Multicast Network Address Translation
draft-jholland-mboned-mnat-01

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Mboned                                                        J. Holland
Internet-Draft                                 Akamai Technologies, Inc.
Intended status: Standards Track                       December 23, 2020
Expires: June 26, 2021

                 Multicast Network Address Translation
                     draft-jholland-mboned-mnat-01

Abstract

   This document defines a method for a network to maintain Network
   Address Translation address mappings for the transport of globally
   addressed multicast traffic within a network that can't otherwise
   forward the globally addressed traffic.  A new Multicast Network
   Address Translation (MNAT) service is defined to communicate the
   address mappings to ingress and egress points within the network, and
   considerations for operation of the MNAT service are described.

Status of This Memo

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   This Internet-Draft will expire on June 26, 2021.

Copyright Notice

   Copyright (c) 2020 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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   include Simplified BSD License text as described in Section 4.e of

Holland                   Expires June 26, 2021                 [Page 1]
Internet-Draft                    MNAT                     December 2020

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Background  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     1.4.  Notes for Contributors and Reviewers  . . . . . . . . . .   5
       1.4.1.  Venues for Contribution and Discussion  . . . . . . .   5
       1.4.2.  Implementation status . . . . . . . . . . . . . . . .   6
   2.  Protocol Operation  . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   6
       2.1.1.  Egress Node Operational Modes . . . . . . . . . . . .   7
     2.2.  Service Discovery . . . . . . . . . . . . . . . . . . . .   8
       2.2.1.  Detecting Invalid Services  . . . . . . . . . . . . .   8
     2.3.  RESTCONF Bootstrap  . . . . . . . . . . . . . . . . . . .   8
     2.4.  Message Handling  . . . . . . . . . . . . . . . . . . . .   8
       2.4.1.  Notification Subscription . . . . . . . . . . . . . .   8
       2.4.2.  Watcher Keys  . . . . . . . . . . . . . . . . . . . .   9
       2.4.3.  Egress Group Management . . . . . . . . . . . . . . .   9
       2.4.4.  Ingress Considerations  . . . . . . . . . . . . . . .  10
       2.4.5.  MNAT Service Considerations . . . . . . . . . . . . .  10
       2.4.6.  Example Messaging Walkthrough . . . . . . . . . . . .  11
   3.  YANG Model  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     3.1.  Yang Tree . . . . . . . . . . . . . . . . . . . . . . . .  11
     3.2.  Yang Module . . . . . . . . . . . . . . . . . . . . . . .  13
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
     4.1.  The YANG Module Names Registry  . . . . . . . . . . . . .  19
     4.2.  The XML Registry  . . . . . . . . . . . . . . . . . . . .  19
     4.3.  The Service Name and Transport Protocol Port Number
           Registry  . . . . . . . . . . . . . . . . . . . . . . . .  19
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  20
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  20
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  22
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   Network Address Translation is very widely used for unicast traffic
   in a variety of networks and according to a variety of mechanisms.