datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

A Stateless Transport Tunneling Protocol for Network Virtualization (STT)
draft-davie-stt-06

Document type: Active Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2014-04-15
Intended RFC status: Unknown
Other versions: plain text, xml, pdf, html

Stream State:No stream defined
Document shepherd: No shepherd assigned

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                                      B. Davie, Ed.
Internet-Draft                                                  J. Gross
Intended status: Informational                              VMware, Inc.
Expires: October 17, 2014                                 April 15, 2014

  A Stateless Transport Tunneling Protocol for Network Virtualization
                                 (STT)
                           draft-davie-stt-06

Abstract

   Network Virtualization places unique requirements on tunneling
   protocols.  This draft describes STT (Stateless Transport Tunneling),
   a tunnel encapsulation that enables overlay networks to be built in
   virtualized networks.  STT is particularly useful when some tunnel
   endpoints are in end-systems, as it utilizes the capabilities of the
   network interface card to improve performance.

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 October 17, 2014.

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
   (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

Davie & Gross           Expires October 17, 2014                [Page 1]
Internet-Draft              The STT Protocol                  April 2014

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  4
     1.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  4
     1.3.  Reference Model  . . . . . . . . . . . . . . . . . . . . .  5
   2.  Design Rationale . . . . . . . . . . . . . . . . . . . . . . .  5
     2.1.  Segmentation Offload . . . . . . . . . . . . . . . . . . .  6
     2.2.  Metadata . . . . . . . . . . . . . . . . . . . . . . . . .  7
     2.3.  Context Information  . . . . . . . . . . . . . . . . . . .  7
     2.4.  Alignment  . . . . . . . . . . . . . . . . . . . . . . . .  8
     2.5.  Equal Cost Multipath . . . . . . . . . . . . . . . . . . .  8
     2.6.  Efficient Software Processing  . . . . . . . . . . . . . .  8
   3.  Frame Formats  . . . . . . . . . . . . . . . . . . . . . . . .  8
     3.1.  STT Frame Format . . . . . . . . . . . . . . . . . . . . .  9
       3.1.1.  Handling non-TCP/IP and non-UDP/IP payloads  . . . . . 12
     3.2.  Usage of TCP Header by STT . . . . . . . . . . . . . . . . 12
     3.3.  Encapsulation of STT Segments in IP  . . . . . . . . . . . 14
       3.3.1.  Diffserv and ECN-Marking . . . . . . . . . . . . . . . 14
       3.3.2.  Packet Loss  . . . . . . . . . . . . . . . . . . . . . 15
     3.4.  Broadcast and Multicast  . . . . . . . . . . . . . . . . . 15
   4.  Interoperability Issues  . . . . . . . . . . . . . . . . . . . 16
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 17
   7.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 18
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 19
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 19
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 19
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 20
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21

Davie & Gross           Expires October 17, 2014                [Page 2]
Internet-Draft              The STT Protocol                  April 2014

1.  Introduction

   Network Virtualization places unique requirements on tunneling
   protocols.  The utility of tunneling in virtualized data centers has

[include full document text]