Virtual-Cable-Test - 3Com S7906E Command Reference Manual

virtual-cable-test

Syntax
virtual-cable-test
View
Layer 2 Ethernet interface view
Default Level
2: System level
Parameters
None
Description
Use the virtual-cable-test command to test the cable connected to the Ethernet interface once and to
display the testing result. The tested items include:
Note that:
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.
The optical interface of a Combo port does not support this command. The support of other
Ethernet interfaces for this command varies with device models.
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.
The test result is for your information only. The maximum error in the tested cable length is 5 m. A
hyphen "-" indicates that the corresponding test item is not supported.
Examples
# Enable the virtual cable test for the interface Ethernet 2/0/1.
<Sysname> system-view
[Sysname] interface ethernet 2/0/1
[Sysname-Ethernet2/0/1] virtual-cable-test
Cable status: normal, 1 metres
Pair Impedance mismatch: -
Pair skew: - ns
Pair swap: -
Pair polarity: -
Insertion loss: - db
Return loss: - db
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