Reference Guide

Ports 275
Green Ethernet Configuration
Green Ethernet is a name of a set of features that are designed to reduce the
power consumption of a device, and so make it environmentally friendly.
The Green Ethernet feature reduces overall power usage in the following
ways:
• Energy Efficient Ethernet — When using EEE, systems on both sides of
the link can disable portions of their functionality and save power during
periods of low link utilization. EEE is a hardware feature that is enabled by
default, and is transparent to users.
This feature is defined per port,
regardless of their LAG membership.
• Link Short-Reach Energy Saving Mode — Power usage is adjusted to the
actual cable length. In this mode, the VCT (Virtual Cable Tester) length
test is performed to measure cable length. If the cable is shorter than a
predetermined length, the switch reduces the power used to send frames
over the cable, thus saving energy. This mode is only supported on RJ45
ports.
•
Energy Detect Mode — Power savings and current power consumption in
Short Reach mode 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 above two energy saving modes must be enabled globally and then
configured per port.
Green Ethernet Configuration
To configure Green Ethernet settings:
1
Click Switching > Ports > Green Ethernet Configuration in the tree view
to display the
Green Ethernet Configuration: Summary page.
2 The amount of energy saved from the last switch reboot is displayed in the
Cumulative Energy Saved field. This value is updated each time there is
an event that affects power saving. Click
Reset to reset its value.
3 Enter the fields:
•
Energy Efficient Ethernet — Globally enable/disable the Energy
Efficient Ethernet feature.