LISP Site External Connectivity
draft-jain-lisp-site-external-connectivity-01

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Network Working Group                                            P. Jain
Internet-Draft                                                 V. Moreno
Intended status: Experimental                                   S. Hooda
Expires: November 3, 2020                                  Cisco Systems
                                                             May 2, 2020

                    LISP Site External Connectivity
             draft-jain-lisp-site-external-connectivity-01

Abstract

   This draft defines how to register/retrieve default-pETR mapping
   information in LISP when the destination is not registered/known to
   the local site and its mapping system (e.g. the destination is an
   internet or external site destination).

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on November 3, 2020.

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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

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   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   3
   3.  pETR Registration/Notification  . . . . . . . . . . . . . . .   3
   4.  pETR Request/Resolution . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   8.  Normative Reference . . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The LISP architecture and protocol [I-D.ietf-lisp-rfc6833bis]
   introduces two types of replies to a map-request sent by an ITR:

   - when the EID is known or registered to the mapping system, a
   regular map-reply with mapping information is sent, or

   - when the EID is unknown or known but not registered, a negative-
   map-reply (NMR) is sent.

   Currently the NMR does not convey pETR RLOC-set information to
   specify where the ITR should send the packet.

   This document describes how to use the LISP messages to register and
   provide pETR RLOC-set information for destinations which are EIDs not
   registered with the Mapping System, or simply are "not known" to be
   an existing EID.  These destinations could be the destinations which
   are outside of the LISP site belonging to non-LISP domains, hence are
   not registered with the LISP Mapping System.

   The reachability of these destinations can be provided either by
   configuring pETR information directly into the Mapping System, or by
   the registration done by certain pETRs.  The pETR registration is
   specifically useful when the traffic to these external destinations
   needs to be sent encapsulated to a preferred pETR/gateway chosen
   dynamically.  This mechanism also helps to achieve faster
   convergence.

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   This document also specifies the structure of the map-reply
   containing pETR RLOC-set information.

2.  Definition of Terms

   Same as defined in [I-D.ietf-lisp-rfc6833bis].

3.  pETR Registration/Notification

   pETRs having external or internet connectivity MAY register the pETR
   with the mapping system.  The pETR Map-Register/Map-Notify procedures