Chapter
3: Web Management
Power Reduction - EEE
NGSME24G4S User Manual | 37
3.1.2. Configuration - Power Reduction
3.1.2.1. Power Reduction - EEE
EEE (Energy-Efficient Ethernet) is a power saving option that reduces the power usage when
there is low or no traffic utilization by powering down circuits when there is no traffic. When a
port gets data to be transmitted all circuits are powered up. The time it takes to power up the
circuits is named wakeup time. The default wakeup time is 17 us for 1Gbit links and 30 us for
other link speeds.
EEE devices must agree upon the value of the wakeup time in order to make sure that both
the receiving and transmitting device has all circuits powered up when traffic is transmitted.
The devices can exchange wakeup time information using the LLDP protocol.
EEE works for ports in auto-negotiation mode, where the port is negotiated to either 1G or
100 Mbit full duplex modes.
Ports that are not EEE-capable are grayed out and thus impossible to enable EEE.
The EEE port settings relate to the currently selected stack unit, as reflected by the page
header.
Port
The switch port number of the logical EEE port.
Enabled
Controls whether EEE is enabled for this switch port.
Buttons
Save:
Click to save changes.
Reset:
Click to undo any changes made locally and revert to previously saved values.