[Kea-users] Possible bug with Kea DHCP Server?

[Darren Ankney]

Hi Chib,

Have a look at the log messages prior to the reboot.  Make sure that
the the  '[hwtype=1 xx:xx:xx:xx:xx:xx]' and
'cid=[01:xx:xx:xx:xx:xx:xx]' match precisely.  If they don't, then Kea
will see this as a different client and will not find the lease.

Thank you,

Darren Ankney

On Sun, Sep 10, 2023 at 9:44 PM Stephen Dennis (Gmail)
<skeetabomb at gmail.com> wrote:
>
> Hi,
>
> After a client received a lease, the client was rebooting.
> It tried to ask for the same IP (Windows machine), but Kea refused with this error, despite the fact that Kea has a reservation for that client's MAC:
> "2023-09-10 22:38:00.308 WARN  [kea-dhcp4.alloc-engine/2752.140528795599552] ALLOC_ENGINE_V4_DISCOVER_ADDRESS_CONFLICT [hwtype=1 xx:xx:xx:xx:xx:xx], cid=[01:xx:xx:xx:xx:xx:xx], tid=0xb4da0bab: conflicting reservation for address 192.168.1.11 with existing lease Address:       192.168.1.11"
>
> 1. Why would Kea not just answer the client with the same IP already assigned to that client?
> 2. Is there no mechanism in place to deal with the case where a client reboots and has to resend a DHCPREQUEST during an existing lease for that client?
>
> This, to me, looks like a bug.
>
> Thanks,
> Chib
>
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