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Cisco ACI Cookbook

Cisco ACI Cookbook

By : Fordham
3.1 (7)
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Cisco ACI Cookbook

Cisco ACI Cookbook

3.1 (7)
By: Fordham

Overview of this book

Cisco Application Centric Infrastructure (ACI) is a tough architecture that automates IT tasks and accelerates data-center application deployments. This book focuses on practical recipes to help you quickly build, manage, and customize hybrid environment for your organization using Cisco ACI. You will begin by understanding the Cisco ACI architecture and its major components. You will then configure Cisco ACI policies and tenants. Next you will connect to hypervisors and other third-party devices. Moving on, you will configure routing to external networks and within ACI tenants and also learn to secure ACI through RBAC. Furthermore, you will understand how to set up quality of service and network programming with REST, XML, Python and so on. Finally you will learn to monitor and troubleshoot ACI in the event of any issues that arise. By the end of the book, you will gain have mastered automating your IT tasks and accelerating the deployment of your applications.
Table of Contents (11 chapters)
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Layer 2 troubleshooting


Layer 2 troubleshooting starts with checking the cables. This may seem obvious but is a step that many hardened engineers can miss, making the assumption that everything is cabled correctly. 

Assuming that everything is connected correctly, we can move on to some basic checks.

How to do it...

  1. We can check that we can see the neighboring devices using some show commands:
      show cdp neighbors
      show lldp neighbors

Link Layer Discovery Protocol (LLDP) is vendor neutral, whereas Cisco Discovery Protocol (CDP) is proprietary to Cisco, so depending on the makeup of the fabric, one will be more applicable at times then the other.

  1. We can check the status of a particular interface from the GUI by navigating to Fabric | Inventory | Pod 1 | Leaf-1 | Interfaces | Physical Interfaces, selecting the interface, and looking at the LLDP Neighbor field.
  1. This does not give us much information, though, and we need to know which interface to select (there may be lots of them in your...

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