vrrp_instance pihole {
  state BACKUP
  interface ens18

  unicast_src_ip 192.168.100.22
  unicast_peer {
    192.168.3.21
  }

  virtual_router_id 1 
  priority 9 
  advert_int 1

  authentication {
    auth_type PASS
    auth_pass dns12345
  }

  virtual_ipaddress {
    192.168.100.23/24
  }
}