can dhcp server and default gateway be the same ip address

Gateway and  DHCP server with same  IP addresses is a nice convenience because we dont have to concern about configuring the network settings on all of the devices on your network; the DCHP server does it for us

Hi,

Yes, you can. In most cases, the router that acts as the default gateway for TCP/IP hosts. If the DHCP server is the router in a small network, the default gateway usually points to the IP address of the DHCP server. In addition, a router that acts as the default gateway needs to maintain this level of routing knowledge to reach other remote network segments in the larger internetwork, so when you use the DHCP server as the default gateway, you may also need to take the performance into account.

Best regards,

Susie

• Proposed as answer by Ace Fekay [MCT]MVP 3 hours 57 minutes ago

Brian, as others have responded, yes they can.

However, since the question is open ended and leaves some assumptions, I have some questions.

My main question is will your Windows Server be the gateway (possibly running RRAS and NAT), or will it be a hardware router device, such as a Linksys, Cisco ASA, etc?

If the Windows server is the gateway, then you can install DHCP on it to service the network. If it's a hardware device, then that can support DHCP, too.

My only take on it is if you have an AD (Active Directory) infrastructure, it's recommended to use Windows DHCP because it supports additional options that a device's DHCP doesn't, as well as that the DHCP APIs and DNS APIs work together to provide Secure DNS Dynamic Updates, which is important in AD.

And if the gateway is a Windows server, then it is recommended that it is not a DC (domain controller), because if it is a gateway, then it will have more than one NIC, and DCs do not play well with multiple NICs and will cause problems with AD.

if you are considering a hardware device, to act as a gateway and a DHCP server. then i think it should be fine.

but if you are considering an AD DC to be your DHCP and a gateway, then you can try see how it goes. 

But Ace reply, stated that AD does not play well in multiple NICs. Then I guess just give it a shot if you want to have an infrastructure like that.