Operation Manual – Port Basic Configuration
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 1 Port Basic Configuration
Huawei Technologies Proprietary
1-10
Table 1-11 Configure the Ethernet port to run loopback test
Operation Command Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Configure the Ethernet port to
run loopback test
loopback { external | internal } Optional
Note:
z external: Performs external loop test. In the external loop test, self-loop headers
(which are made from four cores of the 8-core cables) must be used on the port of
the switch. The external loop test can locate the hardware failures on the port.
z internal: Performs internal loop test. In the internal loop test, self loop is established
in the switching chip to locate the chip failure which is related to the port.
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.
1.2.10 Enabling the System to Test Connected Cable
You can enable the system to test the cable connected to a specific port. The test result
will be returned in five minutes. The system can test these attributes of the cable:
Receive and transmit directions (RX and TX), short circuit/open circuit or not, the length
of the faulty cable.
Table 1-12 Enable the system to test connected cables
Operation Command Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the system to test
connected cables
virtual-cable-test
Required
1.2.11 Configuring the Interval to Perform Statistical Analysis on Port Traffic
By performing the following configuration, you can set the interval to perform statistical
analysis on the traffic of a port.
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