These files and their contents might be specific/relevant in part only to cPanel
/etc/sysconfig/networking/devices/ifcfg-eth0
/etc/sysconfig/network-scripts/ifcfg-eth0
Both of the above have this content:
DEVICE=eth0
BOOTPROTO=static
BROADCAST=x.x.x.255
HWADDR=x:x:x:x:x:x
IPADDR=ip_in_question
NETMASK=255.255.255.0
NETWORK=x.x.x.0
ONBOOT=yes
/etc/sysconfig/network-scripts/ifcfg-ethx-range0
IPADDR_START=85.9.22.8
IPADDR_END=85.9.22.9
CLONENUM_START=0
NETMASK=255.255.255.0
/etc/ips (this contains only the secondary IPs listed one per line in this format ip:mask)
/etc/ipaddrpool
Potentially relevant services
/etc/rc.d/init.d/network
/etc/rc.d/init.d/ipaliases