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Versions: 00 01 02                                                      
Network Working Group                                             X. Xu
Internet Draft                                                    Z. Li
Category: Standard Track                                         Huawei

                                                               N. Sheth
                                                               Contrail

                                                                 Y. Lee
                                                                Comcast

                                                                 Y. Fan
                                                          China Telecom



Expires: August 2013                                  February 12, 2013


                BGP Tunnel Encapsulation Attribute for UDP

                      draft-xu-softwire-encaps-udp-00

Abstract

   This document specifies a new Border Gateway Protocol (BGP) Tunnel
   Type of User Datagram Protocol (UDP) tunnels.

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), its areas, and its working groups. Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.




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Internet-Draft    Tunnel Encapsulation Attribute for UDP  February 2013

   This Internet-Draft will expire on August 12, 2013.

Copyright Notice

   Copyright (c) 2013 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
   (http://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.

Conventions used in this document

   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 RFC-2119 [RFC2119].

Table of Contents


   1. Introduction ................................................ 3
   2. Terminology ................................................. 3
   3. BGP Tunnel Type Code for UDP ................................ 3
   4. Security Considerations ..................................... 3
   5. IANA Considerations ......................................... 3
   6. Acknowledgements ............................................ 3
   7. References .................................................. 4
      7.1. Normative References ................................... 4
      7.2. Informative References ................................. 4
   Authors' Addresses ............................................. 4













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Internet-Draft    Tunnel Encapsulation Attribute for UDP  February 2013


1. Introduction

   [RFC5512] specifies a method by which Border Gateway Protocol (BGP)
   speakers can signal tunnel encapsulation information to each other
   and accordingly it defines support for Generic Routing Encapsulation
   (GRE)[RFC2784], Layer Two Tunneling Protocol - Version 3 (L2TPv3)
   [RFC3931] and IP in IP [RFC2003] tunnel types. This document builds
   on [RFC5512] and defines support for the User Datagram Protocol (UDP)
   tunnel type which is applicable to at least the following two
   application cases: IP-in-UDP encapsulation [IP-IN-UDP] and MPLS-in-
   UDP encapsulation [MPLS-IN-UDP].

2. Terminology

   This memo makes use of the terms defined in [RFC5512].

3. BGP Tunnel Type Code for UDP

   To use either the Encapsulation Subsequent Address Family Identifier
   (SAFI) or the BGP Encapsulation Extended Community defined in
   [RFC5512] to signal the UDP tunnel type information across BGP
   speakers, a new Tunnel Type code (TBD) indicating the UDP tunnel
   type needs to be assigned by IANA.

   This document does not specify any UDP tunnel specific sub-TLV.
   Furthermore, the BGP Encapsulation Network Layer Reachability
   Information (NLRI) Format is not modified by this document.

4. Security Considerations

   The security considerations mentioned in [RFC5512] is applicable to
   this new BGP Tunnel Type code for UDP tunnels as well. No new
   security risk is introduced by this new Tunnel Type code for UDP
   tunnels.

5. IANA Considerations

   A new BGP Tunnel Type code indicating the UDP tunnel type needs to
   be assigned by IANA.

6. Acknowledgements

   Thanks to.






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Internet-Draft    Tunnel Encapsulation Attribute for UDP  February 2013

7. References

   7.1. Normative References

   [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
             Requirement Levels", BCP 14, RFC 2119, March 1997.

   7.2. Informative References

   [RFC5512] Mohapatra, P. and E. Rosen, "The BGP Encapsulation
             Subsequent Address Family Identifier (SAFI) and the BGP
             Tunnel Encapsulation Attribute", RFC 5512, April 2009.

   [RFC2784] Farinacci, D., Li, T., Hanks, S., Meyer, D., and P.
             Traina, "Generic Routing Encapsulation (GRE)", RFC 2784,
             March 2000.

   [RFC3931] Lau, J., Ed., Townsley, M., Ed., and I. Goyret, Ed.,
             "Layer Two Tunneling Protocol - Version 3 (L2TPv3)", RFC
             3931, March 2005.

   [RFC2003] Perkins, C., "IP Encapsulation within IP", RFC 2003,
             October 1996.

   [MPLS-in-UDP] Xu, X., Sheth, N., Yong, L., Pignataro, C., Fan, Y and
             Z. Li, "Encapsulating MPLS in UDP", draft-ietf-mpls-in-
             udp-00.txt (work in progress), January 2013.

   [IP-in-UDP] Xu, X., Pignataro, C., Towsley, M., Lee, Y and Y. Fan,
             "Encapsulating IP in UDP", draft-xu-softwire-ip-in-udp-
             00.txt (work in progress), December 2012.

Authors' Addresses

   Xiaohu Xu
   Huawei Technologies,
   Beijing, China
   Phone: +86-10-60610041
   Email: xuxiaohu@huawei.com


   Zhenbin Li
   Huawei Technologies,
   Beijing, China
   Phone: +86-10-60613676
   Email: lizhenbin@huawei.com




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Internet-Draft    Tunnel Encapsulation Attribute for UDP  February 2013


   Nischal Sheth
   Nischal Sheth
   Contrail Systems
   Email: nsheth@contrailsystems.com


   Yongbing Fan
   China Telecom
   Guangzhou, China.
   Phone: +86 20 38639121
   Email: fanyb@gsta.com


   Yiu Lee
   Comcast
   One Comcast Center
   Philadelphia, PA 1903
   USA
   Email: Yiu_Lee@Cable.Comcast.com






























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