Originally Posted by latcarf
I the guide for the set-up of FC4 after the the installation is done and we reboot the first thing we do is configure (or add) an additional network interface as eth0:0.
What is the purpose of this additional interface?
Sometimes you have more than one IP address on a server. Let's say you have your server housed in some ISP's data center, and that ISP gives you 4 IP addresses instead of one, e.g. 18.104.22.168 - 22.214.171.124, but your server does not have 4 network cards. Then you have to configure virtual interfaces (e.g. eth0:0 - eth0:2).
If you have only one IP address, then there's no use adding virtual interfaces.