Product Documentation

Managing Licenses in XenServer 6.5

Mar 10, 2015

This topic contains information about managing licenses in XenServer 6.5.

All hosts in a pool must be licensed. You can manage your XenServer licenses using the License Manager dialog box in XenCenter. The License Manager allows you to:
  • Assign XenServer licenses to managed servers. When you assign a license, XenServer contacts the Citrix License Server and requests the specified type of license. If a license is available, it is then checked out from the License Server.
  • Release XenServer licenses. When you release a license, XenServer contacts the Citrix License Server and checks the license back in.
Important: Citrix XenServer 6.5 licensing requires Citrix License Server v11.12.1 or higher. You can download the License Server from Citrix Licensing page.

To assign a XenServer license

  1. From the Tools menu, click License Manager.
  2. Select the host(s) or pool(s) that you wish to assign a license and then click Assign License.
  3. In the Apply License dialog box, select the license you want to request from the License Server. For more information about various XenServer licenses, see Licensing Overview (XenServer 6.5).
  4. Enter the License Server details and then click OK.
    Note: By default, the License Server uses port 27000 for communication with Citrix products. If you changed the default port on the License Server, enter the appropriate number in the Port number box. For more information about changing port numbers due to conflicts, see the Licensing Your Product topic on Citrix eDocs.

XenCenter contacts the specified Citrix License Server and requests a license for the specified server(s). If successful, a license is checked out and the information displayed in the XenCenter License Manager will be updated. If the License Server cannot be contacted, then the server lapses into a 30-day licensing grace period.

Note: When requesting or applying licenses, information about the XenServer version and license type may be transmitted to Citrix. No other information relating to any users of the system, virtual machines running in the environment, or the environment in which XenServer is deployed, is collected or transmitted to Citrix. The limited information transmitted to Citrix during the licensing process is handled in accordance with the Citrix privacy policy, a copy of which can be reviewed at

To release a XenServer license

  1. On the Tools menu, click License Manager.
  2. Select the host(s) or pool(s) and then click Release License.