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Create DHCP Scopes for VLANs RRS feed

  • Question

  • 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

    Friday, May 9, 2014 1:31 PM

Answers

  • 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
    MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
    Microsoft Certified Trainer
    Microsoft MVP - Directory Services
    Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php

    This posting is provided AS-IS with no warranties or guarantees and confers no rights.

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    • Proposed as answer by Alex Lv Thursday, May 15, 2014 1:37 AM
    • Marked as answer by Shane W Thursday, May 15, 2014 9:10 AM
    Wednesday, May 14, 2014 8:34 PM

All replies

  • 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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    • Edited by cguan Monday, May 12, 2014 6:57 AM Edit
    • Proposed as answer by Alex Lv Thursday, May 15, 2014 1:37 AM
    Monday, May 12, 2014 6:53 AM
    • Proposed as answer by Alex Lv Thursday, May 15, 2014 1:37 AM
    Monday, May 12, 2014 7:20 AM
  • 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
    MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
    Microsoft Certified Trainer
    Microsoft MVP - Directory Services
    Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php

    This posting is provided AS-IS with no warranties or guarantees and confers no rights.

    FaceBook Twitter LinkedIn

    • Proposed as answer by Alex Lv Thursday, May 15, 2014 1:37 AM
    • Marked as answer by Shane W Thursday, May 15, 2014 9:10 AM
    Wednesday, May 14, 2014 8:34 PM