Get IP from DHCP if exists, if not then set to <THIS_IP>

IanVaughan · 05-07-2010, 06:47 AM

I have my network getting their IP's via the DHCP server.
But when they get unpluged/moved, I need them to set themselfs a known static IP.

How can this be done?

RHELv5

Code:

cat /etc/sysconfig/networking/profiles/default/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:1c:25:d3:5b:ff
ONBOOT=yes
TYPE=Ethernet
#IPADDR=192.168.109.2

SuperJediWombat! · 05-07-2010, 07:42 AM

It should be something to do with dhclient, try looking here:

Code:

man dhclient.conf

This is what you want your dhclient.conf file to be called...

Code:

/etc/dhclient-${DEVICE}.conf

SuperJediWombat! · 05-07-2010, 08:28 AM

Try this:

Code:

alias {
  interface "eth0";
  fixed-address 192.168.2.2;
  option subnet-mask 255.255.255.0;
  option routers 192.168.2.250;
  option domain-name-servers 192.168.2.250;
}

If you are using network-manager, it may stop this from working.