Cisco ACI Architecture, Policy & Fabric Networking

Master Cisco ACI architecture, policy models, VXLAN forwarding, external connectivity, and scalable fabric designs
What you'll learn

---

Understand the evolution from traditional tiered data center networking to spine leaf architecture.
Learn the core architecture and physical topology of Cisco ACI.
Understand the role, operation, and high availability of the APIC.
Learn how ACI fabric initialization and automated discovery mechanisms work.
Understand the ACI logical model, including tenants and tenant classification.
Learn how VRFs and Bridge Domains provide Layer 2 and Layer 3 segmentation.
Understand Application Profiles and Endpoint Groups (EPGs).
Learn how contracts, subjects, and filters regulate traffic between EPGs.
Understand VXLAN encapsulation and overlay forwarding mechanics.
Learn how endpoint learning and station table operations work within the fabric.
Understand unicast and multicast packet flows across the ACI fabric.
Learn ARP handling, subnet placement, and unicast routing within Bridge Domains.
Understand the architecture of external Layer 2 connectivity through L2Out.
Learn the architecture and core components of external Layer 3 connectivity through L3Out.
Understand Border Leaf functionality and the use of BGP and OSPF for external routing.
Learn how transit routing and route redistribution work in Cisco ACI.
Understand Multi-Pod architecture, including the Inter-Pod Network (IPN) and centralized APIC control.
Learn Multi-Site architecture, including the Inter-Site Network (ISN) and orchestration.
Understand Remote Leaf and virtual ACI deployment models.
Learn microsegmentation and intra-EPG isolation frameworks.
Understand Layer 4-7 service insertion using Service Graphs and device packages.
Learn Role-Based Access Control (RBAC) and Security Domains in ACI.
Understand the Quality of Service (QoS) architecture used in Cisco ACI.
Learn about health scores, fault lifecycles, and fabric telemetry frameworks.
Requirements

---

Basic understanding of computer networking, IP addressing, and data center networking concepts is recommended.
Description

---

Cisco ACI is a powerful approach to modern data center networking, combining a spine leaf fabric with policy based management, automation, segmentation, and centralized control. This course provides a comprehensive conceptual understanding of Cisco ACI architecture, policy models, fabric forwarding, external connectivity, scaled deployment models, and key governance and visibility capabilities.
You will begin by understanding how data center networking has evolved from traditional tiered designs to spine leaf architecture, followed by the core architecture and physical topology of Cisco ACI. The course explains the role of the Application Policy Infrastructure Controller (APIC), its high availability design, and how fabric initialization and automated discovery mechanisms establish the ACI fabric.
You will explore the ACI logical model and learn how Tenants, VRFs,Bridge Domains, Application Profiles, and Endpoint Groups (EPGs) work together to organize and segment network environments. The course also explains Contracts, Subjects, and Filters, helping you understand how ACI regulates communication between different EPGs.
The course then examines how traffic moves through the ACI fabric. You will learn about VXLAN encapsulation, overlay forwarding, endpoint learning, station tables, unicast and multicast packet flows, ARP handling, subnet placement,and unicast routing within Bridge Domains. These concepts provide a strong foundation for understanding how ACI handles endpoints and forwards traffic across the fabric.
External connectivity is another important area covered in the course. You will learn the architecture of L2Out and L3Out, the role of Border Leaf switches, and how external routing protocols such as BGP and OSPF are used with Cisco ACI. The course also covers transit routing and route redistribution, giving you a broader understanding of how ACI interacts with external networks.
You will also explore scaled ACI deployment models, including Multi-Pod, Multi-Site, Remote Leaf, and virtual ACI. The course explains the role of the Inter Pod Network (IPN), Inter Site Network (ISN), centralized APIC control, and orchestration. You will also learn about microsegmentation and intra-EPG isolation frameworks for controlling communication within ACI environments.
The final part of the course focuses on service integration, governance, and visibility. You will learn about Layer 4-7 service insertion, Service Graphs, device packages, Role-Based Access Control (RBAC), Security Domains, QoS architecture, health scores, fault lifecycles, and fabric telemetry frameworks.
By the end of the course, you will have a structured understanding of how Cisco ACI is designed, how its logical and physical components interact, how policies control communication, how traffic is forwarded, how external networks connect to the fabric, and how ACI can be extended and managed across larger environments.
Thank you for choosing this course and taking the time to build your knowledge of Cisco ACI.
Who this course is for

---

Network engineers looking to understand Cisco ACI architecture and fabric design.
Data center engineers working with modern spine leaf networking environments.
Network administrators interested in Cisco ACI policy models and logical constructs.
IT professionals seeking knowledge of ACI forwarding, VXLAN, and endpoint mechanics.
Networking students and professionals who want to build a strong conceptual foundation in Cisco ACI.
Homepage

---