Integrated Routing and Bridging in EVPN
draft-ietf-bess-evpn-inter-subnet-forwarding-10
| Document | Type | Active Internet-Draft (bess WG) | |
|---|---|---|---|
| Last updated | 2020-09-03 | ||
| Replaces | draft-sajassi-l2vpn-evpn-inter-subnet-forwarding | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Zhaohui Zhang | ||
| Shepherd write-up | Show (last changed 2020-07-07) | ||
| IESG | IESG state | IESG Evaluation::AD Followup | |
| Consensus Boilerplate | Yes | ||
| Telechat date |
Has 3 DISCUSSes. Needs 2 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Martin Vigoureux | ||
| Send notices to | "Zhaohui Zhang" <zzhang@juniper.net> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
BESS WorkGroup A. Sajassi
Internet-Draft S. Salam
Intended status: Standards Track S. Thoria
Expires: March 7, 2021 Cisco Systems
J. Drake
Juniper
J. Rabadan
Nokia
September 3, 2020
Integrated Routing and Bridging in EVPN
draft-ietf-bess-evpn-inter-subnet-forwarding-10
Abstract
Ethernet VPN (EVPN) provides an extensible and flexible multi-homing
VPN solution over an MPLS/IP network for intra-subnet connectivity
among Tenant Systems and End Devices that can be physical or virtual.
However, there are scenarios for which there is a need for a dynamic
and efficient inter-subnet connectivity among these Tenant Systems
and End Devices while maintaining the multi-homing capabilities of
EVPN. This document describes an Integrated Routing and Bridging
(IRB) solution based on EVPN to address such requirements.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in RFC
2119 [RFC2119] and RFC 8174 [RFC8174] when, and only when, they
appear in all capitals, as shown here.
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 https://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."
Sajassi, et al. Expires March 7, 2021 [Page 1]
Internet-Draft Integrated Routing and Bridging in EVPN September 2020
This Internet-Draft will expire on March 7, 2021.
Copyright Notice
Copyright (c) 2020 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
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described in the Simplified BSD License.
Table of Contents
1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
3. EVPN PE Model for IRB Operation . . . . . . . . . . . . . . . 6
4. Symmetric and Asymmetric IRB . . . . . . . . . . . . . . . . 7
4.1. IRB Interface and its MAC and IP addresses . . . . . . . 10
5. Symmetric IRB Procedures . . . . . . . . . . . . . . . . . . 12
5.1. Control Plane - Advertising PE . . . . . . . . . . . . . 12
5.2. Control Plane - Receiving PE . . . . . . . . . . . . . . 13
5.3. Subnet route advertisement . . . . . . . . . . . . . . . 14
5.4. Data Plane - Ingress PE . . . . . . . . . . . . . . . . . 14
5.5. Data Plane - Egress PE . . . . . . . . . . . . . . . . . 15
6. Asymmetric IRB Procedures . . . . . . . . . . . . . . . . . . 16
6.1. Control Plane - Advertising PE . . . . . . . . . . . . . 16
6.2. Control Plane - Receiving PE . . . . . . . . . . . . . . 16
6.3. Data Plane - Ingress PE . . . . . . . . . . . . . . . . . 18
6.4. Data Plane - Egress PE . . . . . . . . . . . . . . . . . 18
7. Mobility Procedure . . . . . . . . . . . . . . . . . . . . . 19
7.1. Initiating a gratutious ARP upon a Move . . . . . . . . . 20
7.2. Sending Data Traffic without an ARP Request . . . . . . . 20
7.3. Silent Host . . . . . . . . . . . . . . . . . . . . . . . 22
8. BGP Encoding . . . . . . . . . . . . . . . . . . . . . . . . 23
8.1. Router's MAC Extended Community . . . . . . . . . . . . . 23
9. Operational Models for Symmetric Inter-Subnet Forwarding . . 24
9.1. IRB forwarding on NVEs for Tenant Systems . . . . . . . . 24
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