display virtual-cable-test

Function

The display virtual-cable-test command displays the last cable test result on an Ethernet electrical interface.

The following switch models and interfaces do not support this command:

Multi-GE interfaces on the S5720-28X-PWH-LI-AC, S5732-H24UM2CC, S5732-H48UM2CC, S6720-32C-SI-AC, S6720-32C-SI-DC, S6720-32C-PWH-SI-AC, S6720-32C-PWH-SI, S6720-52X-PWH-SI, S6720-56C-PWH-SI-AC, and S6720-56C-PWH-SI
XGE electrical interfaces on the ES5D21X08T00 card

Format

display virtual-cable-test interface-type interface-number

Parameters

Parameter	Description	Value
interface-type interface-number	Displays cable test results on a specified interface. This parameter can be configured after a GE optical interface has a GE copper module installed. This parameter can be configured after an XGE optical interface has a GE copper module installed. After a 25GE optical interface is configured to work at the rate of 1 Gbit/s using the port mode ge command and has a GE copper module installed, the virtual-cable-test command can be configured on the interface.	-

Parameter

Description

Value

interface-type interface-number

Displays cable test results on a specified interface.

This parameter can be configured after a GE optical interface has a GE copper module installed.

This parameter can be configured after an XGE optical interface has a GE copper module installed.

After a 25GE optical interface is configured to work at the rate of 1 Gbit/s using the port mode ge command and has a GE copper module installed, the virtual-cable-test command can be configured on the interface.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

A cable test detects faults on the cable connected to an interface. If the cable is working properly, the test result displays the total length of the cable. If the cable cannot work properly, the test result displays the distance between the interface and the failure point.

The test result is only for reference and may be inaccurate for cables of some vendors.

Example

# Display the cable test result on Ethernet electrical interface GE0/0/1.

<HUAWEI> display virtual-cable-test gigabitethernet 0/0/1
VCT test last ran on: 2013-7-12 21:25:13     
Pair A length: 189meter(s)
Pair B length: 189meter(s)
Pair C length: 189meter(s)
Pair D length: 189meter(s)
Pair A state: Ok
Pair B state: Ok
Pair C state: Ok
Pair D state: Ok  
Info: The test result is only for reference.

**Table 1** Description of the **display virtual-cable-test** command output
Item	Description
VCT test last ran on	Time when the last VCT test was performed on an interface. NOTE: When the daylight saving time (DST) is not used, the system displays the following information: VCT test last ran on: 2013-7-12 21:25:13. When the DST is used, the system displays the following information: VCT test last ran on: 2013-7-12 21:25:13 DST.
Pair A length	Length of a network cable. The length is the distance between the interface and the faulty point if a fault occurs. The length is the actual length of the cable when the cable works properly. The length is the default length 0 m if the interface is not connected to any network cable. NOTE: If the cable length is displayed as Unknown, the cable status is OK, but the cable length test result cannot be used.
Pair A state	Status of a circuit pair of the cable: Ok: indicates that the circuit pair is terminated normally. Open: indicates that the circuit pair is not terminated. Short: indicates that the circuit pair is short-circuited. Crosstalk: indicates that the circuit pairs interfere with each other. Unknown: indicates that the circuit pair has an unknown fault.

Pairs A, B, C, and D are the four pairs in a cable.