ARP is broadcast to the layer 2 local segment; link detection refers
to the layer 1 local segment, which is not necessarily the same.
On the other hand, doing link detection is extremely useful for a
portable computer: when I plug in my Ethernet cable in a portable
system I want it to try to start doing DHCP detection and anything
else that is normally associated with the interface being "up" at that
-- <firstname.lastname@example.org> at work, <email@example.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt <firstname.lastname@example.org> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to email@example.com More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/