Book Image

VMware vSphere Troubleshooting

Book Image

VMware vSphere Troubleshooting

Overview of this book

VMware vSphere is the leading server virtualization platform with consistent management for virtual data centers. It enhances troubleshooting skills to diagnose and resolve day to day problems in your VMware vSphere infrastructure environment. This book will provide you practical hands-on knowledge of using different performance monitoring and troubleshooting tools to manage and troubleshoot the vSphere infrastructure. It begins by introducing systematic approach for troubleshooting different problems and show casing the troubleshooting techniques. You will be able to use the troubleshooting tools to monitor performance, and troubleshoot issues related to Hosts and Virtual Machines. Moving on, you will troubleshoot High Availability, storage I/O control problems, virtual LANS, and iSCSI, NFS, VMFS issues. By the end of this book, you will be able to analyze and solve advanced issues related to vShpere environment such as vcenter certificates, database problems, and different failed state errors.
Table of Contents (16 chapters)
VMware vSphere Troubleshooting
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Installing VMware vRealize Operations Manager
Power CLI - A Basic Reference
Index

Troubleshooting iSCSI-related issues


The vSphere hosts also use IP-based storage as a remote storage. VCLI provides powerful command-line tools to monitor, manage, and troubleshoot IP storage. Two namespaces are provided by VMware—esxcli iscsi and vicfg-iscsi—to perform the different configuration of iSCSI storage and vSphere hosts.

The vSphere hosts use two different processes to discover iSCSI targets: dynamic discovery and static discovery. In the dynamic discovery process, all targets are discovered by the iSCSI target name and the IP address or a hostname. In the static discovery process, you need to configure a hostname or IP address and an iSCSI target name manually. iSCSI target names are similar to UUID to identify iSCSI targets. It could be an IQN or EUI name as can be seen in the following screenshot:

You can see the IQN name has the year 1998 and month 01 as part of the name which is the domain registration date. The next part com.vmware:crimv3esx001 is a reversed domain name,...