Disabling DHCP on router

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Tomaso90

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Jun 30, 2012
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Hi, thanks for stopping by.
I am configuring a Windows Server 2012 r2 on my network and am using it as an Active Directory, DNS and DHCP server. All this to create a domain in my environment. I was just wondering what will happen to my wireless devices, like my iphones and ipads, when DHCP is disabled on my router?
Thanks
 
Solution
George Phillips
That definitely can work. Just designate different ranges of IP addresses for each pool managed by each DHCP server if the DHCP servers were to run in the same network subnet.

If both DHCP servers are assigned to different networks, any further configuration is not even needed.

And yes, I personally advise to keep it as simple as possible in a small network. A simpler solution is usually the best solution.
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George Phillips

George Phillips

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Jun 17, 2015
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Windows Server 2012 won't automatically offer DHCP service that needs to be configured.

If the DHCP service is disabled on the router, you could set the IP for each PC manually. I am not sure how your iDevices will behave.

I suggest to still enable DHCP on the router but only reserve half of the IP addresses of the network for the DHCP on the router to manage. For the unused other IP addresses, they can be assigned for Windows Server 2012 to manage them through DHCP Service configured on WS2012.
 
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bill001g

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Aug 9, 2012
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How would you ever expect this to work and what purpose do you envision it having to have 2 dhcp servers active on a subnet. The normal thing that happens is you get completely random selection of dhcp pools. Both DHCP server will offer a IP to ever request they hear the PC will select one it likes normally the first it happens to get.

It technically will work if you configure it correctly but why would you ever do this in a small network.

The reason you generally use the windows server to do DHCP are all the other features like dynamic registration of clients to DNS and such that the server can provide that a router can not.
 
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George Phillips

George Phillips

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Jun 17, 2015
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That definitely can work. Just designate different ranges of IP addresses for each pool managed by each DHCP server if the DHCP servers were to run in the same network subnet.

If both DHCP servers are assigned to different networks, any further configuration is not even needed.

And yes, I personally advise to keep it as simple as possible in a small network. A simpler solution is usually the best solution.
 
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Solution
George Phillips

George Phillips

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Jun 17, 2015
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It's just because he says he is going to configure a Windows Server 2012 r2 on his network and use it to run an Active Directory, DNS and DHCP server. My first solution will enable him to run both DHCP services from the router and also the Windows Server simultaneously. If the DHCP pools are not separated, there will be issues. Idealy, we want to make it simply but have to tweak it to meet the requirements.
 
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DeadlyDays

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Mar 29, 2013
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I would agree with setting up the 2012 server to serve all devices with DHCP instead of splitting. It seems a better solution even if you spend a bit more time. if you are configuring the server in the first place to serve DHCP, you should probably learn how to configure it properly at the same time anyway.
 
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