kea/doc/examples/kea4/with-ddns.json

// This is an example configuration file for the DHCPv4 server in Kea.
// It is a basic scenario with one IPv4 subnet configured but with DDNS
// enabled. 

{ "Dhcp4":

{
// Kea is told to listen on ethX interface only.
  "interfaces-config": {
    "interfaces": [ "ethX" ]
  },

// We need to specify the the database used to store leases. As of
// September 2016, four database backends are supported: MySQL,
// PostgreSQL, Cassandra, and the in-memory database, Memfile.
// We'll use memfile  because it doesn't require any prior set up.
  "lease-database": {
      "type": "memfile",
      "lfc-interval": 3600
  },

// Addresses will be assigned with a lifetime of 4000 seconds.
  "valid-lifetime": 4000,

// Renew and rebind timers are commented out. This implies that options
// 58 and 59 will not be sent to the client. In this case it is up to
// the client to pick the timer values according to RFC2131. Uncomment the
// timers to send these options to the client.
//  "renew-timer": 1000,
//  "rebind-timer": 2000,

// The following list defines subnets. We have only one subnet
// here. We tell Kea that it is directly available over local interface.
  "subnet4": [
    {
       "pools": [ { "pool":  "192.0.2.1 - 192.0.2.200" } ],
       "subnet": "192.0.2.0/24",
       "interface": "ethX"
    }
  ],

// Enable dynamic DNS updates
  "dhcp-ddns" : {
        "enable-updates" : true,
        "server-ip" : "192.0.2.0",
        "server-port" : 3432,
        "sender-ip" : "192.0.2.1",
        "sender-port" : 3433,
        "max-queue-size" : 2048,
        "ncr-protocol" : "UDP",
        "ncr-format" : "JSON",
        "always-include-fqdn" : true,
        "override-no-update" : true,
        "override-client-update" : true,
        "replace-client-name" : "when-present",
        "generated-prefix" : "test.prefix",
        "qualifying-suffix" : "test.suffix."
    }
},

// The following configures logging. It assumes that messages with at
// least informational level (info, warn, error and fatal) should be
// logged to stdout.
"Logging": {
    "loggers": [
        {
            "name": "kea-dhcp4",
            "output_options": [
                {
                    "output": "stdout"
                }
            ],
            "severity": "INFO"
        }
    ]
}

}