A Summary of Various Mechanisms Deployed at L-Root for the Identification of Anycast Nodes
draft-jabley-dnsop-anycast-mapping-00

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Network Working Group                                           J. Abley
Internet-Draft                                                     ICANN
Intended status: Informational                            March 25, 2013
Expires: September 26, 2013

       A Summary of Various Mechanisms Deployed at L-Root for the
                    Identification of Anycast Nodes
                 draft-jabley-dnsop-anycast-mapping-00

Abstract

   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

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   This Internet-Draft will expire on September 26, 2013.

Copyright Notice

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Internet-Draft     L-Root Anycast Node Identification         March 2013

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Naming Scheme for L-Root Nodes . . . . . . . . . . . . . . . .  4
   3.  Identification of L-Root Nodes . . . . . . . . . . . . . . . .  5
     3.1.  Use of NSID  . . . . . . . . . . . . . . . . . . . . . . .  5
     3.2.  Use of HOSTNAME.BIND/CH/TXT  . . . . . . . . . . . . . . .  6
     3.3.  Use of ID.SERVER/CH/TXT  . . . . . . . . . . . . . . . . .  6
     3.4.  Use of IDENTITY.L.ROOT-SERVERS.ORG/IN/TXT and IN/A . . . .  7
     3.5.  Use of NODES.L.ROOT-SERVERS.ORG/IN/TXT . . . . . . . . . .  8
   4.  Provisioning of IDENTITY.L.ROOT-SERVERS.ORG  . . . . . . . . .  9
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 12
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 13
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 13
   Appendix A.  Editorial Notes . . . . . . . . . . . . . . . . . . . 15
     A.1.  Change History . . . . . . . . . . . . . . . . . . . . . . 15
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 16

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1.  Introduction

   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
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