%% You should probably cite draft-zhu-lsr-isis-sr-vtn-flexalgo-08 instead of this revision. @techreport{zhu-lsr-isis-sr-vtn-flexalgo-00, number = {draft-zhu-lsr-isis-sr-vtn-flexalgo-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-zhu-lsr-isis-sr-vtn-flexalgo/00/}, author = {Yongqing Zhu and Jie Dong and Zhibo Hu}, title = {{Using Flex-Algo for Segment Routing based VTN}}, pagetotal = 7, year = 2020, month = mar, day = 9, abstract = {As defined in I-D.ietf-teas-enhanced-vpn, enhanced VPN (VPN+) aims to provide enhanced VPN service to support the needs of enhanced isolation and stringent performance requirements. VPN+ requries integration between the overlay VPN and the underlay network. A Virtual Transport Network (VTN) is a virtual network which consists of a subset of network toplogy and network resources allocated from the underlay network. A VTN could be used as the underlay for one or a group of VPN+ services. I-D-dong-lsr-sr-enhanced-vpn defines the IGP mechanisms with necessary extensions to build a set of Segment Routing (SR) based VTNs. This document describes a simplified mechanism to build the SR based VTNs using SR Flex-Algo with minor extensions to IGP L2 bundle.}, }