IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-11
BESS Workgroup J. Rabadan, Ed.
Internet Draft W. Henderickx
Intended status: Standards Track Nokia
J. Drake
W. Lin
Juniper
A. Sajassi
Cisco
Expires: November 19, 2018 May 18, 2018
IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-11
Abstract
The BGP MPLS-based Ethernet VPN (EVPN) [RFC7432] mechanism provides a
flexible control plane that allows intra-subnet connectivity in an
MPLS and/or NVO (Network Virtualization Overlay) [RFC7365] network.
In some networks, there is also a need for a dynamic and efficient
inter-subnet connectivity across Tenant Systems and End Devices that
can be physical or virtual and do not necessarily participate in
dynamic routing protocols. This document defines a new EVPN route
type for the advertisement of IP Prefixes and explains some use-case
examples where this new route-type is used.
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), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
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."
The list of current Internet-Drafts can be accessed at
Rabadan et al. Expires November 19, 2018 [Page 1]
Internet-Draft EVPN Prefix Advertisement May 18, 2018
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on November 19, 2018.
Copyright Notice
Copyright (c) 2018 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Inter-Subnet Connectivity Requirements in Data Centers . . . 5
2.2 The Need for the EVPN IP Prefix Route . . . . . . . . . . . 8
3. The BGP EVPN IP Prefix Route . . . . . . . . . . . . . . . . . 10
3.1 IP Prefix Route Encoding . . . . . . . . . . . . . . . . . . 11
3.2 Overlay Indexes and Recursive Lookup Resolution . . . . . . 13
4. Overlay Index Use-Cases . . . . . . . . . . . . . . . . . . . . 15
4.1 TS IP Address Overlay Index Use-Case . . . . . . . . . . . . 16
4.2 Floating IP Overlay Index Use-Case . . . . . . . . . . . . . 18
4.3 Bump-in-the-Wire Use-Case . . . . . . . . . . . . . . . . . 20
4.4 IP-VRF-to-IP-VRF Model . . . . . . . . . . . . . . . . . . . 23
4.4.1 Interface-less IP-VRF-to-IP-VRF Model . . . . . . . . . 24
4.4.2 Interface-ful IP-VRF-to-IP-VRF with SBD IRB . . . . . . 27
4.4.3 Interface-ful IP-VRF-to-IP-VRF with Unnumbered SBD IRB . 30
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 33
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 33
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.1 Normative References . . . . . . . . . . . . . . . . . . . . 34
7.2 Informative References . . . . . . . . . . . . . . . . . . . 34
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 35
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 35
10. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 36
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