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Red Hat Enterprise Linux (RHEL) 4 ifconfig adding an alias

June 12, 2007 @ 8:27 am · Filed under Technology

I’ve setup multiple IPs on FreeBSD before, so I expected the process to be about the same for RHEL 4. It took me about a half hour to figure out that I didn’t want to create an alias (at least not by using that terminology). I finally found this site which helped me through it.

Manual:

ifconfig eth0:0 up 192.168.1.2 netmask 255.255.255.0
ifconfig eth0:1 up 192.168.1.3 netmask 255.255.255.0

Automatic:
In /etc/sysconfig/network-scripts/ifcfg-eth0:0 put

DEVICE=eth0:0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.2
NETMASK=255.255.255.0

In /etc/sysconfig/network-scripts/ifcfg-eth0:1 put

DEVICE=eth0:1
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.3
NETMASK=255.255.255.0

That’s it!

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