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Forum Discussion
Switches indicate receiving signal, not detecting devices
I have had a GS316EP for 4 years. It was used to power 2 PoE cameras and for my home office. About a month ago, it stopped working. When I plug the Cat 5e from the router into each port, they light up and I can check the status when I access the switch via the IP address. It shows 1 connection, despite there being at least 3 others attempting to pull/send data.
I purchased a GS3116PP Unmanaged Switch to replace it, thinking it was a dead switch, and it is doing the same thing. I have changed the cord from the router, trying a different cat 5e and a cat 6. No improvement.
Firmware has been updated on the managed device. The unmanaged device was left plugged in for over an hour, despite instructions claiming it should only take 2 minutes.
Any help would be appreciated.
9 Replies
Factory reset (default) the GS316EP, ensure the correct power supply is plugged.
Are the connected devices in question PoE powered?
Do non-PoE Ethernet devices connected show both Link and activity?
The GS316EP is about a 200 W capable unit, 54V, delivering up to about 3.7 A, best guess, the GS316PP power supply is the very similar 200 W unit, 54V, 3.7A.
Switches indicate receiving signal
So what signals are you talking about please?
Factory reset did not fix the problem.
The only device indicating that is connected and active is the router. No other devices have any indication of activity.
Power supply is the factory power supply that came with the switch. The indicators that I can see are the Power LED and the Left Port LED for the port coming from the router. There are no other LEDs lighting up and none of my other devices are receiving internet or power from the switch.
There are two PoE camera which are not receiving power or internet and my PC, which is not getting internet signal either.
Tastes like either the two PoE all other Ethernet connected devices are defective (extreme unlikely, isn't it?) - or this GS316PP is DoA (uncommon, but happens).
As a test, try the power supply of the previous GS316EP on the GS316PP, as all supplies the same voltage. For just the switch operations and supplying PoE to just two 802.3af or 802.3at PD, this seems sufficient.
The GS316EP is about a 200 W capable unit, 54V, delivering up to about 3.7 A, best guess, the GS316PP power supply is the very similar 200 W unit, 54V, 3.7A.
That's what I think too. But I am wondering if the original power brick is failing
I have tried the power brick for the original switch and the replacement switch, both of which provide the same capacity and are meant for PoE switches. The other switch is just unmanaged (also has the same issues).
When you swapped the switches, did you also use the new power adapter with the new one? Or did you just plug in the old one?
Does disconnecting the two PoE clients make any difference in the symptoms?
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