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Create DHCP Scopes for VLANs

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Friday, May 9, 2014 1:31 PM

Hi

I have a Server 2008 R2 DHCP server with one scope for our 10.165.x.x range. We are going to introduce some VLANs on a 172.16.x.x range and want to create a DHCP scope for this on the same DHCP server as the 10.165.x.x range. If I create the scope now before configuring the VLANs, will computers in the 10.165 range get a 172.16 address?

Thanks in advance

Shane

All replies (3)

Wednesday, May 14, 2014 8:34 PM âś…Answered

Hi

I have a Server 2008 R2 DHCP server with one scope for our 10.165.x.x range. We are going to introduce some VLANs on a 172.16.x.x range and want to create a DHCP scope for this on the same DHCP server as the 10.165.x.x range. If I create the scope now before configuring the VLANs, will computers in the 10.165 range get a 172.16 address?

Thanks in advance

Shane

If you create a scope that has a different subnet than the interface on the DHCP server that's connected to the network, then no, it will not affect the current clients on the subnet.

To make it work for your VLAN, in the switch, you must create a DHCP Relay Agent or IP Helper. That's what makes it work to the VLAN subnet. To create the Relay Agent/IP Helper, consult your switch documentation.

Ace Fekay
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Monday, May 12, 2014 6:53 AM

check out this thread, it should give you an idea.

you need to have a dhcp relay agent if your are using multiple subnets in a single DHCP server.

http://social.technet.microsoft.com/Forums/windowsserver/en-US/dd5b5e8b-9730-443b-9e44-49c8419a5f5d/multiple-vlans-and-microsoft-dhcp-server-with-multiple-scopes?forum=winserverNIS

 

check out this link also: Multi homed DHCP Server

http://technet.microsoft.com/en-us/library/cc728205(v=ws.10).aspx

 

Bind a scope to a particular NIC

http://social.technet.microsoft.com/Forums/windowsserver/en-US/c443e03c-2b96-4585-976e-1443aaae5726/how-do-i-enable-one-server-to-assign-2-diffirent-dhcp-scopes-for-2-seperate-nics?forum=winserversecurity

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Monday, May 12, 2014 7:20 AM

Hi,

The DHCP server will assign the new scope address to the new VLAN client, of course, you must set your switch first.

The similar thread:

DHCP Super Scope Question

http://social.technet.microsoft.com/Forums/windowsserver/en-US/059a7bc6-6345-4d3b-83fc-cc1670d12c76/dhcp-super-scope-question

Hope this helps.

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