BFD for VXLAN
draft-spallagatti-bfd-vxlan-00

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Last updated 2015-05-04
Replaced by draft-ietf-bfd-vxlan
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Internet Engineering Task Force                       S. Pallagatti, Ed.
Internet-Draft                                               S. Paragiri
Intended status: Standards Track                                 B. Saji
Expires: November 5, 2015                               Juniper Networks
                                                             May 4, 2015

                             BFD for VXLAN
                     draft-spallagatti-bfd-vxlan-00

Abstract

   This document describes use of Bidirectional Forwarding Detection
   (BFD) protocol for VXLAN . Comments on this draft should be directed
   to nvo3@ietf.org.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on November 5, 2015.

Copyright Notice

   Copyright (c) 2015 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

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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Deployment  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Packet Format . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Transmission of BFD Packet: . . . . . . . . . . . . . . . . .   6
   6.  Reception of BFD Packet:  . . . . . . . . . . . . . . . . . .   7
     6.1.  Demux of BFD Packet:  . . . . . . . . . . . . . . . . . .   7
   7.  Echo BFD: . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   8.  S-BFD:  . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Transmission of S-BFD:  . . . . . . . . . . . . . . . . .   8
     8.2.  Reception of S-BFD: . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   8
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   12. Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   "Virtual eXtensible Local Area Network (VXLAN)" has been defined in
   [RFC7348] that provides an encapsulation scheme which allows VM's to
   communicate in data centre network.

   VXLAN is typically deployed in data centres on virtualized hosts,
   which may be spread across multiple racks.  The individual racks may
   be parts 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 a VM in other host only if they are on same
   VXLAN.  VM's are unaware of VXLAN tunnels as VXLAN tunnel terminates
   on VTEP (hypervisor/TOR).  VETP (hypervisor/TOR) are responsible for
   encapsulating and decapsulating frames sent from VM's.

   Since underlay is a L3 network connectivity check for these tunnels
   becomes important.  BFD as defined in [RFC5880] can be used to
   monitor the VXLAN tunnels.

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2.  Use cases

   Main use case of BFD for VXLAN is for tunnel connectivity check.
   There are other use cases such as
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