VMware vSphere 4 Installation Guide download pdf (Page 13)

Licensing

Licensing is centralized in vCenter Server.

If you upgrade all your hosts, you no longer need a license server or host-based license files. All product licenses

are encapsulated in 25-character license keys that you can manage and monitor from vCenter Server.

Each host requires a license, and each vCenter Server instance requires a license. You cannot assign multiple

license keys to a host or to a vCenter Server system. You can license multiple hosts with one license key if the

key has enough capacity for more than one host. Likewise, you can license multiple vCenter Server instances

with one license key if the key has a capacity greater than one. When you apply a minor upgrade or patch the

ESX/ESXi or vCenter Server software, you do not need to replace the existing license key with a new one. If

you upgrade the edition of the license (for example, from standard to enterprise), you must replace the existing

license key in the inventory with a new upgraded license key.

On the VMware Web site, log in to your account page to access the license portal. From the license portal,

upgrade your legacy licenses. After you upgrade to vCenter Server and ESX 4.0/ESXi 4.0, use the vSphere Client

to assign the upgraded license keys to your assets.

Chapter 1 Changes to the Upgrade Process

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VMware vSphere 4 Installation Guide Page 13