Green Ethernet Configuration - Dell PowerConnect 5524P User Manual

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.
• Short-Reach 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.
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.
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Dell PowerConnect 55xx Systems User Guide