A Framework for Multicast in Network Virtualization over Layer 3
RFC 8293
Internet Engineering Task Force (IETF) A. Ghanwani
Request for Comments: 8293 Dell
Category: Informational L. Dunbar
ISSN: 2070-1721 M. McBride
Huawei
V. Bannai
Google
R. Krishnan
Dell
January 2018
A Framework for Multicast in Network Virtualization over Layer 3
Abstract
This document provides a framework for supporting multicast traffic
in a network that uses Network Virtualization over Layer 3 (NVO3).
Both infrastructure multicast and application-specific multicast are
discussed. It describes the various mechanisms that can be used for
delivering such traffic as well as the data plane and control plane
considerations for each of the mechanisms.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8293.
Ghanwani, et al. Informational [Page 1]
RFC 8293 A Framework for Multicast in NVO3 January 2018
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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Infrastructure Multicast . . . . . . . . . . . . . . . . 3
1.2. Application-Specific Multicast . . . . . . . . . . . . . 4
2. Terminology and Abbreviations . . . . . . . . . . . . . . . . 4
3. Multicast Mechanisms in Networks That Use NVO3 . . . . . . . 5
3.1. No Multicast Support . . . . . . . . . . . . . . . . . . 6
3.2. Replication at the Source NVE . . . . . . . . . . . . . . 6
3.3. Replication at a Multicast Service Node . . . . . . . . . 8
3.4. IP Multicast in the Underlay . . . . . . . . . . . . . . 10
3.5. Other Schemes . . . . . . . . . . . . . . . . . . . . . . 11
4. Simultaneous Use of More Than One Mechanism . . . . . . . . . 12
5. Other Issues . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1. Multicast-Agnostic NVEs . . . . . . . . . . . . . . . . . 12
5.2. Multicast Membership Management for DC with VMs . . . . . 13
6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1. Normative References . . . . . . . . . . . . . . . . . . 13
9.2. Informative References . . . . . . . . . . . . . . . . . 14
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
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RFC 8293 A Framework for Multicast in NVO3 January 2018
1. Introduction
Network Virtualization over Layer 3 (NVO3) [RFC7365] is a technology
that is used to address issues that arise in building large, multi-
tenant data centers (DCs) that make extensive use of server
virtualization [RFC7364].
This document provides a framework for supporting multicast traffic
in a network that uses NVO3. Both infrastructure multicast and
application-specific multicast are considered. It describes various
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