On 02.08.2012 15:00, Birta Levente wrote:
> 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
>
>
>
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You can (and are encouraged) to specify the NETMASK as well in that
range file. I don't know why it uses that mask and broadcast; maybe it
inherits them from other already configures interface?
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
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