Patent Number: 6,310,875

Title: Method and apparatus for port memory multicast common memory switches

Abstract: Methods, systems, and networks for tracking multicast cell copies in a switch. The switch includes a plurality of output ports each having an associated output port register, and a port memory controller for receiving a bit map on the enqueue of a cell into the switch. The bit map includes a bit for each output port register. The port memory controller writes to each output port register the bit from the bit map for that port register. The value of a bit in an output port register indicates whether a copy of the enqueued cell is to be transmitted from the output port associated with that output port register.

Inventors: Nichols; Stacy W. (Kanata, CA), Brown; David A. (Carp, CA), Stuart; David G. (Almonte, CA)

Assignee: Nortel Networks Limited

International Classification: H04L 12/56 (20060101); H04L 012/54 (); G06F 012/00 ()

Expiration Date: 10/30/2018