MATLAB: Is the hardware address required for a flexlm client license.

client license file

When creating a client flexlm license we have traditionally used:

SERVER "<fully qualified domain name>" "<hardware address>" port

USE_SERVER

We have tested this without the hardware address and it seems to still work perfectly. Is there any issue not using the hardware address in the client license server file as shown above?

Best Answer

According to the Flexnet publisher documentation, the format of the SERVER line is:

SERVER host hostid [port] [PRIMARY_IS_MASTER] [HEARTBEAT_INTERVAL=seconds]

Your 'host' is the IP address or hostname.

The hostid is "the string returned by the lmhostid command. This is changed only by your publisher."

So the answer depends on the output of the lmhostid command. Please run

lmutil lmhostid

from the license manager folder location to check it out.

Ori Kaplan

OpenLM - Engineering Software License Management

Check out our MATLAB license management capabilities

Related Solutions

MATLAB: What are the differences between the license.lic, license.dat, network.lic, and license_info.xml license files

There are four different types of license file:

license.lic

For Individual or Designated Computer licenses, this is a standard license file generated from the MathWorks License Center. If this license is automatically generated during installation, it will also contain the hostname, license number and release in the filename.
For Concurrent or Network Named User licenses, this is an unprocessed license file used to install the network license manager. It is also generated on the MathWorks License Center. On network licenses, the license.lic file is *only *used for the installation of the network license manager.

license_info.xml

The license_info.xml file is used for Individual licenses with Login Named User enabled.
This type of license file is common for trial licenses and licenses being used on cloud compute services.
The license_info.xml file contains no license data; rather it instructs MATLAB to connect to MathWorks on launch to authenticate the license.
If a license_info.xml file is in place, you will be prompted to enter your MathWorks Account credentials upon launching MATLAB.

license.dat

The license.dat is a processed license file that is created during the installation of the network license manager on the license server. When the network license manager is installed using the MATLAB installer, the license.dat is placed in the $MATLAB/etc folder (where $MATLAB is the installation directory).
The license.dat contains two additional lines at the top of the file, the SERVER line and the DAEMON line. These lines are generated by the installer and contain information specific to the machine the installer was run on.
The license.dat is used during the installation of MATLAB on network clients.
You can manually convert a license.lic to a license.dat by adding the SERVER and DAEMON lines and changing the file extension from .lic to .dat.
The syntax for the SERVER and DAEMON lines is as follows:

SERVER {hostname} {HostID} 27000
DAEMON MLM {$MATLAB}/etc/MLM

network.lic

The network.lic is created when a license.dat is provided during installation of a network client installation. Similarly, when a network client installation is activated using the MATLAB activation client, the network.lic is placed in the $MATLAB/licenses folder (where $MATLAB is the installation directory).
The network.lic contains two lines, a SERVER line and the USE_SERVER directive.
You can manually convert a license.dat to a network.lic by deleting everything but the first line and replacing it with the USE_SERVER directive.
The network.lic can be used instead of the license.dat for activation of a network client installation.
The network.lic is only used on network client computers.
The syntax for the file is as follows:

SERVER {hostname} {HostID} 27000
USE_SERVER

Please note that with the exception of the license_info.xml license file, these names are conventions, not rules. The exact names and functions of these files may vary depending on your local MATLAB configuration. Any questions related to your specific usage should be directed to your license administrator.

MATLAB: Using two license servers

This answer may help you.

You can specify first and second license servers using MLM_LICENSE_FILE environment variable.

Add a new environent variable MLM_LICENSE_FILE in Windows, Linux or Mac and set the value as

Windows

port1@licenseserver1hostname;port2@licenseserver2hostname

Linux/Mac

port1@licenseserver1hostname:port2@licenseserver2hostname

Or, you can also specify the license files.

For example, first, rename license files as network1.lic (for accessing license server1) and network2.lic (for license server2).

And set environment variable MLM_LICENSE_FILE as follows.