H3C S5810 Series, Руководство по эксплуатации

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Configuring Loopback Testing on an Ethernet Interface
You can enable loopback testing to check whether the Ethernet interface functions properly. Note that
no data packets can be forwarded during the testing. Loopback testing falls into the following two
categories:
z
Internal loopback testing, which is performed within switching chips to test the functions related to
the Ethernet interfaces.
z
External loopback testing, which is used to test the hardware functions of an Ethernet interface. To
perform external loopback testing on an Ethernet interface, you need to install a loopback plug on
the Ethernet interface. In this case, packets sent from the interface are received by the same
interface.
Follow these steps to enable Ethernet interface loopback testing:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Enable loopback testing loopback { external | internal }
Optional
Disabled by default.
z
As for the internal loopback test and external loopback test, if an interface is down, only the former
is available on it; if the interface is shut down, both are unavailable.
z
The speed , duplex , mdi , and shutdown commands are not applicable during loopback testing.
z
With the loopback testing enabled, the Ethernet interface operates in full duplex mode. With the
loopback testing disabled, the original configurations will be restored.
Enabling Auto Power Down on an Ethernet Interface
When an Ethernet interface does not receive any packet for a certain period of time, it automatically
enters the power save mode and resumes its normal state upon the arrival of a packet.
Follow these steps to enable auto power down on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter
Ethernet
interface view
interface interface-type
interface-number
Enter
Ethernet
interface view
or port group
view
Enter port
group view port-group manual
port-group-name
Use either command.
If configured in Ethernet
interface view, this feature
takes effect on the current port
only; if configured in port group
view, this feature takes effect
on all ports in the port group.
Enable auto power down on an
Ethernet interface
port auto-power-down
Required
Disabled by default