Users Guide

153 | Software Licenses Dell Networking W-Series ArubaOS 6.4.x| User Guide
Figure 13 Topologies Not Supported by Centralized Licensing
Adding and Deleting Licenses
New licenses can be added to any controller managed by a centralized licensing system, although best practices
recommend adding them to the primary licensing server for easier management and tracking of licenses across
a wide network. Licenses can only be deleted from the controller on which the license is installed.
You do not need to reboot a controller after adding or deleting a license, regardless of whether you enable
centralized licensing. If you delete a license from a licensing client or server and there are no longer enough
licenses to support the number of active APs on the network, the APs remain active until they reboot. If there
are not enough available licenses to bring up an AP after it reboots, that AP will not become active.
Centralized licensing supports evaluation licenses. When a client controller has an evaluation license installed,
those license limits will be sent to the licensing server and added to the license pool as long as the evaluation
period is active. When the evaluation period expires, the client with the expired license sends its revised limits
to the license server. The licensing server removes the evaluation licenses from its license table, then sends
updated license pool information to other clients on the network.
Replacing a Controller
If you need to replace the controller acting as a license server, the keys installed on the previous license server
must be regenerated and added to the new license server. If you need to replace a controller acting as license
client, you must regenerate the license keys installed on the client and reinstall them on the replacement client
or the licensing server.
Failover Behaviors
If the primary licensing server fails, the controller acting as a backup license server will retain the shared license
limits until the backup server reboots. If both the primary and the backup license servers fail, or if the backup
controller reboots before the primary controller comes back up, License clients will retain the license limits sent
to them by the licensing server for 30 days.