[Kea-users] Lease lifetime

[Thomas Markwalder]

Hi:

These values can be used to set limits on lifetimes requested by 
clients.  This allows you to make sure client's do no request values 
that are too small or too large for your requirements.  If you do not 
set them, they default to valid-lifetime which effectively ignores 
requested client lifetimes.


On 9/4/20 8:49 AM, Marcos Renato da Silva Junior wrote:
>
> Thanks Thomas,
>
> But I still a bit confused about default to min-valid-lifetime and 
> max-valid-lifetime.
>
> Em 04/09/2020 09:03, Thomas Markwalder escreveu:
>> Hello:
>>
>> You need only set calculate-tee-times to true. The percentage values, 
>> t1-percent and t2-percent, default to .5 and .875 respectively.
>>
>>
>>
>> On 9/3/20 7:47 PM, Marcos Renato da Silva Junior wrote:
>>>
>>> Hi,
>>>
>>>
>>> 1 - "Beginning with Kea 1.6.0 the lease valid lifetime is extended 
>>> from a single value to a triplet with minimum, default and maximum 
>>> values using |min-valid-lifetime|, |valid-lifetime| and 
>>> |max-valid-lifetime|. When the client does not specify a lifetime 
>>> the default value is used, when it specifies using a DHCP option 
>>> code 51 this value is used if it is not less than the minimum (in 
>>> this case the minimum is returned) or greater than the maximum (in 
>>> this case the maximum is used)."
>>>
>>> What is the default value for |min-valid-lifetime| and 
>>> |max-valid-lifetime| ?
>>>
>>> I presume |valid-lifetime| right ?
>>>
>>>
>>> 2 - "According to RFC 2131 <https://tools.ietf.org/html/rfc2131>, 
>>> servers should send values for T1 and T2 that are 50% and 87.5% of 
>>> the lease lifetime, respectively. By default, kea-dhcp4 does not 
>>> send either value. It can be configured to send values that are 
>>> specified explicitly or that are calculated as percentages of the 
>>> lease time."
>>>
>>> So explicitly :
>>>
>>> # DHCPv4 configuration starts on the next line
>>> "Dhcp4":  {
>>>
>>> # First we set up global values
>>>      "valid-lifetime":  4000,
>>>      "renew-timer":  1000,
>>>      "rebind-timer":  2000,
>>>
>>> And calculated as percentages :
>>>
>>> # DHCPv4 configuration starts on the next line
>>> "Dhcp4":  {
>>>
>>> # First we set up global values
>>>      "valid-lifetime":  4000,
>>> |"calculate-tee-times": true, |
>>> Or :
>>>
>>> ||
>>> # DHCPv4 configuration starts on the next line
>>> "Dhcp4":  {
>>>
>>> # First we set up global values
>>>      "valid-lifetime":  4000,
>>> |"calculate-tee-times": true, |     ||"t1-percent": 0.5, "t2-percent": 0.875,||
>>>
>>>
>>> It's the right way?
>>>
>>>
>>> Best,
>>> ||||||
>>>
>>> -- 
>>> Marcos Renato da Silva Junior
>>>
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>>
>>
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> -- 
> Marcos Renato da Silva Junior
> Universidade Estadual Paulista - Unesp
> Faculdade de Engenharia de Ilha Solteira - FEIS
> Departamento de Engenharia Elétrica - DEE
> 15385-000 - Ilha Solteira/SP
> (18) 3743-1164
>
> _______________________________________________
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>
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