Hi,
I am getting this message regularly in /var/log/messges

NET: 479 messages suppressed.
kernel: martian source 0.0.0.240 from 0.0.0.240, on dev eth0
kernel: ll header: ff:ff:ff:ff:ff:ff:00:30:48:2a:07:d8:08:06

two times server rebooted, then also same thing happening.