MS-originated SMRs
draft-rodrigueznatal-lisp-ms-smr-04

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LISP Working Group                                    A. Rodriguez-Natal
Internet-Draft                                             Cisco Systems
Updates: 6830 (if approved)                         A. Cabellos-Aparicio
Intended status: Experimental          Technical University of Catalonia
Expires: March 30, 2018                                       V. Ermagan
                                                                F. Maino
                                                           Cisco Systems
                                                               S. Barkai
                                                        Fermi Serverless
                                                      September 26, 2017

                           MS-originated SMRs
                  draft-rodrigueznatal-lisp-ms-smr-04

Abstract

   This document extends [RFC6830] to allow Map Servers to send SMR
   messages.

   This extension is intended to be used in some SDN deployments that
   use LISP as a southbound protocol with (P)ITRs that are compliant
   with [RFC6830].  In this use-case mapping updates do not come from
   ETRs, but rather from a centralized controller that pushes the
   updates directly to the Mapping System.  In such deployments, Map
   Servers will benefit from having a mechanism to inform directly
   (P)ITRs about updates in the mappings they are serving.

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 March 30, 2018.

Rodriguez-Natal, et al.  Expires March 30, 2018                 [Page 1]
Internet-Draft             MS-originated SMRs             September 2017

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Map Server extension  . . . . . . . . . . . . . . . . . . . .   3
   3.  Interoperability with legacy (P)ITRs  . . . . . . . . . . . .   3
   4.  Deployment considerations . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The Locator/ID Separation Protocol (LISP) [RFC6830] splits current IP
   addresses in two different namespaces, Endpoint Identifiers (EIDs)
   and Routing Locators (RLOCs).  LISP uses a map-and-encap approach
   that relies in two entities, the Mapping System and the Tunnel
   Routers.  The Tunnel Routers are deployed at LISP sites edge points
   and perform encapsulation and decapsulation of LISP data packets.
   The Mapping System is a distributed database that stores and
   disseminates EID-RLOC bindings across different Map-Servers.  LISP
   Tunnel Routers keep a cache of EID-RLOC mappings pulled from the
   Mapping System.

   There are several ways to keep this cache updated as described in
   [RFC6830].  Among them, the Solicit Map-Request (SMR) message allows
   to explicitly signal (P)ITRs to let them know that some of their
   cached mappings may be outdated.  However, vanilla LISP as described
   in [RFC6830] only considers SMR messages to be sent by an ETR.  This
   document extends [RFC6830] to cover the case where SMRs can be sent
   also by a Map Server (MS).
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