Selecting the Protocol

The print subsystem uses BSD print protocol and raw TCP to communicate with the printer. The printer vendor documentation provides the information about which protocol to use. In general, we have found that the TCP protocol is more generic across printers.

The command to select the protocol is:

lpadmin -p printer_name -o protocol=bsd

or

lpadmin -p printer_name -o protocol=tcp

If the protocol selected is the BSD print protocol, you can further select the order of sending the control file to the printer. Some printers expect the control file, then the data file; others the reverse. For this information, see the printer vendor documentation. The default is to send the control file first.

The command to select the ordering is:

lpadmin -p printer_name -o bsdctrl=first

or

lpadmin -p printer_name -o bsdctrl=last