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  • Automatic DHCP switching when active DHCP server goes down

    We are looking into how we can provide DHCP redundancy in particular using an automatic switching method. At the moment, we have one server acting as a DHCP server and another as a backup DHCP server, with a copy of the DHCP scope. The problem with this method is that we have to manually reconfigure the IP Helper on the switches and manually activate the backup DHCP scopes when the main DHCP server goes down but we want to automate this process.

    Is there a method we can employ to do this?
    |
    +-- JDMils
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    +-- Regional Systems Engineer, DotNet programmer & Jack of all trades
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  • #2
    Re: Automatic DHCP switching when active DHCP server goes down

    split scopes is the only real way to provide dhcp redundancy.. it's not something that lends itself

    although, on your spare server - just add the correct IP to the interface when the main line goes down
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    • #3
      Re: Automatic DHCP switching when active DHCP server goes down

      If you have Server 2012 you have DHCP failover as an option (http://technet.microsoft.com/en-us/l.../dn338978.aspx)

      Basically multiple DHCP server get the same scope (automatically copied from one to the other) and manage issuing addresses between them
      Far superior to split scopes
      Tom Jones
      MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
      PhD, MSc, FIAP, MIITT
      IT Trainer / Consultant
      Ossian Ltd
      Scotland

      ** Remember to give credit where credit is due and leave reputation points where appropriate **

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      • #4
        Re: Automatic DHCP switching when active DHCP server goes down

        Originally posted by Ossian View Post
        If you have Server 2012 you have DHCP failover as an option (http://technet.microsoft.com/en-us/l.../dn338978.aspx)

        Basically multiple DHCP server get the same scope (automatically copied from one to the other) and manage issuing addresses between them
        Far superior to split scopes
        ooh, cool, thanks !
        but i'm assuming it only shares with 2k12, not with anything else ?
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        • #5
          Re: Automatic DHCP switching when active DHCP server goes down

          Yes, all the DHCP servers need to be 2012 and above, although it works with any DHCP client
          Tom Jones
          MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
          PhD, MSc, FIAP, MIITT
          IT Trainer / Consultant
          Ossian Ltd
          Scotland

          ** Remember to give credit where credit is due and leave reputation points where appropriate **

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