PLANET WGSW-52040 - Manual (Page 155)

4-154
Example:
Setting ports 1-8 allow 1000kbit broadcast packets per second.
Switch(config-if-port-range)#storm-control broadcast kps1000
4.1.17 virtual-cable-test
Command:
virtual-cable-test interface ethernet
Function:
Test the link of the twisted pair cable connected to the Ethernet port. The response may include: well, short, open, fail.
If the test information is not well, the location of the error will be displayed (how many meters it is away from the
port).
Parameter:
: Port ID
Command Mode:
Admin Mode.
Default Settings:
No link test.
Usage Guide:
The RJ-45 port connected with the twisted pair under test should be in accordance with the wiring sequence rules of
IEEE802.3, or the wire pairs in the test result may not be the actual ones. On a 100M port, only two pairs are used: (1,
2) and (3, 6), whose results are the only effective ones. If a 1000M port is connected to a 100M port, the results of (4,
5) and (7, 8) will be of no meaning. The result may have deviations according to the type of the twisted pair, the
temperature, working voltage and other conditions. When the temperature is 20 degree Celsius, and the voltage is
stable without interference, and the length of the twisted pair is not longer than 100 meters, a deviation of +/-2 meters
is allowed. When the port is at Link UP status, a deviation of +/-10 meters is allowed. Notice: the test procedure will
block all data flow on the line for 5-10 seconds, and then restore the original status.
Notice: combo port supports VCT function detection only at copper cable port mode, 100M port does not diagnose
the link length at Link UP status.
568A wiring sequence: (1 green white, 2 green), (3 orange white, 6 orange), (4 blue, 5 blue white), (7 brown white, 8
brown).
568B wiring sequence: (1 orange white, 2 orange), (3 green white, 6 green), (4 blue, 5 blue white), (7 brown white, 8
brown).