, "Multicast Protocol for Low power
	and Lossy Networks (MPL)", draft-ietf-roll-trickle-		and Lossy Networks (MPL)", draft-ietf-roll-trickle-
	mcast-06 (work in progress), January 2014.		mcast-07 (work in progress), February 2014.
	[IEEE802.15.4]		[IEEE802.15.4]
	IEEE Std 802.15.4-2006, "IEEE Standard for Information		IEEE Std 802.15.4-2006, "IEEE Standard for Information
	technology - Telecommunications and information exchange		technology - Telecommunications and information exchange
	between systems - Local and metropolitan area networks -		between systems - Local and metropolitan area networks -
	Specific requirements; Part 15.4: Wireless Medium Access		Specific requirements; Part 15.4: Wireless Medium Access
	Control (MAC) and Physical Layer (PHY) Specifications for		Control (MAC) and Physical Layer (PHY) Specifications for
	Low-Rate Wireless Personal Area Networks (WPANs)", October		Low-Rate Wireless Personal Area Networks (WPANs)", October
	2006.		2006.
	Author's Address		Author's Address
	Ralph Droms		Ralph Droms
	Cisco		Cisco
	1414 Massachusetts Avenue		1414 Massachusetts Avenue
	Boxborough, MA 01719		Boxborough, MA 01719
	US		US
	Phone: +1 978 936 1674		Phone: +1 978 936 1674
	Email: rdroms@cisco.com		Email: rdroms.ietf@gmail.com
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