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Geneve: Generic Network Virtualization Encapsulation
draft-gross-geneve-01

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Last updated: 2014-08-11
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Network Working Group                                           J. Gross
Internet-Draft                                                T. Sridhar
Intended status: Standards Track                                  VMware
Expires: February 12, 2015                                       P. Garg
                                                               Microsoft
                                                               C. Wright
                                                                 Red Hat
                                                                I. Ganga
                                                                   Intel
                                                         August 11, 2014

          Geneve: Generic Network Virtualization Encapsulation
                         draft-gross-geneve-01

Abstract

   Network virtualization involves the cooperation of devices with a
   wide variety of capabilities such as software and hardware tunnel
   endpoints, transit fabrics, and centralized control clusters.  As a
   result of their role in tying together different elements in the
   system, the requirements on tunnels are influenced by all of these
   components.  Flexibility is therefore the most important aspect of a
   tunnel protocol if it is keep pace with the evolution of the system.
   This draft describes Geneve, a protocol designed to recognize and
   accommodate these changing capabilities and needs.

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 February 12, 2015.

Gross, et al.           Expires February 12, 2015               [Page 1]
Internet-Draft               Geneve Protocol                 August 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
   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
   2.  Design Requirements . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Control Plane Independence  . . . . . . . . . . . . . . .   6
     2.2.  Efficient Implementation  . . . . . . . . . . . . . . . .   7
     2.3.  Use of Standard IP Fabrics  . . . . . . . . . . . . . . .   8
   3.  Geneve Encapsulation Details  . . . . . . . . . . . . . . . .   8
     3.1.  Geneve Frame Format Over IPv4 . . . . . . . . . . . . . .   9
     3.2.  Geneve Frame Format Over IPv6 . . . . . . . . . . . . . .  10
     3.3.  UDP Header  . . . . . . . . . . . . . . . . . . . . . . .  12
     3.4.  Tunnel Header Fields  . . . . . . . . . . . . . . . . . .  13
     3.5.  Tunnel Options  . . . . . . . . . . . . . . . . . . . . .  14
       3.5.1.  Options Processing  . . . . . . . . . . . . . . . . .  16
   4.  Implementation and Deployment Considerations  . . . . . . . .  16
     4.1.  Encapsulation of Geneve in IP . . . . . . . . . . . . . .  16
       4.1.1.  IP Fragmentation  . . . . . . . . . . . . . . . . . .  16
       4.1.2.  DSCP and ECN  . . . . . . . . . . . . . . . . . . . .  17
       4.1.3.  Broadcast and Multicast . . . . . . . . . . . . . . .  17
     4.2.  NIC Offloads  . . . . . . . . . . . . . . . . . . . . . .  18
     4.3.  Inner VLAN Handling . . . . . . . . . . . . . . . . . . .  19
   5.  Interoperability Issues . . . . . . . . . . . . . . . . . . .  19
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21

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