185
Parameter None
Description Use the
virtual-cable-test command to enable the virtual cable test for an
Ethernet interface and to display the testing result. The tested items include:
■ Cable status: Could be normal, abnormal, abnormal-open, abnormal-short,
and failure;
■ Cable length;
■ Pair Impedance mismatch;
■ Pair skew;
■ Pair swap;
■ Pair polarity;
■ Insertion loss;
■ Return loss;
■ Near-end crosstalk.
By default, virtual cable test is disabled.
Note:
■ When the cable is functioning properly, the cable length in the test result
represents the total cable length;
■ When the cable is not functioning properly, the cable length in the test result
represents the length from the current interface to the failed position.
n
■ The optical interface of a Combo port does not support this command.
■ A link in the up state goes down and then up automatically if you execute this
command on one of the Ethernet interfaces forming the link.
Example # Enable the virtual cable test for the interface Ethernet 1/0.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] virtual-cable-test
Cable status: abnormal(open), 7 metres
Pair Impedance mismatch: yes
Pair skew: 4294967294 ns
Pair swap: swap
Pair polarity: normal
Insertion loss: 7 db
Return loss: 7 db
Near-end crosstalk: 7 db
