Problem with some MACs

[Piotrek S.]

Hi,

I noticed "little" problem with some devices in my network.
They can't obtain IP address from DHCP (ISC 4.2.0).

So i decided to check logs ... and can't find entries contain the
physical adresses of these hosts.
I thought it was a problem with network connection but at the physical
layer everything was ok.

I tried to change the physical address:

d7:00:f4:ae:ef:c5 -> 00:00:f4:ae:ef:c5

and

87:3c:f1:8f:13:00 -> 00:3c:f1:8f:13:00

... and it helped:

Jan  4 10:52:32 rt-temp dhcpd: DHCPDISCOVER from 00:00:f4:ae:ef:c5 via
192.168.29.1
Jan  4 10:52:33 rt-temp dhcpd: DHCPOFFER on 192.168.29.249 to
00:00:f4:ae:ef:c5 (doooom) via 192.168.29.1
Jan  4 10:52:33 rt-temp dhcpd: DHCPREQUEST for 192.168.29.249
(192.168.252.1) from 00:00:f4:ae:ef:c5 (doooom) via 192.168.29.1
Jan  4 10:52:33 rt-temp dhcpd: DHCPACK on 192.168.29.249 to
00:00:f4:ae:ef:c5 (doooom) via 192.168.29.1

So I'm wondering... what this is happening?

Thanks for any help.

Regards