LISP Map Server Reliable Transport
draft-kouvelas-lisp-map-server-reliable-transport-04

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Last updated 2017-09-26
Replaces draft-kouvelas-lisp-reliable-transport
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Network Working Group                                          C. Cassar
Internet-Draft                                                  J. Leong
Intended status: Experimental                                   D. Lewis
Expires: March 29, 2018                                    Cisco Systems
                                                             I. Kouvelas
                                                    Arista Networks Inc.
                                                               J. Arango
                                                               Microsoft
                                                      September 25, 2017

                   LISP Map Server Reliable Transport
        draft-kouvelas-lisp-map-server-reliable-transport-04.txt

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

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   This Internet-Draft will expire on March 29, 2018.

Cassar, et al.           Expires March 29, 2018                 [Page 1]
Internet-Draft     LISP Map Server Reliable Transport     September 2017

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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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 [RFC6833].  Where required,
   reliability is pursued through periodic retransmissions that maintain
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