3Com WX3000 operation manual Enabling the System to Test Connected Cable, Virtual-cable-test

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.

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	virtual-cable-test	Required
connected cables

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Optical port (including Combo optical port) does not support VCT (virtual-cable-test) function. Combo electrical port supports VCT function only when it is in UP condition (using undo shutdown command), normal Ethernet electrical port always supports 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-typeinterface-numbercommand 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		Optional
	flow-interval interval	By default, this interval is 300
statistical analysis on port traffic
		seconds.

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