PPPOe Dial On Demand

Hello there,
I was thinking to use the "Dial On Demand " to less stress the card because they would get less active connections. Anyone have experience with this?
I have about 450 clients in my ISP, in about 20 routers.

Thanks.

where is the pppoe server, in the access point or you have a central subscriber ?

I have a central subscriber.

In pppoe CPE client you must enable “dial on demand”.
You can set “idle timeout” time in cpe pppoe profile or suscriber server profile