Bringing up interface eth0: Determining if ip address 10.109.67.81 is already in use for device eth0...

重启网卡出现提示：
Bringing up interface eth0:  Determining if ip address 10.109.67.81 is already in use for device eth0...
                                                           [  OK  ]
Bringing up interface eth1:  Determining if ip address 10.109.67.83 is already in use for device eth1...
                                                           [  OK  ]

该警告一般是由于网卡解析arp协议导致的，可在网卡的配置文件中加入ARPCHECK=NO参数来屏蔽该检查
[root@rac01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=none
IPADDR=10.109.67.81
PREFIX=24
GATEWAY=10.109.67.254
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME=eth0
UUID=86d44060-4579-48cc-b85b-219a206ca37c
ONBOOT=yes
HWADDR=00:50:56:95:09:76
LAST_CONNECT=1411004329
ARPCHECK=no

再次启动网卡，一切正常
[root@rac01 ~]# service network restart
Shutting down interface eth0:                              [  OK  ]
Shutting down interface eth1:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:                                [  OK  ]
Bringing up interface eth1:                                [  OK  ]