IT networking gear goes green

Computerworld - Servers get most of the glory when it comes to energy management, however networking gear is about to catch up.

The past year

Over the past year, network equipment vendors have begun to emphasize energy-efficiency features, something that was never a top priority earlier, says Dale Cosgro, a product manager in Hewlett-Packard Co.'s ProCurve network products organization.

Networking infrastructure isn't in the same class as servers or storage in terms of overall power consumption -- there are far more servers than switches -- now networking can account for up to 15% of the total power budget.

And unlike servers, which have sophisticated power management controls, networking equipment must always be on and ready to accept traffic.

Also, networking power use at the rack level is significant. A Cisco Catalyst 6500 series switch consumes as much as 2kW to 3kW per 42U-high rack. Cisco Systems Inc.'s largest enterprise-class switches, the Nexus 7000 series, can consume as much as 13kW per rack, according to Rob Aldrich, an architect in Cisco's advanced services group. A 13kW cabinet generates more heat than many server racks -- enough that it requires careful attention to cooling.