Internet Engineering Task Force (IETF) A. Clemm Request for Comments: 8345 Huawei Category: Standards Track J. Medved ISSN: 2070-1721 Cisco R. Varga Pantheon Technologies SRO N. Bahadur Bracket Computing H. Ananthakrishnan Packet Design X. Liu Jabil March 2018 A YANG Data Model for Network Topologies Abstract This document defines an abstract (generic, or base) YANG data model for network/service