LISP Map Server Reliable Transport
draft-kouvelas-lisp-map-server-reliable-transport-05

Document Type Active Internet-Draft (individual)
Last updated 2019-08-08
Replaces draft-kouvelas-lisp-reliable-transport
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Network Working Group                                           J. Leong
Internet-Draft                                                  D. Lewis
Intended status: Experimental                                   B. Pitta
Expires: February 7, 2020                                  Cisco Systems
                                                               C. Cassar
                                                                   Tesla
                                                             I. Kouvelas
                                                    Arista Networks Inc.
                                                               J. Arango
                                                               Microsoft
                                                          August 6, 2019

                   LISP Map Server Reliable Transport
          draft-kouvelas-lisp-map-server-reliable-transport-05

Abstract

   The communication between LISP ETRs and Map-Servers is based on
   unreliable UDP message exchange coupled with periodic message
   transmission in order to maintain soft state.  The drawback of
   periodic messaging is the constant load imposed on both the ETR and
   the Map-Server.  New use cases for LISP have increased the amount of
   state that needs to be communicated with requirements that are not
   satisfied by the current mechanism.  This document introduces the use
   of a reliable transport for ETR to Map-Server communication in order
   to eliminate the periodic messaging overhead, while providing
   reliability, flow-control and endpoint liveness detection.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on February 7, 2020.

Leong, et al.           Expires February 7, 2020                [Page 1]
Internet-Draft     LISP Map Server Reliable Transport        August 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Notation . . . . . . . . . . . . . . . . . . . .   3
   3.  Message Format  . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Session Establishment . . . . . . . . . . . . . . . . . . . .   5
   5.  Error Notifications . . . . . . . . . . . . . . . . . . . . .   5
   6.  EID Prefix Registration . . . . . . . . . . . . . . . . . . .   7
     6.1.  Reliable Mapping Registration Messages  . . . . . . . . .   7
       6.1.1.  Registration Message  . . . . . . . . . . . . . . . .   8
       6.1.2.  Registration Acknowledgement Message  . . . . . . . .   8
       6.1.3.  Registration Rejection Message  . . . . . . . . . . .   9
       6.1.4.  Registration Refresh Message  . . . . . . . . . . . .  10
       6.1.5.  Mapping Notification Message  . . . . . . . . . . . .  12
     6.2.  ETR Behavior  . . . . . . . . . . . . . . . . . . . . . .  13
     6.3.  Map-Server Behavior . . . . . . . . . . . . . . . . . . .  17
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     8.1.  LISP Reliable Transport Message Types . . . . . . . . . .  18
     8.2.  Transport Protocol Port Numbers . . . . . . . . . . . . .  18
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   10. Normative References  . . . . . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   The communication channel between LISP ETRs and Map-Servers is based
   on unreliable UDP message exchange [I-D.ietf-lisp-rfc6833bis].  Where
   required, reliability is pursued through periodic retransmissions
   that maintain soft state on the peer.  Map-Register messages are
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