LISP Control Plane integration with NSH
draft-ermagan-lisp-nsh-02

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Last updated 2016-10-03
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LISP Working Group                                            V. Ermagan
Internet-Draft                                                  P. Quinn
Intended status: Experimental                                   D. Lewis
Expires: April 6, 2017                                          F. Maino
                                                                F. Coras
                                                       Cisco Systems Inc
                                                         October 3, 2016

                LISP Control Plane integration with NSH
                       draft-ermagan-lisp-nsh-02

Abstract

   This document defines extensions to the LISP control plane protocol
   to enable support for Network Service Header(NSH) based Service
   Function Chaining (SFC).

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   This Internet-Draft will expire on April 6, 2017.

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   Copyright (c) 2016 IETF Trust and the persons identified as the
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  LISP Model of Service Function Chaining . . . . . . . . . . .   2
   3.  Service Path Encoding . . . . . . . . . . . . . . . . . . . .   3
     3.1.  SPI LCAF  . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  LISP ITR Processing . . . . . . . . . . . . . . . . . . . . .   4
   5.  LISP Map-Server Processing  . . . . . . . . . . . . . . . . .   4
     5.1.  Packet Flow Example . . . . . . . . . . . . . . . . . . .   5
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The Locator/ID Separation Protocol (LISP) [LISP]defines a data plane
   encapsulation format that carries IPv4 and IPv6 packets using a LISP
   header - the LISP encapsulation - and an outer UDP/IP transport.

   The combination of the LISP encapsulation and the LISP control plane
   creates a dynamic network overlay.

   LISP-GPE [LISP-GPE] and VXLAN-GPE [VXLAN-GPE] define an extension to
   the LISP and VXLAN encapsulations with multi-protocol support,
   enabling encapsulation of any inner payload, including IP, Ethernet,
   and NSH [NSH].

   This document defines the necessary extensions to the LISP control
   plane to support dynamic NSH-based service function chaining ( map-
   and-encap based on SPI and SI) , using LISP-GPE/VXLAN-GPE as the
   overlay transport protocol.

2.  LISP Model of Service Function Chaining

   The NSH header [NSH] identifies the service path that a packet
   belongs to, and the next hop in the path for that packet via the
   Service Path Identifier (SPI) and Service Index (SI) fields in the
   Service Path header, as depicted in the figure below.

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