I have received a Raspberry Pi 4 Model B, and have been using it for several weeks. I had installed OpenWRT(21.02.1) on one of my MicroSD cards and had put it into my pi. I don't have an external monitor, so I run headless ssh via ethernet connected to my laptop. This time, the lights to the bottom left and right of the ethernet port of the pi are flashing green or red(sorry, I'm color blind) for about 5 seconds on, and 10 seconds off. I have tried switching power sources, ethernet cables(also I have made sure that they are plugged in correctly), MicroSD cards(without OpenWRT), and restarting both computer and pi.
Sorry if I wasn't previously clear about my problem, but it is that the ethernet connection between my computer and raspberry pi is disconnecting for 10 seconds after 5 seconds of being connected.
I don't really know what is happening, and any help would be much appreciated.