Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2 Course Overview

Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2 Course Overview

The "Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2" course is a comprehensive program designed to equip learners with the skills needed to troubleshoot and resolve issues within a Cisco Application Centric Infrastructure (ACI) environment. The course covers systematic troubleshooting approaches, tools, and methodologies that are essential when working with Cisco ACI.

Starting with the Cisco ACI Troubleshooting Methodology, learners are introduced to a structured approach that aids in diagnosing and resolving network problems efficiently. Subsequent modules delve into Troubleshooting Logical and Physical Constructs, identifying issues within the ACI fabric's underlying architecture, and Troubleshooting Cisco APIC, which is the centralized management engine of the ACI framework.

The course further explores Troubleshooting Endpoint Learning, Layer 2, and Layer 3 Routing, ensuring that learners can tackle problems related to network connectivity and traffic flow. Troubleshooting VMM Integration is critical for environments where ACI is integrated with virtual machine managers, while Troubleshooting Layer 4-7 Service Insertion focuses on the challenges associated with services like load balancers and firewalls within the ACI fabric.

Troubleshooting Contracts and Route Leaking addresses the complexities of policy enforcement and cross-tenant communication. The course culminates in a hands-on lab module, allowing learners to apply their knowledge in a practical setting. Overall, this course is vital for network professionals seeking expertise in troubleshooting Cisco Application Centric Infrastructure issues and maintaining optimal network performance.

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Course Prerequisites

To ensure that participants can fully benefit from the Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2 course, the following prerequisites are recommended:


  • Basic understanding of networking protocols, routing, and switching.
  • Familiarity with Cisco Ethernet switching products.
  • Understanding of Cisco data center architecture.
  • Comprehension of the concepts provided by the Cisco Application-Centric Infrastructure (ACI).
  • Experience with network management and operations.

These prerequisites are intended to provide a foundation upon which the course will build. Participants with this minimum knowledge are more likely to grasp the complex troubleshooting methodologies and concepts presented in the DCACIT v5.2 course.


Target Audience for Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2

  1. The DCACIT v5.2 course is designed for professionals managing and troubleshooting Cisco ACI environments, focusing on practical, hands-on skills.


  • Network Engineers
  • Data Center Engineers
  • Technical Support Personnel
  • Cisco Integrators/Partners
  • Systems Engineers
  • Network Designers
  • Network Administrators
  • Network Managers
  • Consulting Systems Engineers
  • Technical Solutions Architects
  • Cisco ACI Users and Administrators
  • IT Professionals looking to expand into Cisco ACI technologies


Learning Objectives - What you will Learn in this Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2?

Brief Introduction:

The Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2 course aims to equip students with skills to troubleshoot key features of Cisco ACI, enhance network agility, and ensure operational continuity.

Learning Objectives and Outcomes:

  • Understand Cisco ACI Troubleshooting Methodology: Grasp a systematic approach to troubleshoot issues within the ACI environment.
  • Troubleshoot Logical and Physical Constructs: Identify and resolve issues related to ACI logical constructs such as tenants, application profiles, and EPGs, as well as physical entities like leaf and spine switches.
  • Diagnose Problems in Cisco APIC: Gain expertise in identifying and rectifying problems within the APIC controller, including cluster issues and fabric connectivity.
  • Resolve Endpoint Learning Issues: Learn to troubleshoot endpoint connectivity issues, ensuring proper communication between devices in the ACI fabric.
  • Troubleshoot Layer 2 Networks: Develop the ability to diagnose and fix Layer 2 networking problems within the ACI architecture, including VLANs and VXLANs.
  • Troubleshoot Layer 3 Routing: Acquire the skills to troubleshoot Layer 3 issues, including inter-tenant routing and external connectivity.
  • Troubleshoot VMM Integration: Understand how to resolve issues related to Virtual Machine Manager (VMM) domain integration with ACI.
  • Troubleshoot Layer 4-7 Service Insertion: Learn to troubleshoot service insertion issues involving application services such as firewalls and load balancers.
  • Troubleshoot Contracts and Route Leaking: Master the troubleshooting of policy enforcement and route leaking between different contexts within ACI.
  • Hands-on Lab Experience: Apply theoretical knowledge in a controlled lab environment to reinforce learning and ensure practical troubleshooting proficiency.

Technical Topic Explanation

Cisco ACI Troubleshooting Methodology

Cisco ACI troubleshooting methodology involves systematically identifying and resolving issues within the Cisco Application Centric Infrastructure (ACI). This infrastructure is designed to optimize application delivery by integrating software and hardware capabilities. Troubleshooting typically begins with verifying network configurations, checking the health scores provided by the ACI dashboard, and utilizing built-in tools such as traceroute, ping, and atomic counters to pinpoint problems. It's crucial to have an understanding of both the physical and virtual components of the network, following a structured approach to trace and correct issues, ensuring smooth operation of the application-centric infrastructure.

Troubleshooting Logical and Physical Constructs

Troubleshooting logical and physical constructs in Cisco Application Centric Infrastructure (ACI) involves diagnosing and resolving issues within the network's architecture. For logical constructs, this means inspecting the software configurations that control data flow, policies, and virtual connections. In physical constructs, it entails examining the actual hardware such as switches and servers to ensure they function correctly. Efficiently managing these components in the ACI application centric infrastructure ensures data moves seamlessly and securely across the network, minimizing disruptions and optimizing performance.

Troubleshooting Cisco APIC

Troubleshooting Cisco APIC involves identifying and resolving issues within the Cisco Application Centric Infrastructure (ACI). This framework helps in optimizing the network through automation and centralized management, aiming for reduced complexity and increased agility. When troubleshooting, focus on understanding the flow of data, checking the configuration settings, and analyzing the system's health and logs. Tools and protocols like traceroute or ping, and Cisco's in-built diagnostic features, help in pinpointing faults in the ACI Application Centric Infrastructure. Effective troubleshooting ensures the network performs optimally, supporting rapid application changes while maintaining security and compliance.

Layer 2

Layer 2 in networking refers to the data link layer of the OSI model, which is responsible for transferring data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment. It uses MAC addresses to ensure that data packets are delivered to the correct devices. Layer 2 devices, such as switches and bridges, operate by using hardware addresses to forward information to the correct destination within a network, enhancing efficiency and handling errors in data transmission.

Troubleshooting Endpoint Learning

Troubleshooting Endpoint Learning in Cisco Application Centric Infrastructure (ACI) involves identifying and resolving issues within the ACI framework where endpoints, such as servers or virtual machines, connect and communicate. Effective troubleshooting ensures that the data flow between these endpoints adheres to predetermined policies, maintaining the security, efficiency, and integrity of the network. Mastery of this skill helps in optimizing the performance and reliability of the Cisco ACI application-centric infrastructure, thereby enhancing the overall operational functionality.

Layer 3 Routing

Layer 3 routing is a process where network devices (routers) decide how to forward data packets based on their IP addresses. Each packet’s destination IP address is examined to determine the best path through a network, from source to destination. This decision-making happens at Layer 3 of the OSI model, which handles protocols like IP. This layer ensures data packets are routed between different network segments correctly and efficiently, adapting to changes like network congestion or link failures to find new routes when necessary. Layer 3 helps maintain scalable, robust networks capable of adapting to varying traffic conditions and network topologies.

Troubleshooting VMM Integration

Troubleshooting VMM Integration in the context of Cisco Application Centric Infrastructure (ACI) involves identifying and resolving issues that prevent the Virtual Machine Manager (VMM) from effectively interacting with the ACI environment. This process is critical for ensuring that the network configurations align correctly with the virtual machines' requirements, optimizing both security and performance. Key steps include verifying connectivity, checking the correct application of policies, and ensuring consistent communication between ACI components and VMM. Effective troubleshooting enhances the efficiency of the Cisco ACI application centric setup, ensuring smooth operations within data centers.

Troubleshooting Layer 4-7 Service Insertion

Troubleshooting Layer 4-7 Service Insertion in Cisco Application Centric Infrastructure (ACI) involves identifying and resolving issues that arise during the integration of networking services (like firewalls and load balancers) within the network fabric. This process ensures that data flows efficiently through the network, adhering to security policies and performance requirements. Effective troubleshooting in Cisco ACI requires understanding both the physical and logical architecture of the network, ensuring applications are performing optimally within the ACI framework, often through diagnostics and targeted configurations adjustments.

Troubleshooting Contracts and Route Leaking

Troubleshooting contracts in Cisco Application Centric Infrastructure (ACI) involves identifying and resolving issues where policies governing network traffic don't work as expected. This requires checking the health and configurations of contracts that dictate how different parts of the network communicate. Route leaking, on the other hand, is a technique within the ACI context used to share routes between different routing domains or between external and internal environments. This makes certain services available across diverse network segments, enhancing connectivity and application performance in an application-centric infrastructure.

Troubleshooting Cisco Application Centric Infrastructure

Troubleshooting Cisco Application Centric Infrastructure (ACI) involves identifying and solving issues within the Cisco ACI network framework, which optimizes data center management and operations. When troubleshooting ACI, technicians assess components like the Application Policy Infrastructure Controller (APIC), network fabric, and connected devices to diagnose disruptions or performance declines. Effective troubleshooting ensures that the application-centric infrastructure maintains high availability, security, and operational continuity. This involves checking configurations, monitoring network traffic, and using diagnostic tools specific to Cisco's ACI environment to pinpoint and resolve problems swiftly.

Target Audience for Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2

  1. The DCACIT v5.2 course is designed for professionals managing and troubleshooting Cisco ACI environments, focusing on practical, hands-on skills.


  • Network Engineers
  • Data Center Engineers
  • Technical Support Personnel
  • Cisco Integrators/Partners
  • Systems Engineers
  • Network Designers
  • Network Administrators
  • Network Managers
  • Consulting Systems Engineers
  • Technical Solutions Architects
  • Cisco ACI Users and Administrators
  • IT Professionals looking to expand into Cisco ACI technologies


Learning Objectives - What you will Learn in this Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2?

Brief Introduction:

The Troubleshooting Cisco Application Centric Infrastructure (DCACIT) v5.2 course aims to equip students with skills to troubleshoot key features of Cisco ACI, enhance network agility, and ensure operational continuity.

Learning Objectives and Outcomes:

  • Understand Cisco ACI Troubleshooting Methodology: Grasp a systematic approach to troubleshoot issues within the ACI environment.
  • Troubleshoot Logical and Physical Constructs: Identify and resolve issues related to ACI logical constructs such as tenants, application profiles, and EPGs, as well as physical entities like leaf and spine switches.
  • Diagnose Problems in Cisco APIC: Gain expertise in identifying and rectifying problems within the APIC controller, including cluster issues and fabric connectivity.
  • Resolve Endpoint Learning Issues: Learn to troubleshoot endpoint connectivity issues, ensuring proper communication between devices in the ACI fabric.
  • Troubleshoot Layer 2 Networks: Develop the ability to diagnose and fix Layer 2 networking problems within the ACI architecture, including VLANs and VXLANs.
  • Troubleshoot Layer 3 Routing: Acquire the skills to troubleshoot Layer 3 issues, including inter-tenant routing and external connectivity.
  • Troubleshoot VMM Integration: Understand how to resolve issues related to Virtual Machine Manager (VMM) domain integration with ACI.
  • Troubleshoot Layer 4-7 Service Insertion: Learn to troubleshoot service insertion issues involving application services such as firewalls and load balancers.
  • Troubleshoot Contracts and Route Leaking: Master the troubleshooting of policy enforcement and route leaking between different contexts within ACI.
  • Hands-on Lab Experience: Apply theoretical knowledge in a controlled lab environment to reinforce learning and ensure practical troubleshooting proficiency.