[CentOS] alias ip-addresses at loopback

Mon Sep 15 12:35:46 UTC 2008
Robert Moskowitz <rgm at htt-consult.com>

Dmitry Cherkasov wrote:
> Hello everybody!
> Could anybody advice on the following problem.
> I need to assign several ip-addresses to 'lo' interface (beside
> It is convenient to me to implement NAT with such
> addresses.
> I can easily assign these addresses on running system with 'ip address
> add <some addr/prefix> dev lo'. Yet I cannot understand how to make
> these settings apply on boot time. Certainly it is possible to patch
> standard system scripts like /etc/rc.d/init.d/network, but I suppose
> there must be more straight way to do this.
This is well enough explained in 

In /etc/sysconfig/network-scripts you need to create a file: ifcfg-l0:1 
where all you really need is the ipaddr and netmask values.