In centos 7 by default ifconfig command will not work.
You need to install it using this command yum install net-tools
1. Create a file in /opt/1.sh
2. create ip list in an excel sheet,
Example:
| ip addr add | 198.xxx.xx.xx | dev enp6s0f0 label | enp6s0f0:1 | |||
| ip addr add | 198.xxx.xx.xx | dev enp6s0f0 label | enp6s0f0:2 | |||
| ip addr add | 198.xxx.xx.xx | dev enp6s0f0 label | enp6s0f0:3 | |||
| ip addr add | 198.xxx.xx.xx | dev enp6s0f0 label | enp6s0f0:4 | |||
3. Add ips in /opt/1.sh file
4. Execute sh 1.sh for the ips to display in ifconfig
5. For the ips to reflect in ifconfig even after server is rebooted add this command sh /opt/1.sh in /etc/rc.d/init.d/network file and it should be added above exit $rc