IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-04
BESS Workgroup J. Rabadan, Ed.
Internet Draft W. Henderickx
Intended status: Standards Track Nokia
J. Drake
W. Lin
Juniper
A. Sajassi
Cisco
Expires: August 17, 2017 February 13, 2017
IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-04
Abstract
EVPN provides a flexible control plane that allows intra-subnet
connectivity in an IP/MPLS and/or an NVO-based network. In NVO
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 may not support their own 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
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The list of current Internet-Drafts can be accessed at
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Rabadan et al. Expires August 17, 2017 [Page 1]
Internet-Draft EVPN Prefix Advertisement February 13, 2017
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on August 17, 2017.
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 . . . . . . . . . . . . . . 3
2.1 Inter-subnet connectivity requirements in Data Centers . . . 4
2.2 The requirement for a new EVPN route type . . . . . . . . . 6
3. The BGP EVPN IP Prefix route . . . . . . . . . . . . . . . . . 8
3.1 IP Prefix Route encoding . . . . . . . . . . . . . . . . . . 8
4. Benefits of using the EVPN IP Prefix route . . . . . . . . . . 10
5. IP Prefix overlay index use-cases . . . . . . . . . . . . . . . 11
5.1 TS IP address overlay index use-case . . . . . . . . . . . . 11
5.2 Floating IP overlay index use-case . . . . . . . . . . . . . 14
5.3 ESI overlay index ("Bump in the wire") use-case . . . . . . 15
5.4 IP-VRF-to-IP-VRF model . . . . . . . . . . . . . . . . . . . 18
5.4.1 Interface-less IP-VRF-to-IP-VRF model . . . . . . . . . 19
5.4.2 Interface-full IP-VRF-to-IP-VRF with core-facing IRB . . 22
5.4.3 Interface-full IP-VRF-to-IP-VRF with unnumbered
core-facing IRB . . . . . . . . . . . . . . . . . . . . 24
6. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7. Conventions used in this document . . . . . . . . . . . . . . . 28
8. Security Considerations . . . . . . . . . . . . . . . . . . . . 28
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 28
10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.1 Normative References . . . . . . . . . . . . . . . . . . . 29
10.2 Informative References . . . . . . . . . . . . . . . . . . 29
11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 29
12. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 29
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