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Configuring VCT
You can use the Virtual Cable Test (VCT) function to check the status of the cable connected to an Ethernet
port on the device. The result is returned in less than 5 seconds. The test covers whether short circuit or
open circuit occurs on the cable and the length of the faulty cable.
The fiber port of a combo interface does not support this feature.
A link in the up state goes down and then up automatically if you perform this operation on one of the
Ethernet interfaces forming the link.
To test cable status:
1. Select Device > VCT from the navigation tree.
The page for testing cable status appears.
2. Select the port you want to test on the chassis front panel.
3. Click Test.
The test result is returned within five seconds and displayed in the Result area.
Figure 62 Testing the status of the cable connected to an Ethernet port
The result displays the cable status and length. The cable status can be normal, abnormal, abnormal
(open), abnormal (short), or failure.
• When a cable is normal, the cable length displayed is the total length of the cable.
• When a cable is abnormal, the cable length displayed is the length between the current port and
the location where fault occurs.
• The cable length detected can have an error of up to 5 m (16.40 ft).
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