arp: unknown hardware address

[Volker]

Hi!

This morning, I found this in the daily periodic mail from a RELENG_7
machine:

+arp: unknown hardware address format (0x0000)
+arp: unknown hardware address format (0x0000)
+arp: unknown hardware address format (0x0000)
+arp: unknown hardware address format (0x0000)
+arp: unknown hardware address format (0x0000)

I checked my yesterdays' logs and found:

Feb 21 20:56:39 bellona dhcpd: DHCPREQUEST for 192.168.178.20 from
00:18:de:a4:b
8:6a via aue0: wrong network.
Feb 21 20:56:39 bellona dhcpd: DHCPNAK on 192.168.178.20 to
00:18:de:a4:b8:6a vi
a aue0
Feb 21 20:56:40 bellona kernel: arp: unknown hardware address format
(0x0000)
Feb 21 20:56:40 bellona kernel: Feb 21 20:56:40 bellona kernel: arp:
unknown hardware address format (0x0000)
Feb 21 20:56:42 bellona kernel: arp: unknown hardware address format
(0x0000)
Feb 21 20:56:47 bellona last message repeated 3 times
Feb 21 20:56:51 bellona dhcpd: DHCPDISCOVER from 00:18:de:a4:b8:6a via aue0
Feb 21 20:56:51 bellona kernel: Feb 21 20:56:51 bellona dhcpd:
icmp_echorequest 192.168.20.249: Operation not permitted
Feb 21 20:56:52 bellona dhcpd: DHCPOFFER on 192.168.20.249 to
00:18:de:a4:b8:6a (lp4) via aue0


7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #8: Sun Feb 17 19:13:08 CET 2008

The network the dhcp client was requesting (192.168.178.20) is not mine,
dhcpd rejected that address and offered another one. But why does
FreeBSD complain about the bad hardware address?

Any explanations?

Volker