Our internet router often stops working at home, but for the the second time only I have got a pop-up error saying:

> 
> "another device is using your ip address".
> 
> 
> 

We have an iPhone and a Macbook but as far as a remember this problem occurred for a brief time when we were without an iPhone. In any case, I had a look at [this post](http://osxdaily.com/2010/09/19/another-device-on-the-network-is-using-your-computers-ip-address/) which suggests the problem is a cause of the iPhone and Macbook trying to use the same address. 

I changed the IP address via `System Preferences > Network > TCP/IP` > configure IPv4 `Using DHCP with manual address` to `11.11.11.11`. I then switched back to `Using DHCP` and clicked 'Renew DHCP Lease'. 

When I checked the IP address again it changed to `192.168.1.11`. It works now but I wonder if this is a permanent fix or will this problem keep occurring?

Update: The problem persists, but his time without the error message which would leads me to believe that there another problem in addition to the `"Another device is using your ip address"` problem.