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BGP-LS with Multi-topology for Segment Routing based Virtual Transport Networks

Document Type Replaced Internet-Draft (idr WG)
Expired & archived
Authors Chongfeng Xie , Cong Li , Jie Dong , Zhenbin Li
Last updated 2022-02-04 (Latest revision 2022-01-09)
Replaced by draft-ietf-idr-bgpls-sr-vtn-mt
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd Susan Hares
Shepherd write-up Show Last changed 2022-02-04
IESG IESG state Replaced by draft-ietf-idr-bgpls-sr-vtn-mt
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Enhanced VPN (VPN+) aims to provide enhanced VPN service to support some applications' needs of enhanced isolation and stringent performance requirements. VPN+ requires integration between the overlay VPN and the underlay network. A Virtual Transport Network (VTN) is a virtual underlay network which consists of a subset of the network topology and network resources allocated from the physical network. A VTN could be used as the underlay for one or a group of VPN+ services. When Segment Routing is used as the data plane of VTNs, each VTN can be allocated with a group of Segment Identifiers (SIDs) to identify the topology and resource attributes of network segments in the VTN. The association between the network topology, the network resource attributes and the SR SIDs may need to be distributed to a centralized network controller. For network scenarios where each VTN can be associated with a unique logical network topology, this document describes a mechanism to distribute the information of SR based VTNs using BGP-LS with Multi-Topology.


Chongfeng Xie
Cong Li
Jie Dong
Zhenbin Li

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