Hi all Can someone explain me this: ifcfg-eth0-range1: ONBOOT="yes" IPADDR_START="192.168.1.48" IPADDR_END="192.168.1.55" CLONENUM_START="1" Why Bcast is 192.168.1.51 and why Mask is 255.255.255.252 ? OS: Centos 6.3/64bit Thanks Levi # ifconfig eth0:1 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.48 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:2 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.49 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:3 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.50 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:4 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.51 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:5 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.52 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:6 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.53 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:7 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.54 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000 eth0:8 Link encap:Ethernet HWaddr 00:9C:02:99:FA:00 inet addr:192.168.1.55 Bcast:192.168.1.51 Mask:255.255.255.252 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:fbee0000-fbf00000