Huawei Huawei Technologies, Co., Ltd Huawei This document defines a YANG modules that augment the System data model defined in the RFC 7317 with TACACS+ client model. The data model of Terminal Access Controller Access Control System Plus (TACACS+) client allows the configuration of TACACS+ servers for centralized Authentication, Authorization and Accounting. The YANG modules in this document conforms to the Network Management Datastore Architecture (NMDA) defined in RFC 8342.