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adding a new scope to allow more users and eliminate ip conflicts

Posted on 2010-11-24
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Last Modified: 2012-05-10
Hi
I setup a new windows 2008 server and created dhcp scope, I have two NIC one with ip 10.60.6.11 and second 10.60.6.12, the scope runs from 10.60.6.94 - 10.60.6.253
I want to add another scope and make sure it will allow users to connect to the internet, do I need to change the ip in NIC 2, example 10.60.7.11 and will the users be able to access the data on the 10.60.6.11 server?? whats the best practice..
lets say I have over 300 users the IPs below 10.60.6.94 is for printers and such...
Thx
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Question by:IbrahimKilani
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by:KenMcF
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The best way would be to configure a separate VLAN or setup a router to a different subnet and set the IP helper to point to the DHCP servers IP.

If you are going to setup the server with two NICs, one on each subnet you will need to configure RRAS so the computers can route out to the internet.

Is this server a Domain Controller?



http://technet.microsoft.com/en-us/library/cc754634(WS.10).aspx
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by:IbrahimKilani
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yes, The server is a domain controller, and we also have a VPN appliance that is the gateway 10.60.6.25, I just created a superscope and want to add a new scope under that, is that safe??
thx
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by:KenMcF
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Since it is a Domain Controller I would only use a single NIC. Having multiple NICs in a DC can cause issues with replication becuase of multpile DNS registrations and also problems with the computer browser.  
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by:IbrahimKilani
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Hi attached is a pic of what i did, will the new scope work??
DHCP.jpg
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KenMcF earned 125 total points
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It may work, but I do not sugest having two NICs or multiple IP address assigned to a Domain Contorller. You will run into issues. The best thing to do here is create a seperate VLAN or routed segment and set the IP-Helper to point to your DHCP server. ANother option would be to change your subnet mask from 255.255.255.0 to 255.255.0.0. But if you do this the mask will need changed on every network device.


http://articles.techrepublic.com.com/5100-10878_11-6131003.html
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by:IbrahimKilani
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I'M GOING TO WAIT COUPLE DAYS AND SEE IF MY setup works, how do I setup the Vlan , is it part of windows 2008 server?? I cant change subnet for now, too many PLcs rely on this network...
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by:KenMcF
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You would need to setup a VLAN on your switches.

The way you have it setup may work, but just be aware or some of the issues you may have with your domain controller.

http://social.technet.microsoft.com/Forums/en/winservergen/thread/e7bdacb7-1cae-4f28-9009-7df301971fca
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by:IbrahimKilani
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Got it, interesting, what make of switch do you recommend or better you already used,
Thx
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by:IbrahimKilani
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very good Advices
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by:KenMcF
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I have used Cisco and HP switches in the past.

Another option you may have is to put the DHCP service on another server that is not a Domain Contorller.

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by:IbrahimKilani
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I do have the previous server ,I disabled the DHCP, If i want  I want to re-enable it, what should I set the scope to knowing the previous setup mentioned previously...I do not want to use same scope as when I activate it them both at same time, users got conflict, ip already in use..????
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by:KenMcF
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I would migrate the database over so you do not get conflicts, also on the advanced tab of  the server you can set conflict detection so if the IP is in use it will not hand it out.


http://www.petri.co.il/dhcp-server-migration-made-easy-windows-server-2008.htm
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by:IbrahimKilani
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also on the advanced tab of  the server you can set conflict detection so if the IP is in use it will not hand it out.
do you have a print screen on how to do that??
or step by step??
Thx
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by:KenMcF
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by:IbrahimKilani
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Will do thx
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