dna S. Yamamoto Internet-Draft C. Williams Expires: August 9, 2004 KDDI Labs USA G. Daley Monash University CTIE M. Parthasarathy February 9, 2004 Detecting Network Attachment Terminology draft-yamamoto-dna-term-00.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http:// www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on August 9, 2004. Copyright Notice Copyright (C) The Internet Society (2004). All Rights Reserved. Abstract The DNA working group is working on solutions for hosts to detect their IP layer connectivity and configuration status quickly which in turn would allow it to reconfigure the IP link faster than today. This document aims at providing definitions for key terms used by the group. Yamamoto, et al. Expires August 9, 2004 [Page 1] Internet-Draft Detecting Network Attachment Terminology February 2004 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 4. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4 Normative references . . . . . . . . . . . . . . . . . . . . . . 4 Informative References . . . . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5 Intellectual Property and Copyright Statements . . . . . . . . . 6 Yamamoto, et al. Expires August 9, 2004 [Page 2] Internet-Draft Detecting Network Attachment Terminology February 2004 1. Introduction Hosts need link-layer connectivity and correct IP layer configuration for sending and receiving packets. When a node suspects that link-layer connectivity has undergone change, it needs to check whether its IP layer connectivity or configuration are still valid. The DNA working group is working on solutions to detect IP layer connectivity changes and re-configures the IP configuration quickly. This document defines the key terms used by the group. 2. Terminology The following terminology is presented to describe components that are required for reliable detection of network attachment. Link Instance: A domain where all connected hosts may be reached through local broadcast or all-nodes multicast transmission. Neighbor: A host or router on the same link-instance as the node. Internet Connectivity: A state where a host can maintain communications with arbitrary destinations on the Internet. Network Attachment: An event subsequent to link-layer connection occurs when a host is able to send and receive some IP datagrams (particularly for configuration purposes) within a link-instance. IP Subnet: A range of addresses that share a common global prefix. Full Reachability: Also called Bi-directional Reachability. A neighbor is supposed to be fully reachable if one can both send and receive packets. IP link: A communication facility or medium over which nodes can communicate at the link layer. Partial Reachability Evidence that a host is within transmission or reception range of a neighbor. Reachability state is assumed to be available if a host receives advertisements from or data through the neighbor in question. Link Hint: f An indication from the link-layer to the IP layer that a change in link state may have occurred. These hints, while not considered authoritative for IP configuration, but can be used to initiate reachability checks or start to inquire about network information. Yamamoto, et al. Expires August 9, 2004 [Page 3] Internet-Draft Detecting Network Attachment Terminology February 2004 Eager Configuration Switching: An algorithm by which systems eagerly perform configuration signaling, without checking reachability of their neighbors or routers. Note that these systems may cause excessive configuration and signaling in some network topologies. Lazy Configuration Switching: An algorithm by which systems check reachability with its currently configured routers before undertaking configuration signaling. Most reachability checks take some time to determine a neighbor's absence, which will cause delays to configuration in lazy systems. Change Detection Evidence that the IP configuration on a link has changed, and that the host's IP address, routes, MLD groups or other data that may require updating. Link Information Parameters: Link Information Parameters are defined in the context of DNA as signal strength, signal quality and throughput. 3. Security Considerations This document presents only terminology. There are no security issues in this document. 4. Acknowledgments Thanks to participants within the DNA BOF whose emails and input help craft the terminology in this document. Normative references [1] Johnson, D., Perkins, C. and J. Arkko, "Mobility Support in IPv6", draft-ietf-mobileip-ipv6-24.txt Work In Progress, June 2003. Informative References [2] Manner, J. and M. Kojo, "Mobility Related Terminology", draft-ietf-seamoby-mobility-terminology-05.txt Work In Progress, , November 2003. Yamamoto, et al. Expires August 9, 2004 [Page 4] Internet-Draft Detecting Network Attachment Terminology February 2004 Authors' Addresses Shu Yamamoto KDDI Labs USA Palo Alto 94301 United States Phone: +650.566.8165 EMail: shu@kddilabs.com Carl Williams KDDI Labs USA Palo Alto, CA 94301 USA Phone: +1.650.279.5903 EMail: carlw@kddilabs.com Greg Daley Monash University CTIE Department of Electrical and Computer Systems Engineering Phone: EMail: greg.daley@eng.monash.edu.au Mohan Parthasarathy Palo Alto, CA 95015 United States EMail: mohanp@sbcglobal.net Yamamoto, et al. Expires August 9, 2004 [Page 5] Internet-Draft Detecting Network Attachment Terminology February 2004 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementors or users of this specification can be obtained from the IETF Secretariat. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director. Full Copyright Statement Copyright (C) The Internet Society (2004). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assignees. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION Yamamoto, et al. Expires August 9, 2004 [Page 6] Internet-Draft Detecting Network Attachment Terminology February 2004 HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Yamamoto, et al. Expires August 9, 2004 [Page 7]