[ale] IP Address reconfigruation in Cent OS 5 (RHEL 5.0)

[Paul Borghese]

Thanks for the suggestion but does not help.  When I run the
system-config-network-tui command it creates a new ifcfg-eth0 file with
the static IP address.

But when I reboot, the file has been changed to a DHCP configuration.

Also something else strange.  It seems as if the mac address changes with
every reboot.

Interesting, huh?

Paul Borghese

> in /usr/sbin there are a series of utilities that also take into
> account the redhat style network profiles and everything else.
>
> they are:
>
> system-config-network-tui
> system-config-network-gui
>
> These allow you to interactively reconfigure the networking, and they
> permanently rewrite all the profile files that contain networking
> information.
>
> Sure, an odd way to do things, but the redhat way, to be sure.
>
> --j
>
>
>
> On May 13, 2007, at 12:09 PM, Paul Borghese wrote:
>
>> Hi Everyone,
>>
>>
>>
>> I have a crazy problem with a Cent OS 5 (RHEL 5.0) server.  I am
>> trying to statically configure my ip address, but the server will
>> not allow it.  I have edited the file /etc/sysconfig/network-
>> scripts/ifcfg-eth0 to read the following:
>>
>>
>>
>> DEVICE=eth0
>>
>> ONBOOT=yes
>>
>> BOOTPROTO=none
>>
>> HWADDR=00:00:6c:3c:e5:f6
>>
>> NETMASK=255.255.255.0
>>
>> IPADDR=172.16.1.44
>>
>> GATEWAY=172.16.1.1
>>
>> TYPE=Ethernet
>>
>> USERCTL=no
>>
>> IPV6INIT=no
>>
>> PEERDNS=yes
>>
>>
>>
>>
>>
>> Everything works perfect. I am able to stop and restart the network
>> process (/etc/rc.d/init.d/network restart) without error.  I can
>> also manually bring the interface up/down using ifup eth0 and
>> ifdown eth0 without issue.  In both cases the IP address is
>> statically configured just as desired.
>>
>>
>>
>> But here is the problem.  When I reboot the server, the file ifcfg-
>> eth0 is automatically changed to a configuration that points to a
>> DHCP server.  So after a reboot, my box is using a DHCP server to
>> obtain addressing.  The original file is saved as ifcfg-eth0.bak.
>>
>>
>>
>> As a stop-gap measure, I could use an ifconfig statement in
>> rc.local to reset the IP address to the correct value.  But I would
>> really like to find out what is the problem and the philosophy for
>> the configuration change.
>>
>>
>>
>> I think it might have something to do with virtualization.  When I
>> installed the system, I selected to install the virtualization
>> packages thinking it would be something fun to experiment.  Later I
>> uninstalled the virtualization packages as I needed all available
>> memory for a program I need to run.
>>
>>
>>
>> Once I get a free minute, I plan to read through the rc scripts to
>> see if I can find anything, but any suggestions would be greatly
>> appreciated.
>>
>>
>>
>> Thanks!
>>
>>
>>
>> Paul Borghese
>>
>>
>>
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>
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