01-04-2023 03:32 PM
Hi,
I am currently running a Cisco Business CBS110-16T-D 16 port Unmanaged Switch ona small network. The network was cabled with Cat 6a cable, and ports and connectors added by the installer. A majority of the ports displayed a solid amber light, after some diagnosing it turned out that the connectors did not have all the cores displaying, this was then correct by the installer. All the connections on the switch appear to work, and have an internet connection, however, they continue to display a solid amber light. The light goes away, with both lights on the switch turning green and flashing green when a device is plugged in on the other end. However, when there is no device, the switch again displays a solid amber light, we have be baffled by what this could be and have struggled to find answers online, there are a few cables which do not show the amber light when not in use, which were also setup with the same connectors as the others, so we are struggling to diagnose the issue. It was suggested it could be noise from the other cables nearby as multiple cables go through a conduit together, though I am not sure if this is correct?
Thank You for your help and advice.
01-04-2023 11:35 PM
- Check port configurations, for 'user ports' , use mode access (could be related to invalid SPT negotiations)
M.
01-14-2024 10:40 PM
Any resolution to this? I have the same problem on a couple of ports.
01-28-2024 10:46 AM
Hey, I never really found a solution for this. Thankfully though, it hasn't seemed to have caused any issues and has been working as it should, and I pray it continues to work okay. One of the theories I heard from someone was that the switch is just very sensitive to noise on the line, and it could be picking that up, where when I plugged in a switch from another manufacturer with the same connections, it didnt seem to show anything.
01-28-2024 12:57 PM
Hello @Goji ,
according to the documentation, each port has 2 LED's - left one LNK/ACT and right one POE.
I'm assuming that you are talking about the right LED. The documentation also states that:
the LED is AMBER if a POE capable device is connected to the port
the LED is OFF if no device is connected
More than that, your device CBS110-16T-D I am almost sure that is not POE capable (almost because I couldn't find the exact model in Cisco documentation, the closest being CBS110-16T) - another reason to have the LED off.
Anyway, it shouldn't influence the normal operation of the switch in my opinion.
Hope it helps.
01-28-2024 02:18 PM
01-28-2024 02:43 PM
For the left LED turning AMBER STEADY, the documentation states "Cable has errors".
You are sing this behaviour on just 2 ports? What are the number of the ports?
When you say "nothing is connected to the other end" you mean disconnecting the far end right? Leaving a patch cord connected to the switch port, which patch cord goes to a patch panel, cabling system, another patch panel, patch cord and finally the end device. Correct?
Can you try a simple test? Switch-----patch cord-------end device
Is the behaviour of the LED the same?
01-28-2024 03:31 PM
01-28-2024 03:56 PM - edited 01-28-2024 04:00 PM
So, if the switch port has nothing connected, the LED is off as it should be.
If the switch port is connected to the patch panel/house runs, the LED is AMBER.
My conclusion is that, I don't know for what reason, the switch is "complaining" about the cabling - patch panels/house runs. I'm not saying the switch is correct, but this is what I'm seeing.
There is one last and relatively simple test you can perform - if you have a really log patch cord, length under 100 meters - if you have some CAT5e you can crimp the RJ45 connector on it - to connect the switch to the end device and see what happens. This way you completely eliminate the patch panels and cable runs.
01-28-2024 05:06 PM
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