Reliable Penguin

RedHat supports the configuration of alias interfaces via network scripts of the for "ifcfg-eth0:0" as described in the documentation here:

http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/ref-guide/s1-networkscripts-interfaces.html

Additionally there is undocumented support for alias ranges. Using a single network script of the form "ifcfg-eth0-range0" a set of alias interfaces can be defined. This if very handly when setting up several aliases on a web server.

Here's a sample config file named "ifcfg-eth0-range0":

DEVICE=eth0
BOOTPROTO=static
HWADDR=00:0C:F1:D7:BB:6F
ONBOOT=yes
TYPE=Ethernet
IPADDR_START=70.84.242.240
IPADDR_END=70.84.242.247
CLONENUM_START=240
NETMASK=255.255.255.255
NO_ALIASROUTING=yes


Alias interfaces can be manually activated/deactivated with "ifup eth0-range0" or "ifdown eth0-range0".