Patent Number: 6,298,067

Title: Distributed arbitration scheme for network device

Abstract: A distributed arbitration scheme for a network. Ports in a network device determine which port in a set of ports may broadcast a packet onto a bus in the network device. A method of transmitting data between a set of ports sharing a bus in hub is described. The set of ports includes a first port, and the method comprises the first port receiving a packet, the first port requesting the bus, and, if another port is requesting the bus, the first port transmitting the packet to the bus if the first port has not transmitted a packet later than the another port requesting the bus. A system using two clocks of different speeds in a network device device. The hub has at least a port. The port has an internal data path having a first width. A bus is coupled to the port. The bus has a data path that has a second width. The second width is greater than the first width. The hub includes a first clock that has a first frequency and is coupled to circuitry in the port for clocking internal data transfers. The hub includes a second clock that has a second frequency less than the first frequency, and the second clock is coupled to circuitry in the port for clocking data transfers with the bus.

Inventors: Tang; Wen-Tsung (Saratoga, CA)

Assignee: 3 Com Corporation

International Classification: H04J 3/06 (20060101); H04L 12/413 (20060101); H04L 12/407 (20060101); H04J 003/02 ()

Expiration Date: 10/02/2018