BGP ACCEPT_OWN Community Attribute
RFC 7611
Internet Engineering Task Force (IETF) J. Uttaro
Request for Comments: 7611 AT&T
Category: Standards Track P. Mohapatra
ISSN: 2070-1721 Sproute Networks
D. Smith
Cisco Systems
R. Raszuk
Mirantis Inc.
J. Scudder
Juniper Networks
August 2015
BGP ACCEPT_OWN Community Attribute
Abstract
Under certain conditions, it is desirable for a Border Gateway
Protocol (BGP) route reflector to be able to modify the Route Target
(RT) list of a Virtual Private Network (VPN) route that the route
reflector distributes, enabling the route reflector to control how a
route originated within one VPN Routing and Forwarding table (VRF) is
imported into other VRFs. This technique works effectively as long
as the VRF that exports the route is not on the same Provider Edge
(PE) router as the VRF(s) that imports the route. However, due to
the constraints of BGP, it does not work if the two are on the same
PE. This document describes a modification to BGP allowing this
technique to work when the VRFs are on the same PE and to be used in
a standard manner throughout an autonomous system.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7611.
Uttaro, et al. Standards Track [Page 1]
RFC 7611 ACCEPT_OWN August 2015
Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. ACCEPT_OWN Community . . . . . . . . . . . . . . . . . . . . 3
2.1. Route Acceptance . . . . . . . . . . . . . . . . . . . . 3
2.2. Propagating ACCEPT_OWN between Address Families . . . . . 4
2.3. Configuration Control . . . . . . . . . . . . . . . . . . 4
3. Decision Process . . . . . . . . . . . . . . . . . . . . . . 4
4. Deployment Considerations . . . . . . . . . . . . . . . . . . 5
5. Other Applications . . . . . . . . . . . . . . . . . . . . . 5
6. Security Considerations . . . . . . . . . . . . . . . . . . . 5
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1. Normative References . . . . . . . . . . . . . . . . . . 6
8.2. Informative References . . . . . . . . . . . . . . . . . 6
Appendix A. Local Extranet Application (Non-normative) . . . . . 7
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
In certain scenarios, a BGP speaker may maintain multiple VRFs
[RFC4364]. Under certain conditions, it is desirable for a route
reflector to be able to modify the RT list of a VPN route that the
route reflector distributes, enabling the route reflector to control
how a route originated within one VRF is imported into other VRFs.
Though it is possible to perform such control directly on the
originator, it may be operationally cumbersome in an autonomous
system with a large number of border routers having complex BGP
policies.
Uttaro, et al. Standards Track [Page 2]
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