Patent ID: 7130271
Filing Date: 2006-10-31
Classification: H04L

Abstract:
1. An apparatus comprising: a switching portion; a plurality of ports connected to the switching portion; an up-link monitoring portion which detects a congested state of an up-link, which is a link in an approaching direction toward a backbone network, connected to the ports through the switching portion, and a flow controller which imposes a transmission restriction on a port using the up-link among the ports for releasing the congested state of the up-link when the up-link monitoring portion detects the congested state of the up-link, wherein the apparatus is connected to a second apparatus with a stack-link, which is a link in a receding direction from the backbone network, further comprising a stack-link monitoring portion which detects a congested state of the stack-link connected to the ports through the switching portion, the flow controller imposing a transmission restriction on a port using the stack-link among the ports for releasing the congested state of the stack-link when the stack-link monitoring portion detects the congested state of the stack-link.