> 02/21-16:27:07.393165 ARP who-has 10.0.0.25 tell 10.10.10.11 Clearly if you are sending on a LAN then you will need to make a fake ARP cache entry for your non-existent node. see: man arp > ttcp-t: connect: No route to host > Segmentation fault This means that somehow you've got the broadcast address wrong. There's no route to that address from your machine.