The Lattus Rack Switch is the back end network connection between the Lattus C10s and the Lattus S10s. The Rack Switch is a 1U, redundant power, rack-mount switch. The switch comes in two configurations. A single rack configuration contains 43 1-GbE ports for Storage Node connectivity; and two dual-port 10-GbE SFP+ modules for Controller Node connectivity. Two to three rack configurations require that the switches be "stacked" together utilizing a 12 GbE stacking module and special copper stacking cables. In a rack configuration greater than three there are two rack switches in each rack. The stacking cables have a maximum length of four meters, so plan the locations of your racks accordingly. If your racks are further apart, non-stacking modules can be used.