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virtual-cable-test
Function
The virtual-cable-test command tests the cable connected to an Ethernet electrical interface and displays the test result.
Usage Guidelines
Usage Scenario
You can run the virtual-cable-test command to check whether the cable works properly. According to the command output, you can locate and rectify cable faults.
- If the cable works properly, the total length of the cable is displayed.
- If the cable cannot work properly, the distance between the interface and the fault point is displayed.
Precautions
- Only the electrical interface or combo interface working as an electrical interface support the VCT function.
On the AC6800V and ACU2, GE electrical interfaces do not support the cable test function. On the AC6508 and AC6507S, only GE1 and GE10 interfaces support the cable test function.
- Running the virtual-cable-test command may affect services on the interface in a short period of time.
- The VCT function is supported only when the local and peer ends work at 1000 Mbit/s in auto-negotiation mode.
When the cable works properly, the VCT function is not supported by the AC6805, AC6005 and AC6003. The cable length is 0 in the command output of interfaces.
- If the cable cannot work properly, the distance between the interface and the failure point is displayed.
- The test result is only for reference and may be inaccurate for cables of some vendors.
- VCT detection cannot be performed on multiple interfaces of the device at the same time.
- For wire sequence of cables, see Testing the Connection of Assembled Cables in the Hardware Installation and Maintenance Guide.
Example
# Test the cable connected to GE0/0/1.
<AC6605> system-view [AC6605] interface gigabitethernet 0/0/1 [AC6605-GigabitEthernet0/0/1] virtual-cable-test Warning: The command will stop service for a while. Continue? [Y/N]y Pair A length: 4 meter(s) Pair B length: 4 meter(s) Pair C length: 4 meter(s) Pair D length: 4 meter(s) Pair A state: Ok Pair B state: Ok Pair C state: Ok Pair D state: Ok
Table 5-11 Description of the virtual-cable-test command output
Item |
Description |
|---|---|
Pair A/B/C/D |
Four pairs of circuits in a network cable. |
Pair A length |
Length of a network cable:
|
Pair A state |
Network cable status:
|
