I would just like to point out that this answer is inaccurate.  The file doesn't 
HAVE to be called ifcfg-eth1.  It DOES have to start with ifcfg- and what it 
ends with is what ifup is told to start.

e.g. create a file called ifcfg-home
do ifup home and you will see that it uses ifcfg-home to bring the device up.

What tells ifup and ifdown what device to actually bring up or down is the 
DEVICE= line in the file.

So, you could create configurations for your various network devices based on 
profiles and have the device reconfigured for that profile.

E.g. one for home, one for work, one for school, and one for on the road.

> Yes, you would need one named ifcfg-eth1 for device eth1. 

>>[mikeaz_laptop@localhost ~]$ cat /etc/sysconfig/network-scripts/ifcfg-eth1
>>cat: /etc/sysconfig/network-scripts/ifcfg-eth1: No such file or directory
>>[mikeaz_laptop@localhost ~]$ cat /etc/sysconfig/network-scripts/ifcfg-eth0
>>DEVICE=eth0
>>BOOTPROTO=dhcp
>>ONBOOT=yes
>>TYPE=Ethernet
>>[mikeaz_laptop@localhost ~]$
>>
>>I'm guessing that since this is set to be eth0 I need to make an 
>>identical one named ifcg-eth1.
>>
>>because it always seems to be eth1 for my wifi card.
>>
>>any ideas?

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