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Enabling energy saving features on an Ethernet interface
About energy saving features on an Ethernet interface
With Energy Efficient Ethernet (EEE) enabled, a link-up interface enters low power state if it has not
received any packet for a period of time. The time period depends on the chip specifications and is
not configurable. When a packet arrives later, the device automatically restores power supply to the
interface and the interface restores to the normal state.
Restrictions and guidelines
Fiber ports do not support this feature.
Configuring EEE on an Ethernet interface
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Enable EEE on the Ethernet interface.
eee enable
By default, EEE is disabled on an Ethernet interface.
Setting the statistics polling interval
About statistics polling interval
To display the interface statistics collected in the last statistics polling interval, use the display
interface
command. To clear the interface statistics, use the reset counters interface
command.
Setting the statistics polling interval in Ethernet interface view
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Set the statistics polling interval for the Ethernet interface.
flow-interval interval
By default, the statistics polling interval is 300 seconds.
Enabling loopback testing on an Ethernet interface
About loopback testing
Perform this task to determine whether an Ethernet link works correctly.
Loopback testing includes the following types:
• Internal loopback testing—Tests the device where the Ethernet interface resides. The
Ethernet interface sends outgoing packets back to the local device. If the device fails to receive
the packets, the device fails.
• External loopback testing—Tests the hardware function of the Ethernet interface. The
Ethernet interface sends outgoing packets to the local device through a self-loop plug. If the
device fails to receive the packets, the hardware function of the Ethernet interface fails.
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