failover peer "dhcp-failover" {
{% if inventory_hostname == dhcp_failover.primary_host %}
                primary;

                # MCLT = Maximum Client Lead Time.
                # Must be specified on the primary, forbidden on the secondary.
                mclt 3600;

                # Address or DNS name on which this node listens for connections
                # from its failover peer.
                address {{ dhcp_failover.primary_host }};
                peer address {{ dhcp_failover.secondary_host }};

                # Load balancing.
                split 128;
{% endif %}
{% if inventory_hostname == dhcp_failover.secondary_host %}
                secondary;
                # Address and peer address are reversed on the secondary node.
                address {{ dhcp_failover.secondary_host }};
                peer address {{ dhcp_failover.primary_host }};
{% endif %}

                # The following options can be shared between primary and
                # secondary failover peers.
                port 647;
                peer port 647;
                max-response-delay 30;
                max-unacked-updates 10;
                load balance max seconds 3;
}