Abstract: A network communication device includes a plurality of ports, a memory, and a processor. The plurality of ports is configured to receive a packet. A memory is configured to store a first lookup table and a second lookup table. An entry of the first lookup table includes a flag field. An entry of the second lookup table includes an entry address of the first lookup table. The processor is coupled to the memory and the plurality of ports. The network communication device is configured to: analyze the packet by a software or hardware to obtain a source Media Access Control (MAC) address; obtain, according to the source MAC address of the packet, the entry of the first lookup table; read the flag field of the entry; and determine, according to the flag field, whether the entry is referred by the second lookup table.

Abstract: A circuitry applied in a network device is disclosed. The circuitry includes multiple ports, a processor port, a packet buffer, a control circuit and a parser, where the processor port is coupled to a memory and a processor via a bus. In operations of the circuitry, the packet buffer stores a packet received from one of the multiple ports. The parser analyzes the packet to determine a processing manner of the packet, and when the parser determines that the packet is to be processed by software, the control circuit delivers contents of the packet to the memory via the processor port in multiple segments or all at once, for software analysis executed by the processor.

Abstract: A network communication device includes a plurality of ports, a memory, and a processor. The plurality of ports is configured to receive a packet. A memory is configured to store a first lookup table and a second lookup table. An entry of the first lookup table includes a flag field. An entry of the second lookup table includes an entry address of the first lookup table. The processor is coupled to the memory and the plurality of ports. The network communication device is configured to: analyze the packet by a software or hardware to obtain a source Media Access Control (MAC) address; obtain, according to the source MAC address of the packet, the entry of the first lookup table; read the flag field of the entry; and determine, according to the flag field, whether the entry is referred by the second lookup table.