Encapsulating MPLS in UDP
draft-ietf-mpls-in-udp-08

The information below is for an old version of the document
Document Type Active Internet-Draft (mpls WG)
Last updated 2014-12-10
Replaces draft-xu-mpls-in-udp
Stream IETF
Intended RFC status Proposed Standard
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IESG IESG state Waiting for AD Go-Ahead::Point Raised - writeup needed
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IANA IANA review state Version Changed - Review Needed
Network Working Group                                              X. Xu
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                N. Sheth
Expires: June 13, 2015                                  Juniper Networks
                                                                 L. Yong
                                                              Huawei USA
                                                               R. Callon
                                                        Juniper Networks
                                                                D. Black
                                                         EMC Corporation
                                                       December 10, 2014

                       Encapsulating MPLS in UDP
                       draft-ietf-mpls-in-udp-08

Abstract

   This document specifies an IP-based encapsulation for MPLS, called
   MPLS-in-UDP (User Datagram Protocol).  The MPLS-in-UDP encapsulation
   technology MUST only be deployed within a service provider network or
   networks of an adjacent set of co-operating service providers where
   congestion control is not a concern.

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 June 13, 2015.

Copyright Notice

   Copyright (c) 2014 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

Xu, et al.                Expires June 13, 2015                 [Page 1]
Internet-Draft          Encapsulating MPLS in UDP          December 2014

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Existing Encapsulations . . . . . . . . . . . . . . . . .   3
     1.2.  Motivations for MPLS-in-UDP Encapsulation . . . . . . . .   3
     1.3.  Application Statements  . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Encapsulation in UDP  . . . . . . . . . . . . . . . . . . . .   4
     3.1.  UDP Checksum Usage with IPv6  . . . . . . . . . . . . . .   6
     3.2.  Middlebox Considerations for IPv6 UDP Zero Checksums  . .   8
   4.  Processing Procedures . . . . . . . . . . . . . . . . . . . .   9
   5.  Congestion Considerations . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  13
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     10.2.  Informative References . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   This document specifies an IP-based encapsulation for MPLS, i.e.
   MPLS-in-UDP (User Datagram Protocol), which is applicable in some
   circumstances where IP-based encapsulation for MPLS is required and
   further fine-grained load balancing of MPLS packets over IP networks
   over Equal Cost Multi-Path (ECMP) and/or Link Aggregation Groups
   (LAG) is required as well.  There are already IP-based encapsulations
   for MPLS that allow for fine-grained load balancing by using some
   special field in the encapsulation header as an entropy field.
   However, MPLS-in-UDP can be advantageous since some networks have
   used the UDP port number fields as a basis for load-balancing
   solutions for some time.  This is similar to why LISP [RFC6830] uses
   UDP encapsulation.

   Like other IP-based encapsulation methods for MPLS, this
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