BFD for Geneve
draft-ietf-nvo3-bfd-geneve-00
NVO3 Working Group X. Min
Internet-Draft G. Mirsky
Intended status: Standards Track ZTE Corp.
Expires: May 19, 2021 S. Pallagatti
VMware
J. Tantsura
Apstra
November 15, 2020
BFD for Geneve
draft-ietf-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 used to make up an
overlay network.
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This Internet-Draft will expire on May 19, 2021.
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Min, et al. Expires May 19, 2021 [Page 1]
Internet-Draft BFD for Geneve November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . 3
2.1. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . 9
5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
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
BFD Echo function 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
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