We bought a RB2011iL-IN router serial no. 554C045A674D/444 on 10-12-2017 and we have a very strange problem. The unit is connected as a router giving internet connection on ether1 port. A pc is connected to ether2 port and a NAS is connected to Ether3. It has only these connections. No switch or wifi access point connected. All we have to do is to share NAS over ftp and use pc for downloads and uploads. Heavy internet traffic will be there. Bandwidth is 70MB for download and 20MB upload. It worked for the first day with all function looks good. But from yesterday, the we started uploading and downloading on PC, the connection is losing. We could not upload or download as the file sizes were big. It gets stopped after a while. We thought of a configuration problem and reset to factory default with reset switch and did only configure router. No NAS connected and only PC connected with the router. We have same issue. The internet is not steady.When opening 188.8.131.52 to check the web config if we switch between tabs Quick Set / WebFig / Terminal, it stops after some time and will not get the page for some time. After refreshing few times, when checking the Quick set page we see no ip address and IP and gateway shows 0.0.0.0 with red colour. The internet is functioning normal when connecting to the computer. What could be the issue.