Uberlay Interconnection of Multiple LISP overlays
draft-moreno-lisp-uberlay-01

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Last updated 2019-03-28
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Network Working Group                                          V. Moreno
Internet-Draft                                             Cisco Systems
Intended status: Experimental                               D. Farinacci
Expires: September 28, 2019                                  lispers.net
                                                      A. Rodriguez-Natal
                                                     M. Portoles-Comeras
                                                                F. Maino
                                                                S. Hooda
                                                             S. Kondalam
                                                           Cisco Systems
                                                          March 27, 2019

           Uberlay Interconnection of Multiple LISP overlays
                      draft-moreno-lisp-uberlay-01

Abstract

   This document describes the use of the Locator/ID Separation Protocol
   (LISP) to interconnect multiple disparate and independent network
   overlays by using a transit overlay.  The transit overlay is referred
   to as the "uberlay" and provides connectivity and control plane
   abstraction between different overlays.  Each network overlay may use
   different control and data plane approaches and may be managed by a
   different organization.  Structuring the network into multiple
   network overlays enables the interworking of different overlay
   approaches to data and control plane methods.  The different network
   overlays are autonomous from a control and data plane perspective,
   this in turn enables failure survivability across overlay domains.
   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].

Status of This Memo

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

Moreno, et al.         Expires September 28, 2019               [Page 1]
Internet-Draft                LISP Uberlay                    March 2019

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   This Internet-Draft will expire on September 28, 2019.

Copyright Notice

   Copyright (c) 2019 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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   (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  . . . . . . . .  11
     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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