I have a RB3011UIAS-RM, and until last night it has worked flawlessly. I come home last night after a storm, and the internet is out.
I go back to where the router is located, and I notice it isn’t powered on. I check the power brick, and it is outputting 24v as expected. I figured it might of gotten a surge from the storm, so I start to unplug all of the ethernet cables from it and all of a sudden it powers on, right after I unplug it from the modem.
I then plug it back into the modem, and it proceeds to power off. At this point I think it is the modem, so I plug it directly into a computer. I can connect to the internet, through the modem.
I can plug the modem into any other port of the modem, and the router stays on. Except for ETH1, it is the only one that doesn’t work. I also found out that if I use a switch between the modem and the router everything works as it did before.
Any idea what is going on? Can the router be RMAed?
Thanks!
While I don’t know the solution to your problem, this topic has piqued my curiosity. If it were me, I would first try connecting a PC to Ether1 and see if I got the same result. Next I would try a Crossover cable between the port and the modem. Next I would try manually setting the port speed and duplex to match the modem’s native port speed.
My initial thought would be that the port is either having an auto mdi/mdi-x issue, or an auto negotiation issue. Both would explain why a switch corrected the problem. It is possible that the router took a surge from the modem, which is why the Coax coming in is supposed to have a surge arrester attach and needs to be properly grounded.
If it proves correct, I’m not sure am RMA will be the right way to go. A surge is considered an “act of god” and if vary rarely covered by any warranty. you would need to contact support@mikrotik.com to get the official response on that.
Often after storm ports on Mikrotik devices if not burns out may work in 10mbit full duplex or half duplex mode. Thus check that port status in Winbox/Webfig with PC or another SW/Mikrotik device.
I wouldn’t think an auto-negotiation issue would cause the whole router to shut off.
If I understand correctly, this board features POE in. If this is on eth1 and is blown so that there is a current leak through the POE circuitry on that port, connecting a cable to peripherals that create a short circuit between the POE pins will get the power supply to overload and the router to shut down.
If the switch you added does not do that, it will allow you to use that port without issues. So your probably looking to a defective POE-in port because of the current surge. And I doubt that MT will cover such damage and accept a RMA…