Ok, As I couldn't understand to configure NM to disable this zeroconf/ipv4ll stuff (where's the doc?!?), I've tried to use ifplugd.
It's a neat package, but there are gotcha: 1- you need to configure it, because by default it won't monitor any interface, despite what's writen in its man page (option -i); 2- you need to uninstall avahi-autoipd, as otherwise, it will do its thing and you'll end up with a default route to 169.254.... So, in my case, by uninstalling avahi-autoipd and installing and configuring ifplugd, I could overcome this issue. So, now, I've a nice system that automatically set up my ethernet network interface when needed (ie: when there's a cable plugged in), but without ipv4ll (RFC3927) support. Cyrille
