BFD for Geneve
draft-xiao-nvo3-bfd-geneve-00
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2019-07-08
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draft-xiao-bfd-geneve
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NVO3 Working Group X. Min
Internet-Draft G. Mirsky
Intended status: Informational ZTE
Expires: January 9, 2020 July 8, 2019
BFD for Geneve
draft-xiao-nvo3-bfd-geneve-00
Abstract
This document describes the use of the Bidirectional Forwarding
Detection (BFD) protocol in point-to-point Generic Network
Virtualization Encapsulation (Geneve) tunnels forming up an overlay
network.
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 January 9, 2020.
Copyright Notice
Copyright (c) 2019 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
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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.
Min & Mirsky Expires January 9, 2020 [Page 1]
Internet-Draft BFD for Geneve July 2019
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . 2
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2
2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. BFD Packet Transmission over Geneve Tunnel . . . . . . . . . 3
3.1. BFD Encapsulation With Inner Ethernet/IP/UDP Header . . . 3
3.2. BFD Encapsulation With Inner IP/UDP Header . . . . . . . 5
3.3. BFD Encapsulation With Inner MPLS Header . . . . . . . . 7
3.4. BFD Encapsulation With Inner OAM Shim . . . . . . . . . . 9
4. Reception of BFD packet from Geneve Tunnel . . . . . . . . . 10
4.1. Demultiplexing of the BFD packet . . . . . . . . . . . . 11
5. Security Considerations . . . . . . . . . . . . . . . . . . . 12
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
8. Normative References . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
"Generic Network Virtualization Encapsulation" (Geneve)
[I-D.ietf-nvo3-geneve] provides an encapsulation scheme that allows
building an overlay network by decoupling the address space of the
attached virtual hosts from that of the network.
This document describes the use of Bidirectional Forwarding Detection
(BFD) protocol [RFC5880] to enable monitoring continuity of the path
between two Geneve tunnel endpoints, which may be NVE (Network
Virtualization Edge) or other device acting as a Geneve tunnel
endpoint. For simplicity, in this document, NVE is used to represent
Geneve tunnel endpoint, Virtual Machine (VM) is used to represent the
device attached to a Geneve tunnel endpoint from the outside.
The use cases and the deployment of BFD for Geneve are consistent
with what's described in Section 1 and Section 3 of
[I-D.ietf-bfd-vxlan]. The major difference between Geneve and
"Virtual eXtensible Local Area Network" (VXLAN) [RFC7348]
encapsulation is that Geneve supports multi-protocol payload and
variable length options.
2. Conventions Used in This Document
2.1. Terminology
BFD: Bidirectional Forwarding Detection
CC: Continuity Check
Min & Mirsky Expires January 9, 2020 [Page 2]
Internet-Draft BFD for Geneve July 2019
GAL: Generic Associated Channel Label
G-ACh: Generic Associated Channel
Geneve: Generic Network Virtualization Encapsulation
MPLS: Multiprotocol Label Switching
NVE: Network Virtualization Edge
VM: Virtual Machine
VNI: Virtual Network Identifier
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