Abstract: Apparatus and methods are presented for providing processing system network connectivity, and more particularly, for routing data packets between at least two processing system networks. A first memory for storing at least one address for each of the networks, and a second memory for storing selectively at least one address for particular ones of the networks, are provided. A control circuit for routing a received data packet from a source network to a destination network is also provided. The control circuit utilizes a destination address which was retrieved from one of the first memory and the second memory, in response to a determination as to whether at least one address corresponding to the destination network is stored in the second memory.