IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-05
BESS Workgroup J. Rabadan, Ed.
Internet Draft W. Henderickx
Intended status: Standards Track Nokia
J. Drake
W. Lin
Juniper
A. Sajassi
Cisco
Expires: January 19, 2018 July 18, 2017
IP Prefix Advertisement in EVPN
draft-ietf-bess-evpn-prefix-advertisement-05
Abstract
EVPN provides a flexible control plane that allows intra-subnet
connectivity in an IP/MPLS and/or an 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
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
http://www.ietf.org/ietf/1id-abstracts.txt
Rabadan et al. Expires January 19, 2018 [Page 1]
Internet-Draft EVPN Prefix Advertisement July 18, 2017
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on January 19, 2018.
Copyright Notice
Copyright (c) 2017 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
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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. IP Prefix 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 core-facing IRB . . 24
4.4.3 Interface-ful IP-VRF-to-IP-VRF with unnumbered
core-facing 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
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