BFD for Geneve
draft-xiao-nvo3-bfd-geneve-02
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NVO3 Working Group X. Min
Internet-Draft G. Mirsky
Intended status: Standards Track ZTE Corp.
Expires: August 20, 2020 S. Pallagatti
VMware
February 17, 2020
BFD for Geneve
draft-xiao-nvo3-bfd-geneve-02
Abstract
This document describes the use of the Bidirectional Forwarding
Detection (BFD) protocol in point-to-point Generic Network
Virtualization Encapsulation (Geneve) tunnels used to make 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 August 20, 2020.
Copyright Notice
Copyright (c) 2020 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
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
Min, et al. Expires August 20, 2020 [Page 1]
Internet-Draft BFD for Geneve February 2020
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. 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 . . . . . . . 6
4. Reception of BFD packet from Geneve Tunnel . . . . . . . . . 8
4.1. Demultiplexing of the BFD packet . . . . . . . . . . . . 8
5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.1. Normative References . . . . . . . . . . . . . . . . . . 10
8.2. Informative References . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 11
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. Specifically, the asynchronous mode of BFD, as defined in
[RFC5880], is used to monitor a p2p Geneve tunnel, and support for
echo BFD is outside the scope of this document. For simplicity, in
this document, NVE is used to represent Geneve tunnel endpoint, TS
(Tenant System) is used to represent the physical or virtual device
attached to a Geneve tunnel endpoint from the outside. VAP (Virtual
Access Point) is the NVE side of the interface between the NVE and
the TS, and a VAP is a logical network port (virtual or physical)
into a specific virtual network. For detailed definitions and
descriptions of NVE, TS and VAP, please refer to [RFC7365] and
[RFC8014].
The use cases and the deployment of BFD for Geneve are consistent
with what's described in Section 1 and 3 of [I-D.ietf-bfd-vxlan].
The major difference between Geneve and "Virtual eXtensible Local
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