Uberlay Interconnection of Multiple LISP overlays
draft-moreno-lisp-uberlay-00

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Last updated 2018-11-04
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Network Working Group                                          V. Moreno
Internet-Draft                                             Cisco Systems
Intended status: Experimental                               D. Farinacci
Expires: May 8, 2019                                         lispers.net
                                                      A. Rodriguez-Natal
                                                     M. Portoles-Comeras
                                                                F. Maino
                                                                S. Hooda
                                                             S. Kondalam
                                                           Cisco Systems
                                                        November 4, 2018

           Uberlay Interconnection of Multiple LISP overlays
                      draft-moreno-lisp-uberlay-00

Abstract

   This document describes the use of the Locator/ID Separation Protocol
   (LISP) to create multiple independent and survivable network overlays
   that are interconnected by a transit overlay.  The transit overlay is
   referred to as the "uberlay" and provides connectivity and control
   plane abstraction between overlays.  Structuring the network into
   multiple network overlays allows each overlay to scale independently.
   The different network overlays are autonomous from a control and data
   plane perspective to enable failure survivability across overlays.
   The hierarchical structure of the multi-overlay network
   interconnected by an uberlay provides optimizations to the forwarding
   of unicast traffic as well as the replication of multicast traffic in
   both the overlay and underlay.  This document specifies the
   mechanisms and procedures for the distribution of control plane
   information across overlay sites and in the uberlay as well as the
   lookup and forwarding procedures for unicast and multicast traffic
   within and across overlays.  The specification also defines the
   procedures to support inter-overlay mobility of EIDs and their
   integration with the intra-overlay EID mobility procedures defined in
   draft-ietf-lisp-eid-mobility.

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 [RFC2119].

Moreno, et al.             Expires May 8, 2019                  [Page 1]
Internet-Draft                LISP Uberlay                 November 2018

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 May 8, 2019.

Copyright Notice

   Copyright (c) 2018 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   3
   3.  Interconnecting multiple LISP site-overlays via the Uberlay .   4
   4.  General Procedures  . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Control Plane Procedures  . . . . . . . . . . . . . . . .   8
       4.1.1.  Split-horizon at the Border xTRs  . . . . . . . . . .   9
     4.2.  Resolution and Forwarding Procedures  . . . . . . . . . .  10
       4.2.1.  Multi-overlay requests at border xTR  . . . . . . . .  10
     4.3.  Default EID registration and treatment  . . . . . . . . .  11
   5.  Multicast Specific Procedures . . . . . . . . . . . . . . . .  12
     5.1.  Inter-site-overlay Control Plane Procedures for Signal-
           free multicast  . . . . . . . . . . . . . . . . . . . . .  12
     5.2.  Border xTR Resolution and Forwarding procedures for
           Signal-free multicast . . . . . . . . . . . . . . . . . .  13
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