[Kea-users] different lease times

[Jason Keltz]

Hi Darren,

Thanks for your help .. a few questions...


  1.
would it be valid syntax to also set lease-lifetime in the pool instead of using the class?

 "pools": [
                    {
                        "pool": "10.1.2.100-10.1.2.200",
                         "lease-lifetime": "300"
                    }
]

  1.
I already assign the pools to "client-class": "KNOWN" - can I specify multiple classes? "client-class": "KNOWN", "short-lease"?
  2.
If I use a class to do this, is the "valid-lifetime": 300 inside the subnet definition necesary? It is repeated in both the subnet and the client-class short-lease.

Jason.


________________________________
From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Darren Ankney <darren.ankney at gmail.com>
Sent: Tuesday, April 2, 2024 9:17 AM
To: Kea user's list <kea-users at lists.isc.org>
Subject: Re: [Kea-users] different lease times

Hi Jason,

Something like this should do:

{
    "Dhcp4": {
        "interfaces-config": {
            "interfaces": [
                "ens256"
            ]
        },
        "lease-database": {
            "type": "memfile",
            "persist": false
        },
        "calculate-tee-times": true,
        "option-data": [
            {
                "name": "domain-name-servers",
                "data": "10.0.0.1"
            }
        ],
        "client-classes": [
          {
            "name": "short-lease",
            "only-if-required": true,
            "valid-lifetime": 300
          }
        ],
        "valid-lifetime": 604800,
        "reservations": [
          {
            "hw-address": "00:00:00:11:11:11",
            "ip-address": "10.1.2.12"
          }
        ],
        "subnet4": [
            {
                "subnet": "10.1.2.0/24",
                "id": 1,
                "option-data": [
                    {
                        "name": "routers",
                        "data": "10.1.2.1"
                    }
                ],
                "valid-lifetime": 300,
                "pools": [
                    {
                        "pool": "10.1.2.100-10.1.2.200",
                        "require-client-classes": [ "short-lease" ]
                    }
                ]
            }
        ],
        "loggers": [
            {
                "name": "kea-dhcp4",
                "severity": "DEBUG",
                "debuglevel": 99,
                "output_options": [
                    {
                        "output": "stdout"
                    }
                ]
            }
        ]
    }
}

Thank you,
Darren Ankney

On Mon, Apr 1, 2024 at 3:05 PM Jason Keltz <jas at yorku.ca> wrote:
>
> Hi..
>
> At the top of my KEA configuration file, I specify "valid-lifetime" for
> leases.  Most of my hosts have a static IP which is allocated via Kea.
> Those leases can be quite lengthy. On the other hand, each subnet has a
> dynamic pool as well.  How can I define a much lower lease time for the
> hosts that are being allocated dynamic IP?
>
> Would this be an option in "reservations"?  Can I avoid duplicating for
> every host?
>
> reservations": [
>      {
>          "hw-address": "ab:cd:ef:gh:ij:kl",
>          "hostname": "myhost",
>          "option-data": [
>              {
>                  "name": "log-servers",
>                  "data": "w.x.y.z"
>              },
>              {
>                  "name": "domain-name-servers",
>                  "data": "a.b.c.d,e.f.g.h"
>              },
>              {
>                  "name": "domain-name",
>                  "data": "mydomain.com"
>              }
>          ]
>      },
> ...
>
> ]
>
> Jason.
>
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