IPADDR_START ..

/etc/sysconfig/network-scripts/ifcfg-eth0-range0
IPADDR_START=192.168.0.100
IPADDR_END=192.168.0.200
CLONENUM_START=1 ---it can be any number. The devices will be numbered starting from it, e.g. if CLONENUM_START=5, then the first will be eth0:5.