IDR G. Huston Internet-Draft G. Michaelson Intended status:
Best CurrentStandards Track APNIC Practice September 9, 2008Expires: March 13,27, 2009 September 23, 2008 Textual Representation of AS Numbers draft-ietf-idr-as-representation-00.txtdraft-ietf-idr-as-representation-01.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. 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 March 13,27, 2009. Copyright Notice Copyright (C) The IETF Trust (2008).Abstract A textual representation for Autonomous System (AS) numbers is defined as the decimal value of the AS Number. This textual representation is to be used by all documents, systems and user interfaces referring to AS numbers. 1. Introduction A textual representation for Autonomous System (AS) numbers is defined as the decimal value of the AS Number. This textual representation is to be used by all documents, systems and user interfaces referring to AS numbers. This document notes a number of potential representation formats and proposes the adoption of a decimal value notation for AS numbers, or "asplain" according to the representation taxonomy described here. 2. Taxonomy of Representation Formats A taxonomy of representation for AS numbers is as follows: asplain refers to a syntax scheme of representing all AS numbers using decimal integer notation. Using asplain notation an AS number of value 65526 would be represented as the string "65526" and asan AS number of value 65546 would be represented as the string "65546". asdot+ refers to a syntax scheme of representing all AS numbers using a notation of two integer values joined by a period character: <high order 16-bit value in decimal>.<low order 16-bit value in decimal>. Using asdot+ notation, an AS number of value 65526 would be represented as the string "0.65526" and an AS number of value 65546 would be represented as the string "1.10". asdot refers to a syntax scheme of representing AS number values less than 65536 using asplain notation and representing AS number values equal to or greater than 65536 using asdot+ notation. Using asdot notation, an AS number of value 65526 would be represented as the string "65526" and asan AS number of value 65546 would be represented as the string "1.10". 3. Representation of AS Number Values To avoid confusion, a single textual notation is useful for documentation, configuration systems, reports, and external tools and information repositories. The decimal value representation, or "asplain" is proposed as the textual notiationnotation to use for AS Numbers. The "asplain" representation represents the number as its decimal value, without any field delimiter, corresponding to tothe lack of any internal fields definedstructure required by the semanticsuse of AS numbers.numbers in the inter- domain routing context. 4. IANA Considerations IANA Registries should use decimal representation ("asplain") for AS numbers. 5. Security Considerations This document does not refer to matters associated with security of routing systems. 6. Acknowledgments The terminology of "asplain", "asdot" and "asdot+" was originally devised and described by Juergen Kammer in January 2007 [KAMMER2007]. 7. Informative References [KAMMER2007] Kammer, J., "AS Number Formats", Jan 2007, <http://quagga.ncc.eurodata.de/asnumformat.html>. Authors' Addresses Geoff Huston Asia Pacific Network Information Centre Email: email@example.com George Michaelson Asia Pacific Network Information Centre Email: firstname.lastname@example.org Full Copyright Statement Copyright (C) The IETF Trust (2008). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights 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; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat 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 implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at email@example.com. Acknowledgment Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA).