PPP-over-ATM (PPPoA) configurations support statically created PPP logical subscriber interfaces over static ATM underlying interfaces. (Dynamic creation of the PPP interfaces is not supported.) Most features supported for PPPoE configurations are also supported for PPP access to an MX Series router over an ATM network. You can dynamically apply subscriber services such as CoS and firewall filters to the static PPP logical subscriber interface by configuring the services in the dynamic profile that creates the PPP logical interface.