NAT traversal for LISP
draft-ermagan-lisp-nat-traversal-16
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Network Working Group V. Ermagan
Internet-Draft Google
Intended status: Experimental D. Farinacci
Expires: December 4, 2019 lispers.net
D. Lewis
F. Maino
M. Portoles
Cisco Systems, Inc.
J. Skriver
Arista
C. White
Logicalelegance, Inc.
June 2, 2019
NAT traversal for LISP
draft-ermagan-lisp-nat-traversal-16
Abstract
This document describes a mechanism for IPv4 NAT traversal for LISP
tunnel routers (xTR) and LISP Mobile Nodes (LISP-MN) behind a NAT
device. A LISP device both detects the NAT and initializes its
state. Forwarding to the LISP device through a NAT is enabled by the
LISP Re-encapsulating Tunnel Router (RTR) network element, which acts
as an anchor point in the data plane, forwarding traffic from
unmodified LISP devices through the NAT.
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 http://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 December 4, 2019.
Ermagan, et al. Expires December 4, 2019 [Page 1]
Internet-Draft NAT traversal for LISP June 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
Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . 3
3. Basic Overview . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. LISP NAT Traversal Overview . . . . . . . . . . . . . . . 6
4. LISP RTR Message Details . . . . . . . . . . . . . . . . . . 7
4.1. Info-Request Message . . . . . . . . . . . . . . . . . . 7
4.2. LISP Info-Reply . . . . . . . . . . . . . . . . . . . . . 9
4.3. LISP Map-Register Message . . . . . . . . . . . . . . . . 10
4.4. LISP Map-Notify . . . . . . . . . . . . . . . . . . . . . 11
4.5. LISP Data-Map-Notify Message . . . . . . . . . . . . . . 12
5. Protocol Operations . . . . . . . . . . . . . . . . . . . . . 14
5.1. xTR Processing . . . . . . . . . . . . . . . . . . . . . 14
5.1.1. ETR Registration . . . . . . . . . . . . . . . . . . 15
5.1.2. Map-Request and Map-Reply Handling . . . . . . . . . 16
5.1.3. xTR Sending and Receiving Data . . . . . . . . . . . 17
5.2. Map-Server Processing . . . . . . . . . . . . . . . . . . 18
5.3. RTR Processing . . . . . . . . . . . . . . . . . . . . . 19
5.3.1. RTR Data Forwarding . . . . . . . . . . . . . . . . . 21
5.4. Multi-homed xTRs . . . . . . . . . . . . . . . . . . . . 21
5.5. Example . . . . . . . . . . . . . . . . . . . . . . . . . 22
6. Security Considerations . . . . . . . . . . . . . . . . . . . 25
6.1. Acknowledgments . . . . . . . . . . . . . . . . . . . . . 26
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
8. Normative References . . . . . . . . . . . . . . . . . . . . 26
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction
The Locator/ID Separation Protocol [I-D.ietf-lisp-rfc6830bis]
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