Ping Range using fping

Fping is a tool that allows you to list a network quickly and specify network range are determined which are active ip in that range.

Get a version and download

http://rpm.pbone.net/index.php3/stat/3/srodzaj/1/search/fping

In Centos 5 download.

#wget centos.karan.org/el5/extras/testing/i386/RPMS/fping-2.4b2-7.el5.kb.i386.rpm

Install 

#rpm -i fping-2.4b2-7.el5.kb.i386.rpm

In our institution we use this tool to find the IP addresses teams are active and are active.
#Fping-a-g [host]                  that we do for the entire network

Example
#fping -s -g 192.168.1.1 192.168.1.254