To start the license server system, invoke the License manager daemon, lmgrd, on the server machine.
To point to a floating license key, use either the XILINXD_LICENSE_FILE variable (preferred) or the LM_LICENSE_FILE variable to point to the port@server location.
On Windows Operating Systems, you can use the Xilinx License Configuration Manager (XLCM) to set the XILINXD_LICENSE_FILE variable.
On Linux Operating Systems, you cannot set up the licensing environment with the Xilinx License Configuration Manager (XLCM). The environment variable fields are read only, therefore, they are grayed out and there are no "Set" buttons. For this reason, you must set up the licensing environment using an environment variable and the appropriate shell and commands instead.
For Windows, use a semicolon ";" to separate the different servers or license files.
Example: XILINXD_LICENSE_FILE = 2100@IP;C:\Xilinx\license.lic
For Linux, use a colon ":" to separate the different servers or license files.
Example: XILINXD_LICENSE_FILE = 2100@IP:/home/name/license.lic
For more information on how to set environment variables, please see (Xilinx Answer 11630).