Experiences from Root Testbed in the Yeti DNS Project
draft-song-yeti-testbed-experience-00

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Internet Engineering Task Force                                  L. Song
Internet-Draft                                                   S. Kerr
Intended status: Informational                                    D. Liu
Expires: May 23, 2016                         Beijing Internet Institute
                                                       November 20, 2015

         Experiences from Root Testbed in the Yeti DNS Project
                 draft-song-yeti-testbed-experience-00

Abstract

   This document reports and discusses issues in DNS root services,
   based on experiences from the experiments in the Yeti DNS project.
   These issues include IPv6-only operation, the root DNS server naming
   scheme, DNSSEC KSK rollover, root server renumbering, multiple root
   zone signer, and so on.  This project was founded in May 2015 and has
   since built a live root DNS server system testbed with volunteer root
   server and resolver operations.

Status of This Memo

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   This Internet-Draft will expire on May 23, 2016.

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   Copyright (c) 2015 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
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Song, et al.              Expires May 23, 2016                  [Page 1]
Internet-DraftExperiences from Root Testbed in the Yeti DNSNovember 2015

   include Simplified BSD License text as described in Section 4.e of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Yeti Testbed and Experiment Setup . . . . . . . . . . . . . .   4
     3.1.  Distribution Master . . . . . . . . . . . . . . . . . . .   6
       3.1.1.  Yeti root zone SOA SERIAL . . . . . . . . . . . . . .   6
       3.1.2.  Timing of Root Zone Fetch . . . . . . . . . . . . . .   7
       3.1.3.  Information Synchronization . . . . . . . . . . . . .   7
     3.2.  Yeti Root Servers . . . . . . . . . . . . . . . . . . . .   8
     3.3.  Yeti Resolvers and Experimental Traffic . . . . . . . . .  10
   4.  Experiments in Yeti Testbedd  . . . . . . . . . . . . . . . .  10
     4.1.  Naming Scheme and Glue Issue  . . . . . . . . . . . . . .  11
     4.2.  Multiple-Signers with Multi-ZSK . . . . . . . . . . . . .  12
     4.3.  Root Renumbering Issue and Hint File Update . . . . . . .  14
     4.4.  DNS Fragments . . . . . . . . . . . . . . . . . . . . . .  15
     4.5.  The KSK Rollover Experiment in Yeti . . . . . . . . . . .  15
   5.  Other Technical findings and bugs . . . . . . . . . . . . . .  16
     5.1.  IPv6 fragments issue  . . . . . . . . . . . . . . . . . .  16
     5.2.  Root compression issue  . . . . . . . . . . . . . . . . .  17
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  17
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   RFC 1034[RFC1034] says the domain name space is a tree structure.
   The top level of the tree for the unique identifier system is the DNS
   root system.  It has been operational for 25+ years.  It is pivotal
   to making the current Internet useful.  So it is considered somewhat
   ossified for stability reasons.  It is hard to test and implement new
   ideas evolving to a more advanced level to counter challenges like
   IPv6-only operation, DNSSEC key/algorithm rollover [RFC4986], scaling
   issues, and so on.  In order to make the test more practical, it is
   also necessary to involve users' environments which are highly
   diversified, in order to study the effect of the changes in question.

   To benefit Internet development as a whole, the Yeti Project
   [Yeti-DNS-Project] was proposed to build a parallel, experimental,
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