debian:~# nmap -sP 192.168.198.0/24


Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2008-03-31 23:01 BST
Host 192.168.198.1 appears to be up.
MAC Address: 00:50:56:C0:00:08 (VMWare)
Host 192.168.198.2 appears to be up.
MAC Address: 00:50:56:E3:7D:40 (VMWare)
Host 192.168.198.128 appears to be up.
Host 192.168.198.254 appears to be up.
MAC Address: 00:50:56:EC:90:88 (VMWare)
Nmap finished: 256 IP addresses (4 hosts up) scanned in 5.694 seconds