Canon LBP6780x Manual page 441

(2) Set WSD printing.
[Use WSD Printing]
[Use WSD
Browsing]
[Use Multicast
Discovery]
(3) Click [OK].
Select the check box to use WSD printing.
When the check box is selected, it obtains printer information using WSD reference.
If you select the [Use WSD Printing] check box, the [Use WSD Browsing]
check box will always be selected.
You can only clear the [Use WSD Browsing] check box when the [Use WSD
Printing] check box is cleared.
Select the check box to use Multicast Discovery.