Reservation of Last Autonomous System (AS) Numbers (RFC7300)
Original Publication Date: 2014-Jul-01
Included in the Prior Art Database: 2014-Jul-08
Internet Society Requests For Comment (RFCs)
J. Haas: AUTHOR [+2]
2. Requirements Language
Internet Engineering Task Force (IETF) J. Haas Request for Comments: 7300 Juniper Networks BCP: 6 J. Mitchell Updates: 1930 Microsoft Corporation Category: Best Current Practice July 2014 ISSN: 2070-1721
Reservation of Last Autonomous System (AS) Numbers
This document reserves two Autonomous System Numbers (ASNs) at the end of the 16-bit and 32-bit ranges, described in this document as "Last ASNs", and provides guidance to implementers and operators on their use. This document updates Section 10 of RFC 1930.
Status of This Memo
This memo documents an Internet Best Current Practice.
This document is a product of the Internet Engineering Task Force (IETF). It has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7300.
Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved.
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Mitchell Best Current
Practice [Page 1]
RFC 7300 Last AS Reservation July 2014
Over a decade ago, IANA reserved the last Autonomous System Number (ASN) of the 16-bit ASN range, 65535, with the intention that it not be used by network operators running BGP [RFC4271]. Since the introduction of "BGP Support for Four-Octet Autonomous System (AS) Number Space" [RFC6793], IANA has also reserved the last ASN of the 32-bit autonomous system number range, 4294967295. This reservation has been documented in the IANA "Autonomous System (AS) Numbers" registry [IANA.AS]. Although these "Last ASNs" border on Private Use ASN [RFC6996...