dhclient fails: DHCPNACK rejected

[Yuri]

My dhclient session looks like this:

# dhclient re0
DHCPREQUEST on re0 to 255.255.255.255 port 67
DHCPNACK from 192.168.0.1 rejected.
DHCPREQUEST on re0 to 255.255.255.255 port 67
DHCPNACK from 192.168.0.1 rejected.
DHCPDISCOVER on re0 to 255.255.255.255 port 67 interval 8
DHCPOFFER from 192.168.0.1 rejected.
DHCPDISCOVER on re0 to 255.255.255.255 port 67 interval 17
DHCPOFFER from 192.168.0.1 rejected.
DHCPDISCOVER on re0 to 255.255.255.255 port 67 interval 18
DHCPOFFER from 192.168.0.1 rejected.
DHCPDISCOVER on re0 to 255.255.255.255 port 67 interval 9
DHCPOFFER from 192.168.0.1 rejected.

No static lease files present: /var/db/dhclient.leases.*.
dhcpcd has no problem setting up re0 on thisn host.
This happens on the router DLink DIR-601 with the latest firmware.

8.2-STABLE amd64

Yuri