I changed the cable. I changed the ethernet port. I changed the ethernet card. but always red.
Please go to Network -> WAN Link Manager -> choose red network and add failover rule:
I think, this is Your problem.
Unfortunately, it did not happen. I changed the modem, it did not happen again
eating the fallen is law in wolfness.
I’ll be for forty years a slave of the one who teaches me even only one letter.
problem is solved. the two addresses were the same ip address. when someone did the address 192.168.3.1.