Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN

Document Type Replaced Internet-Draft (individual)
Authors Jie Dong  , Stewart Bryant  , Takuya Miyasaka  , Yongqing Zhu  , Fengwei Qin  , Zhenqiang Li  , Francois Clad 
Last updated 2021-01-18
Replaced by draft-ietf-spring-sr-for-enhanced-vpn
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Segment Routing (SR) leverages the source routing paradigm. A node steers a packet through an ordered list of instructions, called "segments". A segment can represent topological or service based instructions. A segment can further be associated with a set of network resources used for executing the instruction. Such a segment is called resource-aware segment. Resource-aware Segment Identifiers (SIDs) may be used to build SR paths with a set of reserved network resources. In addition, a group of resource-aware SIDs may be used to build SR based virtual underlay networks, which has customized network topology and resource attributes required by one or a group of customers and/or services. Such virtual networks are the SR instantiations of Virtual Transport Networks (VTNs). This document describes a suggested use of resource-aware SIDs to build SR based VTNs.


Jie Dong (
Stewart Bryant (
Takuya Miyasaka (
Yongqing Zhu (
Fengwei Qin (
Zhenqiang Li (
Francois Clad (

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