On a RedHat 6.1 box ifconfig shows eth0 inet addr:10.75.20.201 Bcast:10.75.20.255 Mask: 255.255.0.0 This is a large production network. The correct subnet is 255.255.0.0 there is no other PC with a dup address. If I ping -b 10.75.20.255 I will recieve a reply from my self only. If I ping -b 10.75.255.255 I recieve replies from all over the subnet. Does if config show the correct broadcast address? Can you manually set the broadcast?