Configuring The Ethernet Port To Run Loopback Test - Huawei Quidway S3100 Series Operation Manual

Operation Manual – Port
Quidway S3100 Series Ethernet Switches
Operation
Configure the system
to run
detection
VLANs for the trunk
and hybrid ports
Display port loopback
detection information
Caution:
To enable loopback detection on a specific port, you must use the
loopback-detection enable command in both system view and the specific port
view.
After you use the undo loopback-detection enable command in system view,
loopback detection will be disabled on all ports.

1.2.9 Configuring the Ethernet Port to Run Loopback Test

You can configure the Ethernet port to run loopback test to check if it operates normally.
The port running loopback test cannot forward data packets normally. The loopback
test terminates automatically after a specific period.
Table 1-11 Configure the Ethernet port to run loopback test
Enter system view
Enter Ethernet port view
Configure the Ethernet port to
run loopback test
After you use the shutdown command on a port, the port cannot run loopback test. You
cannot use the speed, duplex, mdi and shutdown commands on the ports running
loopback test. Some ports do not support loopback test, and corresponding prompts
will be given when you perform loopback test on them.
loopback
loopback-detection
on all
per-vlan enable
display
loopback-detection
Operation
Huawei Technologies Proprietary
Chapter 1 Basic Port Configuration
Command
Optional
By default, the system runs
loopback detection only on
the default VLAN for the
trunk and hybrid ports.
Optional
You can use the command in
any view.
Command
system-view
interface
interface-number
loopback { external | internal }
1-9
Remarks
Remarks
—
interface-type
—
Optional