Server 2012 R2, Cisco RV082
This is for a very small network system where the DC's have to be shutdown periodically for a day or so. 2 DC's exist & are also acting as DHCP servers. It's a temporary physical constraint that is being worked on for a resolution. In the meantime it is desired to be able to plug into the network and gain internet access when the DHCP servers are not operating -- without having to go into the router and reconfigure it each time.
Is it possible to engage the router's DHCP for a small set of addresses for those periods when the DC's are offline and keep that from interfering with the DC DHCP servers when they are online? What I'm looking for is a technique or setup that will ensure the router doesn't serve IP's when the DC's are online and filling that role.
I am asking this question because in my study of ADDS/DNS/DHCP operation I thought I read where there are significant benefits to have all of this done by the servers and not have a router's DHCP operation interfere. For that reason I turned off the router DHCP, but if the DC's are offline, I need the router's DHCP. I want to know if and how I can turn the router DHCP back on without impacting server ADDS/DNS/DHCP operation when the DC's are online.