The upgrade procedure requires a temporary number of IP addresses in addition to your existing IP address configuration. vSphere provides a tool that enables you to add this required IP range.
About this task
You can use this procedure to add IP addresses for any reason. If you are not adding IP addresses as part of the upgrade procedure, the specific number of IP addresses required might not apply.
Procedure
What to do next
If you added IP addresses as part of the upgrade process, you can now obtain and install the upgrade patch.