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Checking references for intended status: Proposed Standard ---------------------------------------------------------------------------- (See RFCs 3967 and 4897 for information about using normative references to lower-maturity documents in RFCs) == Outdated reference: A later version (-12) exists of draft-ietf-roll-trickle-mcast-09 Summary: 0 errors (**), 0 flaws (~~), 2 warnings (==), 2 comments (--). Run idnits with the --verbose option for more detailed information about the items above. -------------------------------------------------------------------------------- 2 Internet Engineering Task Force R. Droms 3 Internet-Draft Cisco 4 Updates: 4007, 4291 (if approved) May 16, 2014 5 Intended status: Standards Track 6 Expires: November 17, 2014 8 IPv6 Multicast Address Scopes 9 draft-ietf-6man-multicast-scopes-05.txt 11 Abstract 13 This document updates the definitions of IPv6 multicast scopes. This 14 document updates RFC 4007 and RFC 4291 16 Status of This Memo 18 This Internet-Draft is submitted in full conformance with the 19 provisions of BCP 78 and BCP 79. 21 Internet-Drafts are working documents of the Internet Engineering 22 Task Force (IETF). Note that other groups may also distribute 23 working documents as Internet-Drafts. The list of current Internet- 24 Drafts is at http://datatracker.ietf.org/drafts/current/. 26 Internet-Drafts are draft documents valid for a maximum of six months 27 and may be updated, replaced, or obsoleted by other documents at any 28 time. It is inappropriate to use Internet-Drafts as reference 29 material or to cite them other than as "work in progress." 31 This Internet-Draft will expire on November 17, 2014. 33 Copyright Notice 35 Copyright (c) 2014 IETF Trust and the persons identified as the 36 document authors. All rights reserved. 38 This document is subject to BCP 78 and the IETF Trust's Legal 39 Provisions Relating to IETF Documents 40 (http://trustee.ietf.org/license-info) in effect on the date of 41 publication of this document. Please review these documents 42 carefully, as they describe your rights and restrictions with respect 43 to this document. Code Components extracted from this document must 44 include Simplified BSD License text as described in Section 4.e of 45 the Trust Legal Provisions and are provided without warranty as 46 described in the Simplified BSD License. 48 This document may contain material from IETF Documents or IETF 49 Contributions published or made publicly available before November 50 10, 2008. The person(s) controlling the copyright in some of this 51 material may not have granted the IETF Trust the right to allow 52 modifications of such material outside the IETF Standards Process. 53 Without obtaining an adequate license from the person(s) controlling 54 the copyright in such materials, this document may not be modified 55 outside the IETF Standards Process, and derivative works of it may 56 not be created outside the IETF Standards Process, except to format 57 it for publication as an RFC or to translate it into languages other 58 than English. 60 1. Introduction 62 RFC 4291 [RFC4291] defines "scop is a 4-bit multicast scope value 63 used to limit the scope of the multicast group." scop 3 is defined as 64 "reserved" in RFC 4291. The multicast protocol specification in 65 draft-ietf-roll-trickle-mcast [I-D.ietf-roll-trickle-mcast] desires 66 to use multicast scop 3 for transport of multicast traffic scoped to 67 a network of nodes connected in a mesh. The use of this scop value 68 is to accommodate a multicast scope that is greater than Link-Local 69 but is also automatically determined by the network architecture. 71 2. Definition of IPv6 Multicast Address Scopes (Updates RFC 4291) 73 The following table updates the definitions in RFC 4291: 75 +------+--------------------------+ 76 | scop | NAME | 77 +------+--------------------------+ 78 | 0 | reserved | 79 | 1 | Interface | 80 | 2 | Link-Local scope | 81 | 3 | Realm-Local scope | 82 | 4 | Admin-Local scope | 83 | 5 | Site-Local scope | 84 | 6 | (unassigned) | 85 | 7 | (unassigned) | 86 | 8 | Organization-Local scope | 87 | 9 | (unassigned) | 88 | A | (unassigned) | 89 | B | (unassigned) | 90 | C | (unassigned) | 91 | D | (unassigned) | 92 | E | Global scope | 93 | F | reserved | 94 +------+--------------------------+ 96 The following change is applied to section 2.7 of RFC 4291: 98 OLD: 100 Admin-Local scope is the smallest scope that must be 101 administratively configured, i.e., not automatically derived 102 from physical connectivity or other, non-multicast-related 103 configuration. 105 NEW: 107 Interface-Local, Link-Local, and Realm-Local scope 108 boundaries are automatically derived from physical 109 connectivity or other, non-multicast related configuration. 110 Global scope has no boundary. The boundaries of all other 111 non-reserved scopes of Admin-Local or larger are 112 administratively configured. For reserved scopes, the way 113 of configuring their boundaries will be defined when the 114 semantics of the scope is defined. 116 According to RFC 4007 [RFC4007], the zone of a Realm-Local 117 scope must fall within zones of larger scope. Because the 118 zone of a Realm-Local scope is configured automatically, 119 while the zones of larger scopes are configured manually, 120 care must be taken in the definition of those larger scopes 121 to ensure that inclusion contraint is met. 123 3. Definition of Realm-Local scopes 125 The definition of any Realm-Local scope for a particular network 126 technology should be published in an RFC. For example, such a scope 127 definition would be appropriate for publication in an "IPv6-over-foo" 128 RFC. 130 Any RFCs that include the definition of a Realm-Local scope will be 131 listed in the IANA "IPv6 Multicast Address Scopes" registry. 133 Section 5 gives the definition of scop 3 for IEEE 802.15.4 134 [IEEE802.15.4] networks. 136 4. Definition of automatic and administratively configured scopes 137 (updates RFC 4007) 139 Section 5 of RFC 4007 [RFC4007] and section 2.7 of RFC 4291 disagree 140 about the way in which multicast scope 3 is configured. To resolve 141 that disagreement, change the last bullet in the list in section 5 of 142 RFC 4007 as follows: 144 OLD: 146 o The boundaries of zones of a scope other than interface-local, 147 link-local, and global must be defined and configured by network 148 administrators. 150 NEW: 152 o The boundaries of zones of a scope are defined by the IPv6 153 addressing architecture [RFC4291] and updated by this document. 155 5. Definition of Realm-Local Scope for IEEE 802.15.4 157 When used in an IP-over-IEEE802.15.4 network, "scop 3" is defined to 158 include all interfaces sharing a PAN ID. 160 6. IANA Considerations 162 IANA is asked to establish a sub-registry titled "IPv6 Multicast 163 Address Scopes" in the existing "Internet Protocol version 6 (IPv6) 164 Multicast Address Allocations" registry. The new registry is to be 165 populated with the scope values given in Section 2. New definitions 166 for scop values will be made with "IETF Review" policy. The registry 167 will have a note associated with scope 3 listing all RFCs that define 168 Realm-Local scoping rules that use scope 3. 170 7. Acknowledgments 172 Robert Cragie, Kerry Lynn, Jinmei Tatuya, Dave Thaler and Stig Venaas 173 all contributed text and/or review to ensure that the updates to RFC 174 4007 and RFC 4291 are correct 176 8. Security Considerations 178 This document has no security considerations beyond those in RFC 4007 179 [RFC4007] and RFC 4291 [RFC4291]. 181 9. References 183 9.1. Normative References 185 [RFC4007] Deering, S., Haberman, B., Jinmei, T., Nordmark, E., and 186 B. Zill, "IPv6 Scoped Address Architecture", RFC 4007, 187 March 2005. 189 [RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing 190 Architecture", RFC 4291, February 2006. 192 9.2. Informative References 194 [I-D.ietf-roll-trickle-mcast] 195 Hui, J. and R. Kelsey, "Multicast Protocol for Low power 196 and Lossy Networks (MPL)", draft-ietf-roll-trickle- 197 mcast-09 (work in progress), April 2014. 199 [IEEE802.15.4] 200 IEEE Std 802.15.4-2006, "IEEE Standard for Information 201 technology - Telecommunications and information exchange 202 between systems - Local and metropolitan area networks - 203 Specific requirements; Part 15.4: Wireless Medium Access 204 Control (MAC) and Physical Layer (PHY) Specifications for 205 Low-Rate Wireless Personal Area Networks (WPANs)", October 206 2006. 208 Author's Address 210 Ralph Droms 211 Cisco 212 1414 Massachusetts Avenue 213 Boxborough, MA 01719 214 US 216 Phone: +1 978 936 1674 217 Email: rdroms.ietf@gmail.com