BGP Extensions for Enhanced VPN Auto Discovery

Document Type Expired Internet-Draft (individual)
Authors Shunwan Zhuang  , Zhenbin Li  , Donald Eastlake  , Lucy Yong 
Last updated 2022-01-10 (latest revision 2021-07-09)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


A variety of VPN technologies have been widely deployed to bear different services. As new applications develop, a requirement has been proposed for auto-discovery of Layer 3 Virtual Private Networks (L3VPN) and enhanced auto-discovery requirements for other VPN technologies that already have basic auto-discovery mechanisms. This document identifies some possible applications of these auto- discovery requirements and defines a new BGP NLRI, called the BGP- VPN-INSTANCE NLRI, to satisfy the requirement for auto-discovery of BGP VPN instances. It also defines a new type of extended community, called the Import Route Target, which can be applied to auto- discovery mechanisms of multiple VPN technologies.


Shunwan Zhuang (
Zhenbin Li (
Donald Eastlake (
Lucy Yong (

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