// This is an example configuration file for DHCPv6 server in Kea.
// It demonstrates how to configure Kea to use DUID-LLT with some
// values specified explicitly.

{ "Dhcp6":

{

// Configure server identifier (DUID-LLT). The hexadecimal value of the
// identifier will be used as link layer address component of the DUID.
// The link layer type will be ethernet. The value of time is set to 0
// which indicates that the server must generate this value, i.e. use
// current time. Note that it is easy to move from this configuration
// to DUID-EN or DUID-LL. It would require changing the "type" value
// to "EN" or "LL" respectively. The "identifier" would hold a
// DUID-EN variable length identifier or DUID-LL link layer address.
// The values of "time" and "htype" would be ignored for DUID-EN.
// If one wanted to use a non-default enterprise-id for DUID-EN, the
// "enterprise-id" parameter would need to be added. Note that only
// a "type" parameter is mandatory while specifying "server-id" map.
  "server-id": {
    "type": "LLT",
    "identifier": "12C4D5AF870C",
    "time": 0,
    "htype": 1
  },

// 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",
      "lfc-interval": 3600
  },

// Addresses will be assigned with preferred and valid lifetimes
// being 3000 and 4000, respectively. Client is told to start
// renewing after 1000 seconds. If the server does not respond
// after 2000 seconds since the lease was granted, client is supposed
// to start REBIND procedure (emergency renewal that allows switching
// to a different server).
  "preferred-lifetime": 3000,
  "valid-lifetime": 4000,
  "renew-timer": 1000,
  "rebind-timer": 2000,

// The following list defines subnets. Each subnet consists of at
// least subnet and pool entries.
  "subnet6": [
    {
      "pools": [ { "pool": "2001:db8:1::/80" } ],
      "subnet": "2001:db8:1::/64",
      "interface": "eth0"
    }
  ],

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

}