[CentOS] multiple external addresses on one interface

Wed Apr 13 21:35:57 UTC 2005
ryanag at zoominternet.net <ryanag at zoominternet.net>

I want to add two IP ranges on one NIC card (eth0 and eth0:1). Has
anyone done this before? 

The CentOS 4 gui keeps locking up when I try it there and the command
line ifconfig seems to work, but ifup always returns the error that is
never heard (no such device) of eth0:1

thanks