Canon LBP7660Cdn Manual page 461

(2) Set Multicast Discovery.
[Respond to
Discovery]
[Scope Name]
(3) Click [OK].
Select the check box to allow it to respond to a multicast search request.
Enter the scope name used when a specified device is searched from utility software
such as NetSpot Device Installer using multicast. Up to 32 characters can be
entered.
You cannot use any of the following characters: "(", ")", ",", "!", "<", ">", "=",
"~", ";", "+", "*", "\."