[Kea-users] Specifying lease times at reservation or pool level

Sun Oct 13 17:29:06 UTC 2019

I do not believe it is possible directly but it should be indirectly using
different subnets (with per subnet different lifetimes) in a shared
network. Note you can also guard a pool (but not a subnet) using the
UNKNOWN client class.

Regards

Francis Dupont <fdupont at isc.org>
Gibbins, John (IM&T, Black Mountain) writes:
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> I am trying to configure a kea server as a pilot to replace an our ISC dhcp=
> d servers.
>
> We currently specify different default lease times for reservations than we=
>  do for pools, using much smaller lifetimes for pools.  We specify a defaul=
> t-lease-time for the subnet (or inherit a global value) to cover the reserv=
> ations and override this for the pools within the subnets.  We do not inclu=
> de reservations within pools (in kea terms: "reservation-mode": "out-of-poo=
> l").
>
> I gather from lists that this is not yet possible:
> (https://lists.isc.org/mailman/htdig/kea-users/2017-March/000898.html, http=
> ://kea-users.7364.n8.nabble.com/Kea-users-lease-time-td384.html)
>
> Are there any plans to implement this?  This could be a show stopper for ou=
> r migration to kea, unless I can find a workaround.
>
> Background:  We current run a dozen servers spread around the country with =
> most hosts obtaining their address via a reservation with a long lease time=
> , but visitors from a different site are given a short lease address from a=
>  pool which is restricted to a list of known machines via over 20,000 subcl=
> ass definitions.  We run dual-stack across the organisation so want to do t=
> his for both IPv4 and IPv6 pools.
>
> Regards
> johng
>
>
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> <p class=3D"MsoNormal">I am trying to configure a kea server as a pilot to =
> replace an our ISC dhcpd servers.<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
> <p class=3D"MsoNormal">We currently specify different default lease times f=
> or reservations than we do for pools, using much smaller lifetimes for pool=
> s.  We specify a default-lease-time for the subnet (or inherit a globa=
> l value) to cover the reservations and
>  override this for the pools within the subnets.  We do not include re=
> servations within pools (in kea terms: "reservation-mode": "=
> out-of-pool").<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
> <p class=3D"MsoNormal">I gather from lists that this is not yet possible:<o=
> :p></o:p></p>
> <p class=3D"MsoNormal">(<a href=3D"https://lists.isc.org/mailman/htdig/kea-=
> users/2017-March/000898.html">https://lists.isc.org/mailman/htdig/kea-users=
> /2017-March/000898.html</a>,
> <a href=3D"http://kea-users.7364.n8.nabble.com/Kea-users-lease-time-td384.h=
> tml">http://kea-users.7364.n8.nabble.com/Kea-users-lease-time-td384.html</a=
> >)<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
> <p class=3D"MsoNormal">Are there any plans to implement this?  This co=
> uld be a show stopper for our migration to kea, unless I can find a workaro=
> und.<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
> <p class=3D"MsoNormal">Background:  We current run a dozen servers spr=
> ead around the country with most hosts obtaining their address via a reserv=
> ation with a long lease time, but visitors from a different site are given =
> a short lease address from a pool which
>  is restricted to a list of known machines via over 20,000 subclass definit=
> ions.  We run dual-stack across the organisation so want to do this fo=
> r both IPv4 and IPv6 pools.<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
> <p class=3D"MsoNormal">Regards<o:p></o:p></p>
> <p class=3D"MsoNormal">johng<o:p></o:p></p>
> <p class=3D"MsoNormal"><o:p> </o:p></p>
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>
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