Hi, I have a strange issue. I have tried to troubleshoot myself but I'm stuck at the moment. 

The setup:

I have 3 deco X55, two 8 port switches, lots of devices connected with cable and on WiFi. 

I have a scheduled restart three times a week. 

Background to the problem:

Usually no problems with the setup, works flawlessly. But all of a sudden after a restart I have experienced problems with my routers MAC adress being locked with the ISP and this also means it used up the five Ip-addresses I get until I have to wait out the release time (12h in my case.)

Latest problem:

I thought this was the same problem, but it didn't work to disconnect from the port and wait the release time out. 

After rebooting, i notice that some of my devices give me a notification of going online, but then it goes offline within a minute or two. 

When I check the status, everything seem to be there, I seem to have an ip-address but it still shows Internet status as offline. 

Tried to reboot a few times without luck. At one time same thing happened, worked for a minute or two to stop working. 

I haven't changed anything, that's the strange part. I just woke up yesterday with this problem in my hand. 

I have tried the cable from WAN directly to a laptop, works without any problems. 

ISP says no problems in my area. 

So my best guess it's something that is strange with the router, I don't know where to continue the trouble shooting without a factory reset, I would rather avoid that part. 

But as mentioned, nothing changed, except a restart.