Experiences from Root Testbed in the Yeti DNS Project
draft-song-yeti-testbed-experience-02

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Internet Engineering Task Force                                  L. Song
Internet-Draft                                                   S. Kerr
Intended status: Informational                                    D. Liu
Expires: November 24, 2016                    Beijing Internet Institute
                                                            May 23, 2016

         Experiences from Root Testbed in the Yeti DNS Project
                 draft-song-yeti-testbed-experience-02

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.

   REMOVE BEFORE PUBLICATION: Although this document is submitted as an
   independent submission, comments are welcome in the IETF DNSOP (DNS
   Operations) working group mailing list.  The source of the document
   is currently placed at GitHub [xml-file].

Status of This Memo

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   This Internet-Draft will expire on November 24, 2016.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Song, et al.            Expires November 24, 2016               [Page 1]
Internet-DrExperiences from Root Testbed in the Yeti DNS Proj   May 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Yeti Testbed and Experiment Setup . . . . . . . . . . . . . .   5
     3.1.  Distribution Master . . . . . . . . . . . . . . . . . . .   6
       3.1.1.  Yeti root zone SOA SERIAL . . . . . . . . . . . . . .   7
       3.1.2.  Timing of Root Zone Fetch . . . . . . . . . . . . . .   7
       3.1.3.  Information Synchronization . . . . . . . . . . . . .   8
     3.2.  Yeti Root Servers . . . . . . . . . . . . . . . . . . . .   9
     3.3.  Yeti Resolvers and Experimental Traffic . . . . . . . . .   9
   4.  Experiments in Yeti Testbed . . . . . . . . . . . . . . . . .  10
     4.1.  Root Naming Scheme  . . . . . . . . . . . . . . . . . . .  11
     4.2.  Multiple-Signers with Multi-ZSK . . . . . . . . . . . . .  12
       4.2.1.  MZSK lab experiment . . . . . . . . . . . . . . . . .  12
       4.2.2.  MZSK Yeti experiment  . . . . . . . . . . . . . . . .  13
     4.3.  Root Renumbering Issue and Hint File Update . . . . . . .  13
     4.4.  DNS Fragments . . . . . . . . . . . . . . . . . . . . . .  14
     4.5.  The KSK Rollover Experiment in Yeti . . . . . . . . . . .  14
   5.  Other Technical findings and bugs . . . . . . . . . . . . . .  15
     5.1.  IPv6 fragments issue  . . . . . . . . . . . . . . . . . .  15
     5.2.  Root compression issue  . . . . . . . . . . . . . . . . .  16
     5.3.  SOA update delay issue  . . . . . . . . . . . . . . . . .  16
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  17
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
   Appendix A.  The Yeti root server in hint file  . . . . . . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   [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
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