Patent 7684340 was granted and assigned to Realtek on March, 2010 by the United States Patent and Trademark Office.
A packet forwarding device is disclosed. The packet forwarding device includes: a transmission interface, coupled to a second network device; a processing unit, coupled to a first network device; a forwarding unit, coupled between the transmission interface and the processing unit; and an interface loop-back, coupled between the forwarding unit and the processing unit.