Book Image

Cisco ACI Cookbook

By : Stuart Fordham
Book Image

Cisco ACI Cookbook

By: Stuart 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 (17 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

FEX troubleshooting


If you have extended your fabric with a Fabric Extender (FEX), you can check the connectivity and status from the leaf node.

How to do it...

  1. Once you have connected to the leaf that the FEX attaches to, you can run these commands:
      sh fex
      sh fex detail

The first command will show the state, model, and serial number. The second command will show the same information, along with the port states.

  1. If we wanted to dig deeper, we could check the link between the FEX and the leaf, using the show fex transceiver command,  which will show us the hardware properties of the transceiver. We can also look at the environmental data (such as temperature and CPU usage) using the show environment fex command. While we would hope that the same information would be readable through SNMP and already available to us in our monitoring platform, we may be in a situation where that information is not flowing (such as the CPU being overworked).

There's more...

Other useful commands are show...