[Kea-users] IPV6 client gets the wrong IP for sometime after a reboot

[Francis Dupont]

Veronique Lefebure writes:
> And Francis, you confirm that this is a behaviour which is different between
>KEA (without flex-id) and ISC DHCP ?

=> the DUID as the unique identifier for a DHCPv6 client is in the standard
so Kea without flex-id just follows it. The flex-id allows to rewrite
the option the time to assign and store the lease. ISC DHCP has a similar
feature so it should be possible to get the wanted behaviour with it...

BTW the problem is in clients which MUST according to the standard use
a stable DUID. When stable storage is not available the solution is
to use a LL (vs LLT) DUID i.e. to encapsulate the mac address into the DUID
without (again vs LLT) adding a timestamp.

I know that the ISC DHCP client can do this as I added this command line
option many years ago in it...

Thanks

Francis Dupont <fdupont at isc.org>