AC-Aware Bundling Service Interface in EVPN
draft-sajassi-bess-evpn-ac-aware-bundling-02
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2020-08-18
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BESS WorkGroup A. Sajassi
Internet-Draft M. Mishra
Intended status: Standards Track S. Thoria
Expires: February 19, 2021 P. Brissette
Cisco Systems
J. Rabadan
Nokia
J. Drake
Juniper Networks
August 18, 2020
AC-Aware Bundling Service Interface in EVPN
draft-sajassi-bess-evpn-ac-aware-bundling-02
Abstract
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.
EVPN multihoming with IRB is one of the common deployment scenarios.
There are deployments which requires capability to have multiple
subnets designated with multiple VLAN IDs in single bridge domain.
[RFC7432] defines three different type of service interface which
serve different requirements but none of them address the requirement
to be able to support multiple subnets within single bridge domain.
In this draft we define new service interface type to support
multiple subnets in single bridge domain. Service interface proposed
in this draft will be applicable to multihoming case only.
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."
This Internet-Draft will expire on February 19, 2021.
Sajassi, et al. Expires February 19, 2021 [Page 1]
Internet-Draft AC-Aware Bundling Service Interface in EVPN August 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Problem with Unicast MAC route processing for multihome
case . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2. Problem with Multicast route synchronization . . . . . . 6
1.3. Potential Security concern caused by misconfiguration . . 6
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Solution Description . . . . . . . . . . . . . . . . . . . . 9
4.1. Control Plane Operation . . . . . . . . . . . . . . . . . 11
4.1.1. MAC/IP Address Advertisement . . . . . . . . . . . . 11
4.1.1.1. Local Unicast MAC learning . . . . . . . . . . . 11
4.1.1.2. Remote Unicast MAC learning . . . . . . . . . . . 11
4.1.2. Multicast route Advertisement . . . . . . . . . . . . 11
4.1.2.1. Local multicast state . . . . . . . . . . . . . . 11
4.1.2.2. Remote multicast state . . . . . . . . . . . . . 12
4.2. Data Plane Operation . . . . . . . . . . . . . . . . . . 12
4.2.1. Unicast Forwarding . . . . . . . . . . . . . . . . . 12
4.2.2. Multicast Forwarding . . . . . . . . . . . . . . . . 13
5. Mis-configuration of VLAN ranges across multihoming peer . . 13
6. BGP Encoding . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1. Attachment Circuit ID Extended Community . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 14
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
9. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 14
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