Method and system for routing a network packet received at a port within a network is provided. The method includes (a) generating an index value based on a destination identifier for the network packet; (b) generating one or more physical port numbers based on the index value generated in step (a); wherein each port number identifies a port for sending and receiving network packets; and (c) selecting one of the physical port numbers to route the network packet; wherein the port number is selected based on reaction selector signal that is generated from a partition key table based on a partition key value embedded in the network packet.