Cisco SR224T Administration Guide - Page 112

Port Management Configuring Green Ethernet 9 These modes are configured per port, without taking into account the LAG membership of the ports. The device LEDs are power consumers. Since most of the time the devices are in an unoccupied room, having these LEDs lit is a waste of energy. The Green Ethernet feature enables you to disable the port LEDs (for link, speed, and PoE) when they are not required, and to enable the LEDs if they are needed (debugging, connecting additional devices etc.). On the System Summary page, the LEDs that are displayed on the device board pictures are not affected by disabling the LEDs. Power savings, current power consumption and cumulative energy saved can be monitored. The total amount of saved energy can be viewed as a percentage of the power that would have been consumed by the physical interfaces had they not been running in Green Ethernet mode. The saved energy displayed is only related to Green Ethernet. The amount of energy saved by EEE is not displayed. 802.3az Energy Efficient Ethernet Feature This section describes the 802.3az Energy Efficient Ethernet (EEE) feature. It covers the following topics: • 802.3az EEE Overview • Advertise Capabilities Negotiation • Link Level Discovery for 802.3az EEE • Availability of 802.3az EEE • Default Configuration • Interactions Between Features • 802.3az EEE Configuration Workflow 802.3az EEE Overview 802.3az EEE is designed to save power when there is no traffic on the link. In Green Ethernet, power is reduced when the port is down. With 802.3az EEE, power is reduced when the port is up, but there is no traffic on it. 802.3az EEE is only supported on devices with GE ports. Cisco Small Business 200 Series Smart Switch Administration Guide 113