Uberlay Interconnection of Multiple LISP overlays
draft-moreno-lisp-uberlay-00
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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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
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
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
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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