A cable management rack is provided within which or upon which a heat-generating device is mountable, and which encompasses a vertical rectangular frame open in a front and a rear of the frame. The rack includes a first upright and a second upright attached to opposite respective lateral sides of a base and a top member, and respective side-facing panels. Each of the panels defines a plurality of vent holes arranged in an array and permit the rack to receive a sideways flow of cooling air into a first side of the rack through one of the vent hole arrays for cooling a heat-generating device mounted between the panels, and permit the rack to discharge a sideways flow of exhaust air through the other vent hole array. Each of the array of vent holes may manifest a honeycomb pattern of vent holes, and each of the vent holes may manifest an hexagonal shape. A cable management system includes a cable management rack for accommodating a heat generating device, a first baffle mounted with respect to a first upright of the rack and for redirecting a rearward flow of cool air sideways from a space adjacent a front side of the rack, and a second baffle mounted with respect to a second upright of the rack and for redirecting a sideways flow of exhaust air from the rack and through the second upright into a space adjacent a rear side of the rack. A method of cooling a heat-generating device mounted in or on a cable management rack includes providing a sideways flow of cooling air into the rack and into the device.