IGP Extensions for Segment Routing based Enhanced VPN

Document Type Expired Internet-Draft (individual)
Authors Jie Dong  , Zhibo Hu , Zhenbin Li  , Xiongyan Tang , Ran Pang  , Lee JooHeon  , Stewart Bryant 
Last updated 2020-12-25 (latest revision 2020-06-23)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Enhanced VPN (VPN+) is an enhancement to VPN services to support the needs of new applications, particularly including the applications that are associated with 5G services. These applications require enhanced isolation and have more stringent performance requirements than that can be provided with traditional overlay VPNs. An enhanced VPN may be used for 5G transport network slicing, and will also be of use in more generic scenarios. To meet the requirement of enhanced VPN services, a number of Virtual Transport Networks (VTN) need to be created, each with a subset of the underlay network topology and a set of network resources allocated to meet the requirement of a specific VPN+ service, or a group of VPN+ services. This document specifies the IGP mechanisms with necessary extensions to build a set of Segment Routing (SR) based VTNs. The VTNs could be used as the underlay of enhanced VPN service. The proposed mechanism is applicable to both Segment Routing with MPLS data plane (SR-MPLS) and segment routing with IPv6 data plane (SRv6).


Jie Dong (jie.dong@huawei.com)
Zhibo Hu (huzhibo@huawei.com)
Zhenbin Li (lizhenbin@huawei.com)
Xiongyan Tang (tangxy@chinaunicom.cn)
Ran Pang (pangran@chinaunicom.cn)
Lee JooHeon (playgame@lguplus.co.kr)
Stewart Bryant (stewart.bryant@gmail.com)

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