Add multiple IP addresses
You can assign multiple ip address range as follows to eth0:
vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0
Append following code from 202.54.112.120 to 202.54.112.140:
IPADDR_START=202.54.112.120 IPADDR_END=202.54.112.140 CLONENUM_START=0 NETMASK=255.255.255.0Save and close the file, then restart network service
for CentOS 7
add to ifcfg file
IPADDR0=x.x.x.x
PREFIX0=24
etc