Hey everyone,
 

I’m having an issue and I could really use some help.
 

I’m currently trying to connect my TP-Link SG105S switch to the Archer C20 router that is being used here in the apartment. In my room I only have one LAN port, which is why I wanted to use the switch to provide internet to multiple devices.
 

The problem is:
Whenever I plug the LAN cable from the wall into the switch, the LED on the SG105S keeps blinking continuously, as if it’s detecting a loop or something similar.
 

Is there anything I need to enable or change on the router to stop this “loop” behavior?

Or what exactly is causing this issue?
 

For context:
The Archer C20 itself receives internet from a MEO GR141IG modem/router.
 

I would really appreciate any help or ideas on how to solve this problem.
 

Thanks in advance!