BFD for VXLAN
draft-ietf-bfd-vxlan-03

Document Type Active Internet-Draft (bfd WG)
Last updated 2018-10-08
Replaces draft-spallagatti-bfd-vxlan
Stream IETF
Intended RFC status (None)
Formats plain text xml pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
Internet Engineering Task Force                       S. Pallagatti, Ed.
Internet-Draft                                                   Rtbrick
Intended status: Standards Track                             S. Paragiri
Expires: April 11, 2019                                 Juniper Networks
                                                             V. Govindan
                                                            M. Mudigonda
                                                                   Cisco
                                                               G. Mirsky
                                                               ZTE Corp.
                                                         October 8, 2018

                             BFD for VXLAN
                        draft-ietf-bfd-vxlan-03

Abstract

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

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 https://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 April 11, 2019.

Copyright Notice

   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
   Provisions Relating to IETF Documents
   (https://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

Pallagatti, et al.       Expires April 11, 2019                 [Page 1]
Internet-Draft                BFD for VXLAN                 October 2018

   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  . . . . . . . . . . . . . . . . . . . . . . . .   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  . . . . . . . . . . . .   7
   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  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348].  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/overlays
   are overlaid on top of Layer 3 network.

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

   Ability to monitor path continuity, i.e., perform proactive
   continuity check (CC) for these tunnels, is important.  The
   asynchronous mode of BFD, as defined in [RFC5880], can be used to

Pallagatti, et al.       Expires April 11, 2019                 [Page 2]
Show full document text