H3C Technologies H3C S3600 Series Switches - Manual (Page 168)

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z You cannot use the speed, duplex, mdi and shutdown commands on the ports running loopback
test.
z Some ports do not support loopback test, and corresponding prompts will be given when you
perform loopback test on them.
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 seconds. 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.
Follow these steps to enable the system to test connected cables:
To do... Use the 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
SFP ports do not support this function.
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.
When you use the display interface interface-type interface-number command to display the
information of a port, the system performs statistical analysis on the traffic flow passing through the port
during the specified interval and displays the average rates in the interval. For example, if you set this
interval to 100 seconds, the displayed information is as follows:
Last 100 seconds input: 0 packets/sec 0 bytes/sec
Last 100 seconds output: 0 packets/sec 0 bytes/sec
Follow these steps to set the interval to perform statistical analysis on port traffic:
To do... Use the command... Remarks
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Set the interval to perform
statistical analysis on port
traffic
flow-interval interval
Optional
By default, this interval is 300
seconds.