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A Summary of Various Mechanisms Deployed at L-Root for the Identification of Anycast Nodes (RFC7108) Disclosure Number: IPCOM000234157D
Original Publication Date: 2014-Jan-01
Included in the Prior Art Database: 2014-Jan-16
Document File: 22 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Abley: AUTHOR [+2]


The Domain Name System (DNS) is described in [RFC1034] and [RFC1035]. L-Root, one of the thirteen root servers, is deployed using anycast [RFC4786]; its service addresses, published in the A and AAAA Resource Record (RR) Sets for "L.ROOT-SERVERS.NET", are made available from a substantial number of semi-autonomous servers deployed throughout the Internet. A list of locations served by L-Root can be found at [ROOT-SERVERS].

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Independent Submission                                          J. Abley Request for Comments: 7108                                     Dyn, Inc. Category: Informational                                     T. Manderson ISSN: 2070-1721                                                    ICANN                                                             January 2014

        A Summary of Various Mechanisms Deployed at L-Root for the                     Identification of Anycast Nodes


   Anycast is a deployment technique commonly employed for    authoritative-only servers in the Domain Name System (DNS).  L-Root,    one of the thirteen root servers, is deployed in this fashion.

   Various techniques have been used to map deployed anycast    infrastructure externally, i.e., without reference to inside    knowledge about where and how such infrastructure has been deployed.    Motivations for performing such measurement exercises include    operational troubleshooting and infrastructure risk assessment.  In    the specific case of L-Root, the ability to measure and map anycast    infrastructure using the techniques mentioned in this document is    provided for reasons of operational transparency.

   This document describes all facilities deployed at L-Root to    facilitate mapping of its infrastructure and serves as documentation    for L-Root as a measurable service.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for informational purposes.

   This is a contribution to the RFC Series, independently of any other    RFC stream.  The RFC Editor has chosen to publish this document at    its discretion and makes no statement about its value for    implementation or deployment.  Documents approved for publication by    the RFC Editor are not a candidate for any level of Internet    Standard; see 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

Abley & Manderson             Informational                     [Page 1]
 RFC 7108           L-Root Anycast Node Identification       January 2014

 Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as...