The new Nortel 1/10Gb Uplink Ethernet Switch Module serves as a switching and routing fabric for all models of BladeCenter server chassis. In addition to the Layer 2 switching capabilities, this switch supports the expanded capabilities of Layer 3 routing. A maximum of four Nortel 1/10Gb Uplink Ethernet Switch modules can reside in the I/O module bays of the BladeCenter E and BladeCenter T chassis. A maximum of six switch modules can reside in the I/O module bays for the BladeCenter H and BladeCenter HT chassis when the optional Multiswitch Interconnect Module is installed. The BladeCenter S chassis supports up to three switch modules for typical applications. The modules can be hot-plugged into the BladeCenter chassis without disrupting normal operations.