@crispyoz
Well, this is a little embarrassing. I desoldered the connector and connected a different type connector. Even with shabby soldering it's working now. I just did not think a brand new ethernet connector would be faulty, that's my bad.
Thank you all for your help.

@JeffZhou
there was a product link in my original post but here, these are the only two pages from the datasheet;

@UFD alright, thank you

Hello, I have a small question probably obivous but I want to make sure.
Datasheet says SW_RST is used to reset operating system and it's active high.

This schematic if from Reference Schematics document.
As far as I know these tact switches connects 1-2 and 3-4 when pressed and 1-3, 2-4 does not connect on default but in that case schematic looks weird.
In short my question is if I want nothing to do with SW_RST pin can i leave it floating or do i need to pull it down?

@crispyoz
Well, this is a little embarrassing. I desoldered the connector and connected a different type connector. Even with shabby soldering it's working now. I just did not think a brand new ethernet connector would be faulty, that's my bad.
Thank you all for your help.

@crispyoz
it's non-responsive like the latest ping attempts. I'm gonna try desolder the connector and change with a new one other than that I have no idea

@crispyoz
Alright, thanks for everything

@crispyoz sorry for the late reply.
These are the results to the commands;

I'm afraid my router does not have any led indicators for the ethernet ports.

@crispyoz
So sorry I messed got in a hurry did not switch the ethernet to the old device.

This is the result of the old device

@crispyoz As a side note, my laptop can connect to internet with the same cable on the same port

@crispyoz
Yeah I noticed the ipv4 difference before but I though that was just the problem not something that would lead me somewhere, i guess that was silly of me.
So before I read your last reply I started working on static ip myself. I've edited the /etc/config/network as the following;

As a result all of the pings failed, but I forgot to take a screenshot, after that I did the steps you posted changing the static ip, here's the result;

I don't know if it's expected but before setting the static ip ping to the router was responsive.

Here's the really embarrassing part for me, I thought I got ping responses with my old device but now this is the result;

I thought I disabled the wifi before but I probably did not. After this result I assigned a static ip to this device as well and now it doesn't get a response to the router ping too.

I'm sorry for claiming that my old device was working properly, but I'm sure it did before, in my old office (different router).

There is still the difference of not getting an auto ip but i guess the problem now lies in the router itself?

@crispyoz
First of all thank your for your guidance. Here are the ifconfig outputs;

The non-working device;

The working device;

Both connected to the same network and have the same ethernet design and components. Working one is Omega2+ the other is Omega2S+ if it makes a difference.

I'm quite inexperienced on the subject and we are nearing the friday evening here, I will try supply all the info you mentioned on Monday since I can't take the devices home.

Thank you.