1-3
To do…
Use the command…
Remarks
Enter Ethernet port 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 port operates in full duplex mode. With the
loopback testing disabled, the original configurations will be restored.
Enabling Auto Power Down on an Ethernet port
When an Ethernet port 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 port:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter
Ethernet port
view
interface interface-type
interface-number
Enter
Ethernet port
view or port
group view
Enter port
group view
port-group manual
port-group-name
Use either command.
If configured in Ethernet port
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 port
port auto-power-down
Required
Disabled by default
Configuring a Port Group
The devices allow you to configure some functions on multiple interfaces at a time by assigning the
interfaces to a port group in addition to configuring them on a per-interface basis. This is helpful when
you have to configure a feature in the same way on multiple interfaces.
A port group is created manually and the settings you made on it apply to all group member interfaces.
Note that even though the settings are made on the port group, they are saved on an interface basis
rather than on a port group basis. Thus, you can only view the settings in the view of each interface with
the
display current-configuration
command or the
display this
command.
Follow these steps to configure a manual port group:
