Multi-site EVPN based VXLAN using Border Gateways
draft-sharma-multi-site-evpn-03
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2017-07-17
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Internet Engineering Task Force R. Sharma, Ed.
Internet-Draft A. Banerjee
Intended status: Standards Track R. Sivaramu
Expires: January 18, 2018 A. Sajassi
Cisco Systems
July 17, 2017
Multi-site EVPN based VXLAN using Border Gateways
draft-sharma-multi-site-evpn-03
Abstract
This document describes the procedures for interconnecting two or
more BGP based Ethernet VPN (EVPN) sites in a scalable fashion over
an IP-only network. The motivation is to support extension of EVPN
sites without having to rely on typical Data Center Interconnect
(DCI) technologies like MPLS/VPLS for the interconnection. The
requirements for such a deployment are very similar to the ones
specified in RFC 7209 -- "Requirements for Ethernet VPN (EVPN)".
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 18, 2018.
Copyright Notice
Copyright (c) 2017 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
(http://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
Sharma, et al. Expires January 18, 2018 [Page 1]
Internet-Draft Multi-site EVPN July 2017
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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Multi-Site EVPN Overview . . . . . . . . . . . . . . . . . . 4
3.1. MS-EVPN Interconnect Requirements . . . . . . . . . . . . 4
3.2. MS-EVPN Interconnect concept and framework . . . . . . . 5
4. Multi-site EVPN Interconnect Procedures . . . . . . . . . . . 8
4.1. Border Gateway Discovery . . . . . . . . . . . . . . . . 8
4.2. Border Gateway Provisioning . . . . . . . . . . . . . . . 11
4.2.1. Border Gateway Designated Forwarder Election . . . . 11
4.2.2. Anycast Border Gateway . . . . . . . . . . . . . . . 12
4.2.3. Multi-path Border Gateway . . . . . . . . . . . . . . 12
4.3. EVPN route processing at Border Gateway . . . . . . . . . 13
4.4. Multi-Destination tree between Border Gateways . . . . . 14
4.5. Inter-site Unicast traffic . . . . . . . . . . . . . . . 15
4.6. Inter-site Multi-destination traffic . . . . . . . . . . 15
4.7. Host Mobility . . . . . . . . . . . . . . . . . . . . . . 16
5. Convergence . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1. Fabric to Border Gateway Failure . . . . . . . . . . . . 16
5.2. Border Gateway to Border Gateway Failures . . . . . . . . 16
6. Interoperability . . . . . . . . . . . . . . . . . . . . . . 16
7. Isolation of Fault Domains . . . . . . . . . . . . . . . . . 17
8. Loop detection and Prevention . . . . . . . . . . . . . . . . 17
9. MVPN with Multi-site EVPN . . . . . . . . . . . . . . . . . . 18
9.1. Inter-Site MI-PMSI . . . . . . . . . . . . . . . . . . . 18
9.2. Stitching of customer multicast trees across sites . . . 18
9.3. RPF resolution in Anycast Border Gateway model . . . . . 19
9.4. Inter-Site S-PMSI . . . . . . . . . . . . . . . . . . . . 19
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 19
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
12. Security Considerations . . . . . . . . . . . . . . . . . . . 19
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