Book Image

Troubleshooting NetScaler

By : Raghu Varma Tirumalaraju
Book Image

Troubleshooting NetScaler

By: Raghu Varma Tirumalaraju

Overview of this book

NetScaler is a high performance Application Delivery Controller (ADC). Making the most of it requires knowledge that straddles the application and networking worlds. As an ADC owner you will also likely be the first person to be solicited when your business applications fail. You will need to be quick in identifying if the problem is with the application, the server, the network, or NetScaler itself. This book provides you with the vital troubleshooting knowledge needed to act fast when issues happen. It gives you a thorough understanding of the NetScaler layout, how it integrates with the network, and what issues to expect when working with the traffic management, authentication, NetScaler Gateway and application firewall features. We will also look at what information to seek out in the logs, how to use tracing, and explore utilities that exist on NetScaler to help you find the root cause of your issues.
Table of Contents (17 chapters)
Troubleshooting NetScaler
Credits
Notice
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Licensing issues


You can check the status of licensing on your NetScaler by running the show license command. This should show which features are licensed:

Note

The NetScaler editions page available at https://goo.gl/sE8Pth is an excellent resource for understanding what features each of the license types includes.

These feature licenses are tied to a value called the hostID, an ID which is based on the MAC address of one of the interfaces that you provide when allocating your licenses on the Citrix portal:

If there is a mismatch between what is provided during allocation versus the ID of the device, the license will fail to apply. Consequently, this ID is an important focus area when troubleshooting licensing.

To troubleshoot licensing issues, use the following method:

  1. Go to shell.

  2. Change the directory to /var/log.

  3. Run a cat license.log | grep hostid and look for any errors.

The following Wrong hostid error is an indication that this needs to be resolved by reallocating the license with the correct...