Automatic DHCP switching when active DHCP server goes down

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This topic contains 4 replies, has 3 voices, and was last updated by tehcamel tehcamel 5 years ago.

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    JDMils
    Member
    #164541

    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?

    tehcamel
    tehcamel
    Moderator
    #359915

    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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    Ossian
    Moderator
    #190069

    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/library/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

    tehcamel
    tehcamel
    Moderator
    #359918

    Re: Automatic DHCP switching when active DHCP server goes down

    Ossian;288028 wrote:
    If you have Server 2012 you have DHCP failover as an option (http://technet.microsoft.com/en-us/library/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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    Ossian
    Moderator
    #190081

    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

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