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// This is an example configuration file for DHCPv6 server in Kea.
// It provides parameters controlling processing of expired leases,
// a.k.a. leases reclamation.
{ "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.
// Note, we're setting the maximum number of row read errors to 100,
// (defaults to 0, meaning unlimited).
"lease-database": {
"type": "memfile",
"lfc-interval": 3600,
"max-row-errors": 100
},
// The following parameters control processing expired leases. Expired leases
// will be reclaimed periodically according to the "reclaim-timer-wait-time"
// parameter. Reclaimed leases will be held in the database for 1800s to
// facilitate lease affinity. After this period the leases will be removed.
// The frequency of removal is controlled by the
// "flush-reclaimed-timer-wait-time" parameter. The lease reclamation
// routine will process at most 500 leases or will last for at most
// 100ms, during a single run. If there are still some unreclaimed
// leases after 10 attempts, a warning message is issued.
// If both "flush-reclaimed-timer-wait-time" and "hold-reclaimed-time" are not
// 0, when the client sends a release message the lease is expired instead of
// being deleted from lease storage.
"expired-leases-processing": {
"reclaim-timer-wait-time": 5,
"hold-reclaimed-time": 1800,
"flush-reclaimed-timer-wait-time": 10,
"max-reclaim-leases": 500,
"max-reclaim-time": 100,
"unwarned-reclaim-cycles": 10
},
// 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": [
{
"id": 1,
"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 and fatal) should be
// logged to stdout.
"loggers": [
{
"name": "kea-dhcp6",
"output-options": [
{
"output": "stdout"
}
],
"debuglevel": 0,
"severity": "INFO"
}
]
}
}
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