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. Xu, et al. Expires August 12, 2013 [Page 1] 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 Xu, et al. Expires August 12, 2013 [Page 2] 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. Xu, et al. Expires August 12, 2013 [Page 3] 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 Xu, et al. Expires August 12, 2013 [Page 4] 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 Xu, et al. Expires August 12, 2013 [Page 5]