H3C MSR 20-20 Command Reference Manual page 185

Parameter None
Description Use the
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
command to enable the virtual cable test for an
virtual-cable-test
185