%% You should probably cite draft-zhu-lsr-isis-sr-vtn-flexalgo-07 instead of this revision. @techreport{zhu-lsr-isis-sr-vtn-flexalgo-02, number = {draft-zhu-lsr-isis-sr-vtn-flexalgo-02}, 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/02/}, author = {Yongqing Zhu and Jie Dong and Zhibo Hu}, title = {{Using Flex-Algo for Segment Routing based VTN}}, pagetotal = 8, year = , month = , day = , abstract = {Enhanced VPN (VPN+) aims to provide enhanced VPN service to support some application's needs of enhanced isolation and stringent performance requirements. VPN+ requires integration between the overlay VPN connectivity and the characteristics provided the underlay network. A Virtual Transport Network (VTN) is a virtual underlay network which has a customized network topology and a set of network resources allocated from the physical network. A VTN could be used as the underlay for one or a group of VPN+ services. In some network scenarios, each VTN can be associated with a unique Flex-Algo Identifier. This document describes a mechanism to build the SR based VTNs using SR Flex-Algo and IGP L2 bundle with minor extensions.}, }