Classification for media stream packets in a media gateway

A method in Field Programmable Gate Array for processing packets received at a media gateway is provided. The method includes ascertaining whether a received packet is a UDP (User Datagram Protocol) packet. The method also includes comparing first portion of UDP destination port number from UDP packet header with first portion with UDP port base that has been set up in media gateway. If a match exist, employing second portion of UDP destination port number as a key to UDP port table to ascertain whether packets associated with media stream ID are to be discarded, and discarding received packet if packet associated with media stream ID is to be discarded. If not, obtaining media processing CPU ID associated with media stream ID, formulating destination MAC address, and updating packet with destination MAC address, thereby enabling packet to be switched to media processing CPU associated with media processing CPU ID.