Why? By doing this, you create a bypass around Pi-Hole, which defeats the purpose of having a Pi-Hole. There is no real concept of "secondary" DNS on a router, it's just another DNS and clients will use them both if they can.
Why? By doing this, you create a bypass around Pi-Hole, which defeats the purpose of having a Pi-Hole. There is no real concept of "secondary" DNS on a router, it's just another DNS and clients will use them both if they can.