EVPN Inter-subnet Multicast Forwarding
draft-lin-bess-evpn-irb-mcast-03
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BESS W. Lin
Internet-Draft Z. Zhang
Intended status: Standards Track J. Drake
Expires: September 14, 2017 Juniper Networks, Inc.
J. Rabadan
Nokia
A. Sajassi
Cisco Systems
March 13, 2017
EVPN Inter-subnet Multicast Forwarding
draft-lin-bess-evpn-irb-mcast-03
Abstract
This document describes inter-subnet multicast forwarding procedures
for Ethernet VPNs (EVPN). This includes forwarding inside an EVN
domain and to/from outside the EVPN domain.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC2119.
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 September 14, 2017.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
Lin, et al. Expires September 14, 2017 [Page 1]
Internet-Draft evpn-irb-mcast March 2017
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
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to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Background and Terminologies . . . . . . . . . . . . . . 3
1.1.1. Integrated Routing and Bridging . . . . . . . . . . . 3
1.1.2. General Multicast Routing . . . . . . . . . . . . . . 4
1.2. Inter-subnet Multicast in EVPN . . . . . . . . . . . . . 5
2. EVPN-aware Solution . . . . . . . . . . . . . . . . . . . . . 7
2.1. Basic Operations . . . . . . . . . . . . . . . . . . . . 7
2.2. Multi-homing Support . . . . . . . . . . . . . . . . . . 8
2.3. Receiver NVEs not connected to a source subnet . . . . . 9
2.3.1. IMET routes advertisement . . . . . . . . . . . . . . 10
2.3.2. Layer 2 Forwarding State . . . . . . . . . . . . . . 11
2.3.3. Layer 3 Forwarding State . . . . . . . . . . . . . . 12
2.4. Selective Multicast . . . . . . . . . . . . . . . . . . . 12
2.5. Advanced Topics . . . . . . . . . . . . . . . . . . . . . 14
2.5.1. Legacy NVEs . . . . . . . . . . . . . . . . . . . . . 14
2.5.2. Traffic to/from outside of an EVPN domain . . . . . . 15
2.5.3. Integration with MVPN . . . . . . . . . . . . . . . . 17
2.5.4. When Tenant Routers Are Present . . . . . . . . . . . 19
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20
4. Security Considerations . . . . . . . . . . . . . . . . . . . 21
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 21
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1. Normative References . . . . . . . . . . . . . . . . . . 21
6.2. Informative References . . . . . . . . . . . . . . . . . 21
Appendix A. Integrated Routing and Bridging . . . . . . . . . . 23
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 24
1. Introduction
EVPN offers an efficient L2 VPN solution with all-active multi-homing
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