quoted

Replying again... Alan does mention in the paragraph you've quoted
to use arpfilter, which works for every case imaginable.

No it doesn't. When I have two nics on DHCP on the same ethernet segment, it
cannot be made to work. I don't know the ip addresses beforehand. And if if
I would get them with scripting and crafted some rules on the fly, there's
no way I can be sure I'll get the same IP's on a renew, so I'd have to check
often.

Regards,
Bas