US Patent 7516263 Re-configurable PCI-Express switching device

A configurable switching device includes a switch card coupled to interface with a backplane of a computer chassis, a plurality of PCI-Express switching elements coupled to the switch card, and a configuration means coupled to the switch card, where the configuration means is operable to configure and reconfigure the plurality of PCI-Express switching elements to operate in a plurality of directional fabric domains, and where each of the plurality of PCI-Express switching elements can operate in only one of the plurality of directional fabric domains at a time.