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Virtualization is a widely used technique that enables limited physical computing resources to be used to support multiple operating systems. Virtual machines can be used to perform operating system backups, test software products, and run applications that cannot function on the host computer. The technology allows businesses to make better use of their physical machines while increasing the variety of platforms at their developer’s disposal.
Using a COM port in a virtual machine can be challenging depending on the virtualization software that is implemented on your physical computers. In some cases, there are native methods with which to establish serial ports on the virtual machines. However, many solutions require that a third-party network communication tool be employed to enable serially-connected peripheral devices to be shared between the host and guest operating systems. We will show you several methods of connecting a virtual guest to a local printer or other devices communicating through a COM interface.
Serial devices connected to the host machine will be recognized by the VMware serial port. VMware serial ports created through the software provide the same level of functionality as the system would achieve with a direct physical connection to the device. Your VMware sessions can access remote serial ports in their virtual machines. Sharing devices across your network is supported and increases the utility of all of your organization’s serially-based equipment.
It is possible to add 4 serial ports to a virtual machine. A virtual serial port can output data to files, named pipes, and physical serial ports. A VMware serial port can be added to a virtual machine in order to create devices such as modems etc. that are made available to the virtual machine itself. The VMware serial ports can also be used to transmit debugging data from the virtual machine to another virtual machine or a host system.
To enable COM port redirection in a virtual machine, begin with:
(For Windows Host) Make use of the default pipe name or enter another pipe name. Make sure the pipe name starts with \\.\pipe\. Ensure that it is the same on both the client and the server.
(For Linux Host) Type a UNIX socket name in the next text box. This could be something like /tmp/socket. As stated above, the name must be identical on the client and server.
To transmit debugging information to a host system application, choose “This End is the Server” on the initial drop-down menu and “The Other End is the Application” on the next drop-down menu.
To transmit debugging information to a virtual machine, choose “This End is the Server” on the initial drop-down menu and “The Other End is the Application” on the next drop-down menu.
Finally, to connect the virtual machine and the port, choose “Connect at Power On”. The connection with the virtual machine will be activated once the machine is on.
When a connection is established between two virtual machines, the first often functions as the server.
Repeat the process for the second virtual machine. However, make sure it is set up as the client by choosing "This End is the Client." Do this when you are configuring the named pipe.