Depending on how
crucial the applications associated with your licenses are, you may want to
create backup License Servers. Although Citrix stores backup copies of your
licenses, downloading many replacement licenses can be time-consuming. You can
either store backup licenses on a network file share or have a configured
backup License Server ready in case of License Server failure.
redundancy solutions might be necessary only in mission-critical environments.
For smaller or less mission-critical deployments, you can back up your License
Server by creating a duplicate License Server that can be stored on or off the
You can ensure
redundancy for your mission-critical environments by:
- Creating a clustered License
Server. For more information about clustering and licensing, see
Setting up the License Server
on a Microsoft Cluster.
- Using the High
Availability (HA) feature on XenServer 5.6 and later.
- Duplicating the License
Server and its contents - Give the duplicate computer the same name as the
active License Server and store it off the network.
- Storing an additional License
Server on the network with a different server name - In this case, when the
active License Server fails, you need to change the backup server name to start
using it as the active License Server.
- Using a network
applicance - If you are using only one License Server to service license
requests at any time, you can use a network appliance that detects server or
network outages and route traffic to a backup License Server.
All methods let you
exchange one server license for another without a loss of service, provided the
exchange occurs within the grace period. There are key points to remember:
- Because license files
reference the server specified during allocation, you can use the files only on
a server with the same binding information (server name or FQDN or MAC address
(possibly displayed on the portal as Ethernet address) as the original License
- You cannot have two License
Servers with the same name on your network active at the same time
- You must add any additional
licenses that you download to both the active License Server and the backup