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High Availability DHCP services

dhcpd.conf 10.10.0.10
# Global Options
option domain-name "example.com";
option domain-name-servers 10.10.0.10,10.10.0.11;
option tftp-server-name "10.10.0.10";
option time-servers 10.10.0.10,10.10.0.11;
option ntp-servers 10.10.0.10,10.10.0.11;
option time-offset -25200;
default-lease-time 86400;
ddns-update-style interim;
max-lease-time 86400;
authoritative;
ddns-update-style  none;
option sip-servers-name code 120 = text;

failover peer "dhcp" {
  primary;
  address 10.10.0.10;
  port 520;
  peer address 10.10.0.11;
  peer port 521;
  max-response-delay 60;
  max-unacked-updates 10;
  mclt 600;
  split 128;
  load balance max seconds 3;
}
include "/etc/dhcpd.master";
dhcpd.master 10.10.0.10
# Global Options
option domain-name "example.com";
option domain-name-servers 10.10.0.10,10.10.0.11;
option tftp-server-name "10.10.0.10";
option time-servers 10.10.0.10,10.10.0.11;
option ntp-servers 10.10.0.10,10.10.0.11;
option time-offset -25200;
default-lease-time 86400;
ddns-update-style interim;
max-lease-time 86400;
authoritative;
ddns-update-style  none;
option sip-servers-name code 120 = text;

subnet 10.10.0.10 netmask 255.255.255.0 {

}


# eth1 - SALES
#
subnet 10.10.1.0 netmask 255.255.255.0 {
  pool {
   failover peer "dhcp";
   range                     10.10.1.2  10.10.1.254;
   deny dynamic bootp clients;
   default-lease-time           43200;
   max-lease-time               43200;
   option routers               10.10.1.1;
   option subnet-mask           255.255.255.0;
   option domain-name           "example.com";
   option tftp-server-name      "10.10.1.10";
   option sip-servers-name      "sipx1.example.com:12000/cmcprov/login";
   option domain-name-servers   10.10.0.10;
   option ntp-servers           10.10.0.10;
        group {
        next-server sipx1.example.com;                # TFTP serve
                host information_systems_fxs_1 {
                        hardware ethernet 00:00:00:00:00:00;
                        fixed-address 10.10.1.16;
                }
        }
  }
}
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