Step 1: Check your network
[root@PTUDServer3 ~]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 74:46:A0:98:D0:BE
inet addr:192.168.2.133 Bcast:10.61.118.255 Mask:255.255.255.0
inet6 addr: fe80::7646:a0ff:fe98:d0be/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7002 errors:0 dropped:0 overruns:0 frame:0
TX packets:1357 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:592469 (578.5 KiB) TX bytes:118837 (116.0 KiB)
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:2456 errors:0 dropped:0 overruns:0 frame:0
TX packets:2456 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:278546 (272.0 KiB) TX bytes:278546 (272.0 KiB)
virbr0 Link encap:Ethernet HWaddr 52:54:00:D9:D3:A7
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
virbr0-nic Link encap:Ethernet HWaddr 52:54:00:D9:D3:A7
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Step 2: Set ONBOOT=yes
[root@PTUDServer3 ~]#vi/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=c47a963d-3fb0-44f5-b3c7-4ff8d619a043
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
IPADDR=192.168.2.133
PREFIX=24
GATEWAY=192.168.1.1
DNS1=10.79.255.10
HWADDR=74:46:A0:98:D0:BE
DOMAIN=10.79.255.12
LAST_CONNECT=1443171251
Step 3: Start network with OS.
[root@PTUDServer3 ~]# chkconfig network on
Step 4: Test Network
[root@PTUDServer3 ~]# service network restart
Shutting down interface eth0: Device state: 3 (disconnected)
[ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: Active connection state: activated
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/1
[ OK ]
[root@PTUDServer3 ~]# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=46 time=65.6 ms
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