BFD for Geneve
draft-xiao-bfd-geneve-00

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Last updated 2018-11-23
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BFD Working Group                                                 X. Min
Internet-Draft                                                 G. Mirsky
Intended status: Standards Track                                     ZTE
Expires: May 27, 2019                                  November 23, 2018

                             BFD for Geneve
                        draft-xiao-bfd-geneve-00

Abstract

   This document describes the use of the Bidirectional Forwarding
   Detection (BFD) protocol in Generic Network Virtualization
   Encapsulation (Geneve) overlay networks.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 27, 2019.

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   Copyright (c) 2018 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
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions Used in This Document . . . . . . . . . . . .   2
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   2
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   3
   2.  BFD Packet Transmission over Geneve Tunnel  . . . . . . . . .   3
     2.1.  BFD Packet Encapsulation in Geneve  . . . . . . . . . . .   3
       2.1.1.  BFD Encapsulation With IP/UDP Header  . . . . . . . .   3
       2.1.2.  BFD Encapsulation Without IP/UDP Header . . . . . . .   5
   3.  Reception of BFD packet from Geneve Tunnel  . . . . . . . . .   7
     3.1.  Demultiplexing of the BFD packet  . . . . . . . . . . . .   8
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   "Generic Network Virtualization Encapsulation" (Geneve)
   [I-D.ietf-nvo3-geneve] provides a generic tunneling protocol that is
   applicable to many scenarios, including an encapsulation scheme that
   allows virtual machines (VMs) to communicate in a data center
   network.

   This document describes the use of Bidirectional Forwarding Detection
   (BFD) protocol for Geneve to enable monitoring continuity of the path
   between Network Virtualization Edges (NVEs) and/or availability of a
   replicator service node using BFD.

   The use cases and the deployment of BFD for Geneve are consistent
   with what's described in Section 3 and Section 4 of
   [I-D.ietf-bfd-vxlan].  The main difference between Geneve and
   "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348]
   encapsulation is that Geneve supports multi-protocol payload and
   variable length options.

1.1.  Conventions Used in This Document

1.1.1.  Terminology

   BFD: Bidirectional Forwarding Detection

   Geneve: Generic Network Virtualization Encapsulation

   NVE: Network Virtualization Edge

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   VFI: Virtual Forwarding Instance

   VM: Virtual Machine

   VNI: Virtual Network Identifier

   VXLAN: Virtual eXtensible Local Area Network

1.1.2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.
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