You did not specify what CAD is using, but as a rule, these drills are created in the schematic scope (eg, a component composed only of a huge Via), and you ground it there, so that these holes will now be treated such as any other components which need to be routed.
You did not specify what CAD is using, but as a rule, these drills are created in the schematic scope (eg, a component composed only of a huge Via), and you ground it there, so that these holes will now be treated such as any other components which need to be routed.
where do this "mounting holes" come from?
Is it a device from a library?
--> then you need to open the SCHEMATIC and connect the symbol pin to the GND Signal
if there is no symbol, then you need to modify the library
If you did just add a VIA, then you need to connect the via with the GND Signal.