Switch Is Only Reading Half Ethernet Cables
What can I practice if the Ethernet LED indicators on the Unmanaged Switch are off?
User Awarding Requirement
Updated 07-20-2021 09:30:46 AM 
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Sometimes, yous might find that only the power light is lit on your unmanaged switch when a DUT (device under test like a computer or a router) is connected to the switch, this trouble might be caused by non-standard cable, the speed negotiation failure between the switch and the DUT, or the switch might be malfunctional.
The troubleshooting reasons below are based on the status that the DUT is working fine when it's continued to your whole network without the switch.
Reason 1 The switch itself
Delight practice a exam: power on the switch---- use a good quality cable to connect two Ethernet ports(port seven and port v for instance, every bit shown below) on the switch and disconnect it from anything else---check if those 2 respective Ethernet lights will exist on.
If these two lights are on, delight get to reason two and reason 3.
Reason 2 The cable is of non-standard
Do a exam : connect your PC to the switch---force your PC'south NIC(Network Interface Bill of fare) to work in 10Mbps half-duplex----check if the Ethernet light is on( refer to Reason three pictures to choose 10Mbps half-duplex or Google search how to do this)
Consequence Assay:
1) if the Ethernet is on, information technology's very likely that the cable is not a standard cablevision. Please change different cables.
2) if the Ethernet light is not on, delight get to Reason 3.
Suggestion : make certain that you have a practiced quality cable with the wire cords clamped tightly to the crystal plug, following the EIA/TIA-568 standard.
Reason 3 Speed negotiation failure
Our unmanaged switch works in machine-negotiation fashion which usually requires that the PC'south NIC also negotiates the speed automatically---If no, they might not have a common speed to work with and will not connect to each other.
Suggestion : make certain that the NIC's speed is in 'machine mode' or try dissimilar speeds with different duplexes.
You lot might Google search how to practise this or refer to the following briefly:
Get to your PC's 'local surface area connexion'--correct click information technology---become to 'properties'----'configure' ----'advanced'----'media type' or 'speed and duplex' or 'link speed and duplex'---try 'auto-detect' or 'auto-mode' first; if no difference, try different speeds with unlike duplexes until you get one that will requite you lot the Ethernet light on the switch and also give yous a good speed.
If you take further problem, delight contact our support by support@tp-link.com.
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Source: https://www.tp-link.com/us/support/faq/736/
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