LAN Port LED Colors: Understanding Meaning, Flashing Frequency & Network Indications

Question

As in the topic, I'm interested in a theory that I can not find in the network, what do the LEDs in the LAN ports mean, what do the colors mean and does the flashing frequency also mean something? Thanks.

m.jastrzebski · Answer

This is what the manufacturer of the card intended. There is probably no standard.

salmon · Answer

There is no clear answer to this question because there is no defined standard. In the manual for a specific device, you will find what the different LED states mean.

excray · Answer

In my opinion, green blinks when a packet arrives at the card, and orange blinks when a packet comes out of the card. Or vice versa

przeqpiciel · Answer

Most often, the colors indicate what speed has been negotiated on a given port 10/100/1000, depending on what the model offers, and, as already written, what you will find in the manual.
No dependency on which way the packet is going.

rauli · Answer

I thought that there are just predefined color combinations for the speed data, and since there is no, and it depends on the manufacturer of the device, then maybe so little information
on the internet about this. Nevertheless, if someone has knowledge and information about their device that they use and expresses themselves here, please let me know what it looks like in a given case.
I will check the technical data of my album and maybe I'll find out something, let me know.

przeqpiciel · Answer

In addition to the LAN port, you often have 2 LEDs. One from the so-called Link, meaning that both LAN ports on the cable get along, and the other one flashes Active, probably when a packet collision occurs, but it is ringing somewhere and I'm not sure if I have a good association.

rauli · Answer

This is what I mean, I have two LEDs, one, for example, is red and the other is flashing orange, but sometimes green, I'm sure that this applies to speed, but I do not know what color to what speed and whether the left one can also change color etc. , etc.

salmon · Answer

Well, not really, it signals the transmission on the port. Find what layout represents the network interface on your card / board. Then look for the technical documentation of the system from the manufacturer. There is a 99% chance that no one wanted to penetrate the colors / combinations of LEDs and their description in the documentation will be consistent with reality (because it is also possible to change now, often even from the driver level, without penetrating the firmware of the system ).

przeqpiciel · Answer

Since you can observe changes in the color of the diode, I have a proposal for you.

I assume you are using Windows. Look at the control panel, go to the place where you have network cards.
xp - network connections
7 / vista - Network and Sharing Center
Go to the properties of the network card, select the configure button, then the advanced tab. Here you should have a list of various settings from which you are interested in the link speed item - for me Link Speed & Duplex with Auto negotiation value.
Switch to 10 / full duplex, 100 / full duplex, 1000 / full duplex. Watching the changes.

Maybe this will satisfy your curiosity.

rauli · Answer

I will try to do that, thanks.

rauli · Answer

I found a solution, such a schematic satisfied me and resolved my doubts, maybe someone who is also as inquisitive as me will help.

LAN Port LED Colors: Understanding Meaning, Flashing Frequency & Network Indications

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