IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-08
BESS Workgroup J. Rabadan, Ed.
Internet Draft W. Henderickx
Intended status: Standards Track Nokia
J. Drake
W. Lin
Juniper
A. Sajassi
Cisco
Expires: April 23, 2018 October 20, 2017
IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-08
Abstract
EVPN provides a flexible control plane that allows intra-subnet
connectivity in an MPLS and/or NVO-based 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-
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Internet-Drafts are draft documents valid for a maximum of six months
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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
http://www.ietf.org/ietf/1id-abstracts.txt
Rabadan et al. Expires April 23, 2018 [Page 1]
Internet-Draft EVPN Prefix Advertisement October 20, 2017
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on April 23, 2018.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Introduction and Problem Statement . . . . . . . . . . . . . . 4
2.1 Inter-Subnet Connectivity Requirements in Data Centers . . . 4
2.2 The Requirement for a New EVPN Route Type . . . . . . . . . 7
3. The BGP EVPN IP Prefix Route . . . . . . . . . . . . . . . . . 8
3.1 IP Prefix Route Encoding . . . . . . . . . . . . . . . . . . 9
3.2 Overlay Indexes and Recursive Lookup Resolution . . . . . . 10
4. Overlay Index Use-Cases . . . . . . . . . . . . . . . . . . . . 13
4.1 TS IP Address Overlay Index Use-Case . . . . . . . . . . . . 13
4.2 Floating IP Overlay Index Use-Case . . . . . . . . . . . . . 15
4.3 Bump-in-the-Wire Use-Case . . . . . . . . . . . . . . . . . 17
4.4 IP-VRF-to-IP-VRF Model . . . . . . . . . . . . . . . . . . . 20
4.4.1 Interface-less IP-VRF-to-IP-VRF Model . . . . . . . . . 21
4.4.2 Interface-ful IP-VRF-to-IP-VRF with SBD IRB . . . . . . 24
4.4.3 Interface-ful IP-VRF-to-IP-VRF with Unnumbered SBD IRB . 27
5. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6. Conventions used in this document . . . . . . . . . . . . . . . 31
7. Security Considerations . . . . . . . . . . . . . . . . . . . . 31
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 31
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.1 Normative References . . . . . . . . . . . . . . . . . . . . 31
9.2 Informative References . . . . . . . . . . . . . . . . . . . 31
10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 32
11. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 32
12. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 32
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