arplookup: unable to enter address for 192.168.100.1@00:10:95:ff:ff:fe on ep0 (host is not
on local network)

I get lots of these warning messages to syslog (one per half an hour). Is there a way I
could override these messages? That address belongs to cablemodem which is used to 
access it's internal services (eg. web server for statistics).
I quess that the warning message happens because the inet address of ep0 is 212.14?.*