RFC 8365 - A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN)

Abstract

This document specifies how Ethernet VPN (EVPN) can be used as a Network Virtualization Overlay (NVO) solution and explores the various tunnel encapsulation options over IP and their impact on the EVPN control plane and procedures. In particular, the following encapsulation options are analyzed: Virtual Extensible LAN (VXLAN), Network Virtualization using Generic Routing Encapsulation (NVGRE), and MPLS over GRE. This specification is also applicable to Generic Network Virtualization Encapsulation (GENEVE); however, some incremental work is required, which will be covered in a separate document. This document also specifies new multihoming procedures for split-horizon filtering and mass withdrawal. It also specifies EVPN route constructions for VXLAN/NVGRE encapsulations and Autonomous System Border Router (ASBR) procedures for multihoming of Network Virtualization Edge (NVE) devices.

Status of This Memo

This is an Internet Standards Track document.

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). Further information on Internet Standards is available in 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/rfc8365.

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 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 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.

Contents

• 1. Introduction
• 2. Requirements Notation and Conventions
• 3. Terminology
• 4. EVPN Features
• 5. Encapsulation Options for EVPN Overlays
  • 5.1. VXLAN/NVGRE Encapsulation
  • 5.2. MPLS over GRE
• 6. EVPN with Multiple Data-Plane Encapsulations
• 7. Single-Homing NVEs - NVE Residing in Hypervisor
  • 7.1. Impact on EVPN BGP Routes & Attributes for VXLAN/NVGRE
  • 7.2. Impact on EVPN Procedures for VXLAN/NVGRE Encapsulations
• 8. Multihoming NVEs - NVE Residing in ToR Switch
  • 8.1. EVPN Multihoming Features
  • 8.2. Impact on EVPN BGP Routes and Attributes
  • 8.3. Impact on EVPN Procedures
• 9. Support for Multicast
• 10. Data-Center Interconnections (DCIs)
  • 10.1. DCI Using GWs
  • 10.2. DCI Using ASBRs
• 11. Security Considerations
• 12. IANA Considerations
• 13. References
  • 13.1. Normative References
  • 13.2. Informative References
• Acknowledgements
• Contributors
• Authors' Addresses