The image shows a port mapping example with two Network Interface Cards with four ports each.

Each network device (port) has an associated configuration file named ifcfg-interface in the /etc/sysconfig/network-scripts directory, where X-interface is the name of the interface. The names of your ports may differ from this if you are using a different server brand. You must have identical ethernet cards installed in each system.

Configuration files ifcfg-eno1 through ifcfg-eno4 belong to the first NIC card on the motherboard and ifcfg-ens2f0 through ifcfg-ens2f3 belong to the installed NIC card.

Port 1 on each host in the diagram is the interface that you defined when you first installed the operating system.