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my ifconfig says
eth0      Link encap:Ethernet  HWaddr 00:B0:D0:3E:76:14
          inet addr:192.168.0.232  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::2b0:d0ff:fe3e:7614/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:85376 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56915 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:37887177 (36.1 MiB)  TX bytes:8049832 (7.6 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1757 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1757 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2571824 (2.4 MiB)  TX bytes:2571824 (2.4 MiB)


while my /etc/sysconfig/network-scripts/ifcfg-eth0 is


# Intel Corporation 82557/8/9 [Ethernet Pro 100]
DEVICE=eth0
BOOTPROTO=static
BROADCAST=90.255.255.255
ONBOOT=yes
HWADDR=00:b0:d0:3e:76:14
TYPE=Ethernet
NETMASK=255.0.0.0
IPADDR=90.90.90.1
NETWORK=90.0.0.0
GATEWAY=192.168.0.1