Canon LBP6230dw Manual page 232

Checking the Printer Port
1
Display the printer folder.
2
Right-click the icon of the machine and click [Printer properties] or [Properties].
3
In the [Ports] tab, check that the port is selected correctly.
If you are using a network connection and have changed the machine's IP address
If the [Description] of the selected port is [Canon MFNP Port], and the machine and the computer are on the same subnet, then
the connection will be maintained. You do not need to add a new port. If it is [Standard TCP/IP Port], you need to add a new
port. Configuring Printer Ports
Checking Bidirectional Communication
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Displaying the Printer Folder