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Extensions to RT-Constrain in Hierarchical Route Reflection Scenarios

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Expired & archived
Authors Jie Dong , Mach Chen , Robert Raszuk
Last updated 2018-01-04 (Latest revision 2017-07-03)
Replaces draft-dong-idr-rtc-hierarchical-rr
RFC stream Internet Engineering Task Force (IETF)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Route Target (RT) Constrain mechanism specified in RFC 4684 is used to build a route distribution graph in order to restrict the propagation of Virtual Private Network (VPN) routes. In network scenarios where hierarchical route reflection (RR) is used, the existing RT-Constrain mechanism cannot guarantee a correct route distribution graph. This document describes the problem scenario and proposes a solution to address the RT-Constrain issue in hierarchical RR scenarios.


Jie Dong
Mach Chen
Robert Raszuk

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)