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// This is an example configuration file for DHCPv6 server in Kea.
// It demonstrates an advanced feature called shared network. Typically, for
// each physical link there is one IPv6 subnet that the server is expected
// to manage. However, in some cases there is a need to configure more subnets
// in the same physical location. This may sound odd, as IPv6 is not expected
// to run out of addresses. However, due to vast address space some deployments
// experiment with various addressing schemes and later find out that the
// initial proposal was not best and way to migrate to something else.
{
"Dhcp6": {
// Kea is told to listen on eth0 interface only.
"interfaces-config": {
"interfaces": [ "eth0" ]
},
// You also need to tell where to store lease information.
// memfile is the backend that is easiest to set up.
"lease-database": {
"type": "memfile",
"lfc-interval": 3600
},
// It is likely that in your network you'll have a mix of regular,
// "plain" subnets and shared networks. It is perfectly valid to mix
// them in the same config file.
//
// This is regular subnet. It's not part of any shared-network.
"subnet6": [
{
"pools": [ { "pool": "2001:db8:2::/80" } ],
"subnet": "2001:db8:2::/64",
"interface": "eth0"
}
],
// Hhe shared networks definition starts here. shared-networks can
// contain a list of shared networks. There are many parameters
// that can be specified here, so this example may be overwhelming
// at first, but the only mandatory parameter for each shared
// network is name. It must be unique. Typically, each shared
// network also needs to have at least two subnets to be functional,
// but if you really want to, you can define a degraded shared
// network that has 1 or even 0 subnets. This may come in handy
// when migrating between regular subnets and shared networks
// or when debugging a problem. It is not recommended to use
// 1 subnet per shared network, as there is extra processing
// overhead for shared networks.
"shared-networks": [
{
"interface": "eth1",
// Similar to regular subnets, it is forbidden to define both
// interface and interface-id at the same time. That's because
// interface parameter expresses physical network interface
// for links available locally and interface-id identifies
// values inserted by relays, which are only used for
// remote traffic. A shared network cannot be both direct
// and relayed.
//"interface-id": "content of the option",
// Other parameters defined here will be inherited by the
// subnets.
"name": "frog",
"option-data": [ ],
"preferred-lifetime": 200,
"rapid-commit": true,
"rebind-timer": 150,
"relay": {
"ip-address": "2001:db8::1"
},
"renew-timer": 100,
// "reservation-mode": "all",
// It is replaced by the "reservations-global",
// "reservations-in-subnet" and "reservations-out-of-pool"
// parameters.
// Specify if server should lookup global reservations.
"reservations-global": false,
// Specify if server should lookup in-subnet reservations.
"reservations-in-subnet": true,
// Specify if server can assume that all reserved addresses
// are out-of-pool.
// Ignored when reservations-in-subnet is false.
// If specified, it is inherited by "subnet6" levels.
"reservations-out-of-pool": false,
// List of subnets belonging to this particular shared-network
// start here.
"subnet6": [
// This is the first subnet.
{
"preferred-lifetime": 30,
"rapid-commit": false,
"rebind-timer": 20,
// It is possible to override some values here.
"relay": {
"ip-address": "2001:db8:1::123"
},
"renew-timer": 10,
// "reservation-mode": "all",
// It is replaced by the "reservations-global",
// "reservations-in-subnet" and "reservations-out-of-pool"
// parameters.
// Specify if server should lookup global reservations.
"reservations-global": false,
// Specify if server should lookup in-subnet reservations.
"reservations-in-subnet": true,
// Specify if server can assume that all reserved addresses
// are out-of-pool.
// Ignored when reservations-in-subnet is false.
"reservations-out-of-pool": false,
"subnet": "2001:db8:1::/64",
"pools": [ { "pool": "2001:db8:1:0:abcd::/80" } ],
"valid-lifetime": 40
},
// This is the second subnet.
{
"preferred-lifetime": 30,
"pools": [ { "pool": "3000:db8::/64" } ],
"rapid-commit": false,
"rebind-timer": 20,
"relay": {
"ip-address": "3000::1"
},
"renew-timer": 10,
// "reservation-mode": "all",
// It is replaced by the "reservations-global",
// "reservations-in-subnet" and "reservations-out-of-pool"
// parameters.
// Specify if server should lookup global reservations.
"reservations-global": false,
// Specify if server should lookup in-subnet reservations.
"reservations-in-subnet": true,
// Specify if server can assume that all reserved addresses
// are out-of-pool.
// Ignored when reservations-in-subnet is false.
"reservations-out-of-pool": false,
"subnet": "3000::/16",
"valid-lifetime": 40
}
],
"valid-lifetime": 300
} ]
}
}
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