Just rasing this again as I've posted it in a solved thread that may not be seen..
I've installed a rpi3 and assigned a reserved IP address within google wifi for it, the problem is whenever the PI reboots it gets another IP address and ignores the reserved IP. I figure this is because there are now two DHCP servers running. (google + huwahei) I tried disabling DHCP in the huwahei router but then I lost all internet. Any ideas of how DHCP from the huwahei HG659 router can be either disabled another way or ignored?