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Windows 2003 DHCP with Multiple scope for each VLAN. RRS feed

  • Question

  • Hi,
       Currently we have our DHCP running on Cisco Core Switch and I am planning to move it to Windows 2003 . I was testing but I cannot get through. It would great if someone can point out what is going wrong.

    Windows 2003 DHCP installed. (10.36.100.36)
    6 scope:
    10.36.100.0
    10.36.102.0
    10.36.103.0
    10.36.104.0
    10.36.105.0
    10.36.106.0.

    Cisco Catalyst 4948 with five vlan configure.
    Vlan 102
    Vlan 103
    Vlan 104
    Vlan 105
    Vlan 106

    I am using DHCP IP Helper so that users on Vlan 102 will get ip from scope 10.36.102.0
    But it's not working out for me.

    If i connect the client to a port which i a member of default vlan then it gets the ip from the scope 10.36.100.0

    But if i use port with vlan 102.. it not getting an ip from scope 10.36.102.0. Well it fails to get an ip.
    My DHCP ip helper has ip of the DHCP server 10.36.100.36. But that seems not to work.

    I assume we need a route in this case.. but i guess a 3rd layer swtich would work, right?
    Anyone can please tell me what should I do.?


    Thank you,

    Ruchir.

    Wednesday, June 2, 2010 1:12 AM

Answers

  • Hello,

    this question doesn't really belong to Windows, it is a configuration question of the CISCO switch and should be asked in the CISCO forums instead.

    https://supportforums.cisco.com/index.jspa


    Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights.
    • Proposed as answer by Ace Fekay [MCT] Thursday, June 3, 2010 3:50 AM
    • Marked as answer by Miles Zhang Thursday, June 3, 2010 9:03 AM
    Wednesday, June 2, 2010 10:11 PM

All replies

  • It is better if you keep your DHCP server in a different VLAN than default.

    I suggest you to create another VLAN 100 or put your DHCP server in any VLAN created by you and change the DHCP IP helper to new IP and give a try.

    Regards,

    Sunit

    Wednesday, June 2, 2010 7:11 AM
  • Hello,

    this question doesn't really belong to Windows, it is a configuration question of the CISCO switch and should be asked in the CISCO forums instead.

    https://supportforums.cisco.com/index.jspa


    Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights.
    • Proposed as answer by Ace Fekay [MCT] Thursday, June 3, 2010 3:50 AM
    • Marked as answer by Miles Zhang Thursday, June 3, 2010 9:03 AM
    Wednesday, June 2, 2010 10:11 PM
  • Meinolf is correct.  This is most likely a configuration issue on your Cisco device.  The Windows DHCP server can only assign from the correct scope based on the information that the DHCP RElay Agent (IP Helper) updates in the GIADDR field in the packet.

    The DHCP Relay Agent
    http://www.anitkb.com/2010/04/dhcp-relay-agent.html

     


    Visit: anITKB.com, an IT Knowledge Base.
    Wednesday, June 2, 2010 11:14 PM
  • I agree as well with Meinolf's asessment. It appears to be a Cisco Catalyst VLAN config requirement that's missing.

    Ace


    Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003 Microsoft Certified Trainer Microsoft MVP - Directory Services This posting is provided AS-IS with no warranties or guarantees and confers no rights.
    Thursday, June 3, 2010 3:52 AM
  • Hi Ruchir,

    Did you solve this issue?

    I have the same issue, and I'm notsure if the problem is cisco config because when I set DHCP  multiple scope in cisco L3 switch it works fine; when I set multiple scope in windows server it does not work, I have also set ip helper address option in L3 switch

    regards

    Monday, December 2, 2013 3:41 AM