Interface Configuration
80
Instruction Manual - NXA-ENET8-POE+
Perform these steps to display the load-distribution method used by ports in aggregated links:
1.
Click
Interface
>
Trunk
>
Load Balance
.
2.
Select the required method from the Load Balance Mode list.
3.
Click
Apply
.
Saving Power
Use the Interface > Green Ethernet page to enable power savings mode on the selected port.
Command Usage
IEEE 802.3 defines the Ethernet standard and subsequent power requirements based on cable connections operating at
100 meters. Enabling power saving mode can reduce power used for cable lengths of 60 meters or less, with more
significant reduction for cables of 20 meters or less, and continue to ensure signal integrity.
The power-saving methods provided by this switch include:
Power saving when there is no link partner:
Under normal operation, the switch continuously auto-negotiates to find a link partner, keeping the MAC interface powered
up even if no link connection exists. When using power-savings mode, the switch checks for energy on the circuit to
determine if there is a link partner. If none is detected, the switch automatically turns off the transmitter, and most of the
receive circuitry (entering Sleep Mode). In this mode, the low-power energy-detection circuit continuously checks for
energy on the cable. If none is detected, the MAC interface is also powered down to save additional energy. If energy is
detected, the switch immediately turns on both the transmitter and receiver functions, and powers up the MAC interface.
Power saving when there is a link partner:
Traditional Ethernet connections typically operate with enough power to support at least 100 meters of cable even though
average network cable length is shorter. When cable length is shorter, power consumption can be reduced since signal
attenuation is proportional to cable length. When power-savings mode is enabled, the switch analyzes cable length to
determine whether or not it can reduce the signal amplitude used on a particular link.
NOTE:
Power savings can only be implemented on Gigabit Ethernet ports when using twisted-pair cabling. Power-savings mode on a
active link only works when connection speed is 1 Gbps, and line length is less than 60 meters.
The following table lists the options on this page:
Perform these steps to enable power savings:
1.
Click
Interface
>
Green Ethernet
.
2.
Mark the
Enabled
check box for a port.
3.
Click
Apply
.
FIG. 77
Configuring Load Balancing
Interface - Trunk Load Balance Options
Port
Power saving mode only applies to the Gigabit Ethernet ports using copper media. (Range: 1-8/
22/24/48)
Power Saving Status
Adjusts the power provided to ports based on the length of the cable used to connect to other
devices. Only sufficient power is used to maintain connection requirements. (Default: Enabled on
Gigabit Ethernet RJ-45 ports)
FIG. 78
Enabling Power Savings