Internet on and off Server 2008r2

[bobcatgeek]

My internet goes on and off without any changes to domain. Tested incoming internet line and equipment. Could this be a DHCP issue. I run a single server with DNS and DHCP and AD on it. It doesn't seem to be a wireless access point issue since it happens at all points of the network.

 

[Emerald]

is the server the only source for DHCP or is the router sending out DHCP too?