If you use Centos, you might use this tips to solved this problem. 

Edit /etc/sysconfig/network-scripts/ifup-eth

if [ $? = 1 ]; then
    ARPINGMAC=$(echo $ARPING |  sed -ne 's/.*\[\(.*\)\].*/\1/p')
                        net_log $"Error, some other host ($ARPINGMAC) already uses address ${ipaddr[$idx]}."
    # exit 1 <--- comment this line.

Then start the network using ifup

ifup eth0