// This is an example configuration file for the DHCPv6 server in Kea.
// It contains configuration of the PostgreSQL host database backend, used
// to retrieve reserved addresses, host names, DHCPv4 message fields
// and DHCP options from PostgreSQL database.
{ "Dhcp6":

{
// Kea is told to listen on eth0 interface only.
  "interfaces-config": {
    "interfaces": [ "eth0" ]
  },

// We need to specify the database used to store leases. As of
// June 2022, three database backends are supported: MySQL,
// PostgreSQL and the in-memory database, Memfile.
// We'll use memfile because it doesn't require any prior set up.
  "lease-database": {
    "type": "memfile"
  },

// This is pretty basic stuff, it has nothing to do with reservations.
  "preferred-lifetime": 3000,
  "valid-lifetime": 4000,
  "renew-timer": 1000,
  "rebind-timer": 2000,

// Kea supports two types of identifiers in DHCPv6: hw-address
// (hardware/MAC address of the client) and duid (DUID inserted by the
// client). When told to do so, Kea can check for each of these
// identifier types, but it takes a costly database lookup to do so. It
// is therefore useful from a performance perspective to use only the
// reservation types that are actually used in a given network.
    "host-reservation-identifiers": [ "duid", "hw-address" ],

// Specify connection to the database holding host reservations. The type
// specifies that the PostgreSQL database is used. user and password are the
// credentials used to connect to the database. host and name specify
// location of the host where the database instance is running, and the
// name of the database to use. The server processing a packet will first
// check if there are any reservations specified for this client in the
// reservations list, within the subnet (configuration file). If there are
// no reservations there, the server will try to retrieve reservations
// from this database.
// The database specification can go into one hosts-database entry for
// backward compatibility or be listed in hosts-databases list.
  "hosts-databases": [
    {
       "type": "postgresql",
       "reconnect-wait-time": 3000, // expressed in ms
       "max-reconnect-tries": 3,
       "name": "keatest",
       "user": "keatest",
       "password": "keatest",
       "host": "localhost"
    }
  ],

// Define a subnet with a pool of dynamic addresses and a pool of dynamic
// prefixes. Addresses and prefixes from those pools will be assigned to
// clients which don't have reservations in the database. Subnet identifier
// is equal to 1. If this subnet is selected for the client, this subnet
// id will be used to search for the reservations within the database.
  "subnet6": [
    {
      "subnet": "2001:db8:1::/48",

      "pools": [ { "pool": "2001:db8:1::/80" } ],

      "pd-pools": [
          {
              "prefix": "2001:db8:1:8000::",
              "prefix-len": 56,
              "delegated-len": 64
          }
      ],
      "interface": "eth0",
      "id": 1
    }
  ],

// The following configures logging. It assumes that messages with at
// least informational level (info, warn, error and fatal) should be
// logged to stdout.
    "loggers": [
        {
            "name": "kea-dhcp6",
            "output-options": [
                {
                    "output": "stdout"
                }
            ],
            "debuglevel": 0,
            "severity": "INFO"
        }
    ]
}

}