What happens if you try setting a static IP address on an interface? [by dejanst]
I tried to add a second LAN addresses in CentOS 6.3 on a brand new install and it's not working.
I installed a new copy of CentOS 5.7 and tried the same and it worked right away.
Now I'm just trying to setup the alias on the same subnet and it's not working.
When I has CentOS 6.5, I had my IP set to this static address: 192.168.1.109.
That is what I wanted with CentOS 7. Unfortunately, I was not able to install CentOS 7 with a static IP address. It just would not let me.
So I edited ifcfg-enp3s0. I set up the static IP address, and it worked. I can ping other computers on my home network, and other computers can ping me. No problem.