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DHCP Failover

On the DHCP Failover dialog box, configure the following settings to apply to your DHCP failover servers.

NOTE: The DHCP Failover dialog box is accessed by clicking the Failover Settings link on the DHCP Server Defaults tab.

  1. Select the DHCP Failover check box to enable the DHCP Failover feature.

  2. Select whether you are configuring the failover settings for either the Primary or Secondary server.

  3. Configure the remaining settings in the table below.

    DHCP Failover Fields

    FieldDescription
    My IPIP address of the LAN interface.
    My PortPort number of the LAN interface.
    Peer IPIP address of the DHCP peer.
    Peer PortPort number of the DCHP peer.
    MLCTOptional. If selected, the default is 60 minutes. This field cannot be zero.
    SPLITOptional. If selected, determines which peer (primary/secondary) should process the DHCP requests.
    Max Response DelayOptional. If selected, determines how many seconds the DHCP server can pass without receiving a message from its failover peer before it assumes the connection has failed.
    Max Unacked UpdatesTells the remote DHCP server how many BNDUPD messages it can send before it receives a BNDACK from the local system.
    Load Balance Max SecondsOptional. Allows you to configure a cutoff after which load balancing is disabled. The cutoff is based on the number of seconds since the client sent its first DHCPDISCOVER or DHCPREQUEST message. It only works with clients that correctly implement the secs field.

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