This document is a deployment guide that provides detailed instructions for using Palo Alto Networks Next-Generation Firewall (NGFW) clustering to achieve a resilient and scalable network security design in data center environments. It outlines the necessary procedures for deploying a Palo Alto Networks NGFW cluster, including various design models such as Layer 3 equal-cost multi-path, Layer 3 link aggregation, and virtual-wire link aggregation. The guide is intended for system architects, design engineers, and technical staff who have a foundational understanding of applications, virtualization, network security, and data center architecture. It also includes prerequisites, assumptions, and deployment details necessary for successful implementation. The guide emphasizes the importance of choosing the right design model based on network integration goals, resilience, scalability, and operational requirements. Additionally, it discusses management and logging, firewall setup, and security policy provisioning, ensuring that users can effectively configure and manage their network security solutions.