dhcpd.conf

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp-server/dhcpd.conf.example
#   see dhcpd.conf(5) man page
#

# Set DNS name and DNS server's IP address or hostname
option domain-name            "domain-name.example.com";
option domain-name-servers    172.22.24.21, 172.22.24.22;

omapi-port 7911;
omapi-key omapi_key;

key omapi_key {
     algorithm hmac-md5;
     secret ...;
}

boot-unknown-clients off;
ignore client-updates;
ddns-update-style none;
ddns-updates off;


# Declare DHCP Server
not authoritative;

# The default DHCP lease time
default-lease-time 43200;

# Set the maximum lease time
max-lease-time 86400;

allow booting;
allow bootp;

option fqdn.no-client-update    on;  # set the "O" and "S" flag bits
option fqdn.rcode2              255;
option pxegrub code 150 = text ;

include "/etc/dhcp/dhcpd.hosts";

failover peer "failover-peet" {
  primary;
  address 172.22.24.100;
  port 647;
  peer address 172.22.24.101;
  peer port 847;
  max-response-delay 60;
  max-unacked-updates 10;
  mclt 3600;
  # Nur Failover
  split 255;
  # Failover und Loadbalancing
  #split 128;
  load balance max seconds 3;
}

include "/media/dhcpconfig/dhcpd_replicated.conf";

dhcpd_replicated.conf

# subnet definition
subnet 172.22.24.0 netmask 255.255.255.0 {
    pool {
        # Range of IP addresses to allocate
        range 172.22.24.240 172.22.24.250;
        failover peer "failover-peer";
    }
    # Provide broadcast address
    option broadcast-address 172.22.24.255;
    # Set default gateway
    option routers 172.22.24.1;
    option dhcp-server-identifier 172.22.24.100;
}

host dhcp03-ens224 {
        hardware ethernet 00:00:00:00:00:00;
        fixed-address 172.22.24.100;
}
host dhcp04-ens224 {
        hardware ethernet 00:00:00:00:00:00;
        fixed-address 172.22.24.101;
}

log-facility local7;

# required for UEFI HTTP boot
if substring(option vendor-class-identifier, 0, 10) = "HTTPClient" {
  option vendor-class-identifier "HTTPClient";
}
# promote vendor in dhcpd.leases
set vendor-string = option vendor-class-identifier;
# next server and filename options
next-server 172.22.24.89;  # point to the foreman server to use the built-in tftp server to boot using pxe
option architecture code 93 = unsigned integer 16 ;
if option architecture = 00:06 {
    filename "grub2/bootia32.efi";
} elsif option architecture = 00:07 {
    filename "grub2/bootx64.efi";
} elsif option architecture = 00:09 {
    filename "grub2/bootx64.efi";
} else {
    filename "pxelinux.0";
}