Extended Procedures for EVPN Optimized Ingress Replication
draft-ietf-bess-extended-evpn-optimized-ir-00
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BESS W. Lin, Ed.
Internet-Draft S. Sivaraj
Intended status: Standards Track V. Garg
Expires: August 22, 2020 Juniper Networks, Inc.
J. Rabadan
Nokia
February 19, 2020
Extended Procedures for EVPN Optimized Ingress Replication
draft-ietf-bess-extended-evpn-optimized-ir-00
Abstract
[EVPN-AR] specifies an optimized ingress replication solution for
more efficient multicast and broadcast delivery in a Network
Virtualization Overlay (NVO) network for EVPN.
This document extends the optimized ingress replication procedures
specified in [EVPN-AR] to overcome the limitation that an AR-
REPLICATOR may have. An AR-REPLICATOR may be unable to retain the
source IP address or include the expected ESI label that is required
for EVPN split horizon filtering when replicating the packet on
behalf of its multihomed AR-LEAF. Under this circumstance, the
extended procedures specified in this document allows the support of
EVPN multihoming on the AR-LEAFs as well as optimized ingress
replication for the rest of the EVPN overlay network.
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 BCP
14 [RFC2119] [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
Lin, et al. Expires August 22, 2020 [Page 1]
Internet-Draft extended-evpn-optimized-ir February 2020
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 August 22, 2020.
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
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.
Table of Contents
1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Background . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1. EVPN Multihoming and Split Horizon Filtering Rule . . 3
2.2. Optimized-IR and the Need to Maintain the Original Source
IP address or Include the ESI Label . . . . . . . . . . . 4
3. Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. AR-REPLICATOR Announcing Multihoming Assistant Capability
for Optimized-IR . . . . . . . . . . . . . . . . . . . . 5
3.2. Multihomed AR-LEAF and Extended-MH AR-REPLICATOR . . . . 6
3.3. The Benefit of the Extended Optimized-IR Procedure . . . 7
3.4. Support for Mixed AR-REPLICATORs . . . . . . . . . . . . 7
4. Extended Optimized-IR Procedure for Supporting Extended-MH
AR-REPLICATOR . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1. AR-LEAF Procedure . . . . . . . . . . . . . . . . . . . . 8
4.1.1. Control Plane Procedure for AR-LEAF . . . . . . . . . 8
4.1.2. Forwarding Procedure for AR-LEAF . . . . . . . . . . 9
4.2. AR-REPLICATOR Procedure . . . . . . . . . . . . . . . . . 9
4.2.1. Control Plane Procedure for AR-REPLICATOR . . . . . . 9
4.2.2. Forwarding Procedure for AR-REPLICATOR . . . . . . . 10
4.3. RNVE Procedure . . . . . . . . . . . . . . . . . . . . . 10
5. AR-LEAF's Peer multihomed NVE in the Extended Optimized-IR
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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