BFD for VXLAN
draft-spallagatti-bfd-vxlan-06

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Internet Engineering Task Force                       S. Pallagatti, Ed.
Internet-Draft                                   Independent Contributor
Intended status: Standards Track                             S. Paragiri
Expires: April 16, 2018                                 Juniper Networks
                                                             V. Govindan
                                                            M. Mudigonda
                                                                   Cisco
                                                               G. Mirsky
                                                               ZTE Corp.
                                                        October 13, 2017

                             BFD for VXLAN
                     draft-spallagatti-bfd-vxlan-06

Abstract

   This document describes use of Bidirectional Forwarding Detection
   (BFD) protocol in Virtual eXtensible Local Area Network (VXLAN)
   overlay network.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 16, 2018.

Copyright Notice

   Copyright (c) 2017 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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   (https://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect

Pallagatti, et al.       Expires April 16, 2018                 [Page 1]
Internet-Draft                BFD for VXLAN                 October 2017

   to this document.  Code Components extracted from this document must
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Deployment  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  BFD Packet Transmission over VXLAN Tunnel . . . . . . . . . .   5
     5.1.  BFD Packet Encapsulation in VXLAN . . . . . . . . . . . .   6
   6.  Reception of BFD packet from VXLAN Tunnel . . . . . . . . . .   7
     6.1.  Demultiplexing of the BFD packet  . . . . . . . . . . . .   8
   7.  Use of reserved VNI . . . . . . . . . . . . . . . . . . . . .   8
   8.  Echo BFD  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   8
   11. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   8
   12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   9
   13. Normative References  . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   "Virtual eXtensible Local Area Network (VXLAN)" has been described in
   [RFC7348].  VXLAN provides an encapsulation scheme that allows
   virtual machines (VMs) to communicate in a data center network.

   VXLAN is typically deployed in data centers interconnecting
   virtualized hosts, which may be spread across multiple racks.  The
   individual racks may be part of a different Layer 3 network or they
   could be in a single Layer 2 network.  The VXLAN segments/overlay
   networks are overlaid on top of these Layer 2 or Layer 3 networks.

   A VM can communicate with another VM only if they are on the same
   VXLAN.  VMs are unaware of VXLAN tunnels as VXLAN tunnel is
   terminated on VXLAN Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs
   (hypervisor/TOR) are responsible for encapsulating and decapsulating
   frames exchanged among VMs.

   Since underlay is a L3 network, ability to monitor path continuity,
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