This document discusses the implementation of an automation tool for configuring Cisco Application Centric Infrastructure (ACI) networks using Software Defined Networking (SDN) principles, leveraging Ansible and Python. By automating configurations, the proposed tool significantly reduces the manual configuration time from 50 minutes to just 6 minutes, achieving an 833.33% improvement in productivity. The case study conducted at PT NTT Indonesia Technology demonstrates the tool's effectiveness in accurately and automatically performing multiple router configurations.