Abstract: A symmetric dual-slot data hash method and a switching apparatus using the same having a first block and a second block of equal size for storing MAC addresses. The size of the dual-slot address table is p×2m with m is an integer, and p is 2 or a prime. The hash address comprises a higher address portion and a lower address portion. A CRC hash operation is performed to the MAC address by using the m-bit CRC function to obtain a hash value. Next, the highest bit of the hash value is removed and the remained bits are used as the lower address portion of the hash address. A dividend is set according to the m-th bit of the MAC address. After the dividend is divided by a divisor p to obtain a remainder, the remainder is set as a higher address portion of the hash address.

Abstract: A method for buffer management and a controller of the same are disclosed. In the buffer management method, a first control mode is performed, and a plurality of bits are used to control a bit mask region of a memory. A second control mode is performed, and a plurality of unused addresses in a link region of the memory is cached. A third control mode is performed, to control a plurality of second unused addresses in the link region by a linked list. The controller comprises a plurality of bits for controlling a bit mask region; a plurality of address cache units for caching a plurality of first unused address of a linked list in a link region; and a pointer for always pointing to a head of the linked list in the link region, wherein the linked list links a plurality of second unused addresses.

Abstract: An Ethernet switch controller with console command logic unit and application apparatus thereof implemented with the least cost. The switch controller includes a serial port interface that connects with an external ASCII console. A user can input a serial character command through this console. The switch controller interprets and executes the command it received. When the command is a read command, the controller sends the result to be displayed on the console. Therefore, advance function commands can be implemented for the Ethernet switch to read data from or write data to a register within the Ethernet switch controller, a physical layer or an EEPROM.

Abstract: A method for buffer management and a controller of the same are disclosed. In the buffer management method, a first control mode is performed, and a plurality of bits are used to control a bit mask region of a memory. A second control mode is performed, and a plurality of unused addresses in a link region of the memory is cached. A third control mode is performed, to control a plurality of second unused addresses in the link region by a linked list. The controller comprises a plurality of bits for controlling a bit mask region; a plurality of address cache units for caching a plurality of first unused address of a linked list in a link region; and a pointer for always pointing to a head of the linked list in the link region, wherein the linked list links a plurality of second unused addresses.

Abstract: A symmetric dual-slot data hash method and a switching apparatus using the same having a first block and a second block of equal size for storing MAC addresses. The size of the dual-slot address table is p×2m with m is an integer, and p is 2 or a prime. The hash address comprises a higher address portion and a lower address portion. A CRC hash operation is performed to the MAC address by using the m-bit CRC function to obtain a hash value. Next, the highest bit of the hash value is removed and the remained bits are used as the lower address portion of the hash address. A dividend is set according to the m-th bit of the MAC address. After the dividend is divided by a divisor p to obtain a remainder, the remainder is set as a higher address portion of the hash address.