CAM Update Datagram ATM Header Ver HL ToS Packet Len Fragment IP ID Updated UDP Control Packet programs up-to-N CAM entries Fields allocated for: Transmit enable Base CAM Number of CAMs FlowID per CAM Checksum Proto TTL Source IP address 192.168.30.13 ( 0xC0A81E0D ) Src Port Dest Port ( 0x0320 ) Length Checksum X ... Base_CAM #CAMs CAM_1_SRC_IP transmit_enable CAM_1_DEST_IP CAM_VALUE_1 CAM_1_PORTS CAM_1_ PROTO (PAD) Match_ vector Flow_ID CAM_MASK_1 CAM_MASK_1 CAM_2_SRC_IP CAM_2_DEST_IP CAM_VALUE_2 CAM_2_PORTS CAM_2_ PROTO (PAD) Match_ vector Flow_ID CAM_MASK_2 CAM_MASK_2 … (if necessary) AAL5 Pad CPS-UU & CPI Frame Len AAL5 Frame Checksum