Permanent IP address

quark_arc · 01-19-2011, 07:23 AM

Hi,

We have a Linux 5.4 version running on HP DL380. I assigned the IP address to the eth0 interface using the menu Settings --> Networks --> interface. Then I rebooted the machine and used "ifconfig -a" to check the IP, but it didn't show any IP assigned to eth0.

Then I manually added the IP to eth0 as follows:

ifconfig eth0 10.125.9.161 netmask 255.255.255.248
route add default gw 10.125.9.166

ifconfig -a showed the IP address assigned. However on reboot, it didn't show any IP to eth0.

To permanently assign the IP address, do I have to define it in some configuration file?

acid_kewpie · 01-19-2011, 07:28 AM

Yes you do. Use the system-config-network tool or directly edit /etc/sysconfig/network-scripts/ifcfg-eth0

kaushalpatel1982 · 01-19-2011, 08:46 AM

do check *onboot* should be *yes* in configuration file.

TB0ne · 01-19-2011, 09:30 AM

Quote:

Originally Posted by kaushalpatel1982

do check *onboot* should be *yes* in configuration file.

Sorry, this is bad advice, and doesn't address the OP's question, and is incorrect to boot. The option is STARTMODE, and it should be set to 'onboot'.

Also, the OP asked how to assign a static address, not how to make sure the interface is active on boot. acid_kewpie posted the correct solution, which is to use the system configuration tool, or edit the file. In the file, the OP needs to set the IPADDR and NETMASK parameters, along these lines:

Code:

STARTMODE='onboot'
BOOTPROTO='static'
IPADDR='10.9.8.7'
NETMASK='255.255.255.0'

telling the interface to start on boot, use the IP address/netmask as shown, and that it's a static address, not DHCP provided.

acid_kewpie · 01-19-2011, 10:37 AM

Personally I've never seen a "STARTMODE" parameter. No sign of it in the init scripts of ifup scripts on centos 5.5

TB0ne · 01-19-2011, 11:29 AM

Quote:

Originally Posted by acid_kewpie

Personally I've never seen a "STARTMODE" parameter. No sign of it in the init scripts of ifup scripts on centos 5.5

Huh...I've got it in openSUSE...that's one of my interface-config scripts, with only the address changed. I've seen "onboot" and "manual" in there.

kaushalpatel1982 · 01-19-2011, 09:22 PM

TB0ne, I have just followed the line give below.

Quote:

ifconfig -a showed the IP address assigned. However on reboot, it didn't show any IP to eth0.

TB0ne · 01-20-2011, 08:31 AM

Quote:

Originally Posted by kaushalpatel1982

TB0ne, I have just followed the line give below.

Then you didn't enter and/or save the values correctly.

You SHOULD go through the system-network configuration tool, and make sure you set a static address, and that everything is set correctly. If not, edit /etc/sysconfig/network-scripts/ifcfg-eth0 as you were told above, and put the values in as shown.

The line you quoted is a command that sets is temporarily...both myself and acid_kewpie gave you the answer, neither of which involve running ifconfig. Follow the instructions given.