Green Ethernet - Cisco SX350 Series Administration Manual

Port Management

Green Ethernet

Green Ethernet
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
• Refresh—Refresh the displayed counters.
The following operations can be performed by clicking View Interface History Graph:
• View Interfaces Statistics—Display the graph statistics for a selected interface in
table form. Enter the Time Span in hours, days, weeks or years.
• View All Interfaces Statistics—Display the above statistics for all interfaces in table
format. Enter the Time Span in hours, days, weeks or years.
This section describes the Green Ethernet feature that is designed to save power on the device.
It contains the following sections:
• Green Ethernet Overview
• Properties
• Port Settings
Green Ethernet Overview
Green Ethernet is a common name for a set of features that is designed to be environmentally
friendly, and to reduce the power consumption of a device. Green Ethernet is different from
EEE in that Green Ethernet energy-detect is enabled on all devices whereas only Gigabyte
ports are enable with EEE.
The Green Ethernet feature can reduce overall power usage in the following ways:
• Energy-Detect Mode—On an inactive link, the port moves into inactive mode, saving
power while keeping the Administrative status of the port Up. Recovery from this
mode to full operational mode is fast, transparent, and no frames are lost. This mode is
supported on both GE and FE ports. This mode is disabled by default.
• Short-Reach Mode—This feature provides for power savings on a short length of
cable. After cable length is analyzed, the power usage is adjusted for various cable
lengths. If the cable is shorter than 30 meter for Tengigabit ports and 50 meter for other
type of ports, the device uses less power to send frames over the cable, thus saving
energy. This mode is only supported on RJ45 GE ports; it does not apply to Combo
ports. This mode is disabled by default.
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