When a data packet is passed from the receiving interface to its connected FPC, it is received by the incoming Switch Interface ASIC on that specific FPC. During the processing of the packet by this ASIC, the information in the packet’s header is examined by a BA classifier. This classification action associates the packet with a particular forwarding class. In addition, the value of the packet’s loss priority bit is set by this classifier. Both the forwarding class and loss priority information are placed into the notification cell, which is then transmitted to the T-series Internet Processor ASIC.