Link for ModelSim

Choosing TCP/IP Socket Ports

To use the TCP/IP socket communication, you must choose a TCP/IP socket port number that is available in your computing environment for use by the Link for ModelSim client and server components. The two components use the port number to establish a TCP/IP connection. Port numbers are particularly important for applications that implement multiple clients and servers and use TCP/IP socket communication on a single node. The port numbers uniquely identify each client and server and enable connections only between components sharing the same port number. For remote network configurations, the Internet address helps distinguish multiple connections.

A TCP/IP socket port number (or alias) is a shared resource. To avoid potential collisions, particularly on servers, you should use caution when choosing a port number for your application. Consider the following guidelines:

• If you are setting up a link for MATLAB, consider the Link for ModelSim option that directs the operating system to choose an available port number for you. To use this option, specify 0 for the socket port number.

• Choose a port number that is registered for general use. Registered ports range from 1024 to 49151.

• If you do not have a registered port to use, review the list of assigned registered ports and choose a port in the range 5001 to 49151 that is not in use. Ports 1024 to 5000 are also registered, however operating systems use ports in this range for client programs.

  Consider registering a port you choose to use.

• Choose a port number that does not contain patterns or have a known meaning. That is, avoid port numbers that more likely to be used by others because they are easier to remember.

• Do not use ports 1 to 1023. These ports are reserved for use by the Internet Assigned Numbers Authority (IANA).

• Avoid using ports 49152 through 65535. These are dynamic ports that operating systems use randomly. If you choose one of these ports, you risk a potential port conflict.

Note   The socket port resource is associated with the server component of a Link for ModelSim configuration. That is, if you use MATLAB in a test bench configuration, the socket port is a resource of the system running MATLAB. If you use Simulink in a cosimulation configuration, the socket port is a resource of the system running ModelSim.

Identifying a Server in a Network Configuration

Checking Product Requirements