I know this is probably pointless but...

From: Tom Wilson 
------------------------------------------------------


I have a RHEL 6 based server in Indiana that suddenly decided to get a DHCP supplied IP address. All GUI based network management tools have vanished and the command line variant claims no interfaces exist. Ifcfg-eth0 and NetworkManager's private copy of the same have the static configuration they are supposed to have.

The interface indeed does function as it can ping their gateway and the internal hosts. I just can't configure the IP address anymore.

Hitting the logs is difficult as my pair of eyes in Indiana is a 20 something secretary that smacks her gum and makes a lot of typos  Getting the ifcfg contents read to me was a Herculean task.

Has anyone ever seen this sort of thing before and can anyone tell me why NetworkManager even exists to begin with?

I swear this makes me almost mad enough to go down the custom distro rabbit hole again.



=============================================================== From: Nick Smith ------------------------------------------------------ Would this happen to be a virtual machine? Ive ran into similar problems cloning VMs with centos/rhel that had to do with a UUID problem. This was my fix: http://www.envision-systems.com.au/blog/2012/09/21/fix-eth0-network-interface-when-cloning-redhat-centos-or-scientific-virtual-machines-using-oracle-virtualbox-or-vmware/ Not sure if it could help you or not. I do not have this problem with my ubuntu servers.....

=============================================================== From: Tom Wilson ------------------------------------------------------ No. This is a physical database server. I've encountered occasional weirdnes= s in NetworkManager since its inception but never anything quite like this.=20= =46rom the looks of your link, it addresses a changed MAC address after clon= ing a VM and I have been bitten by that before as I do all of our legacy pla= tform builds with VMs :) ith a UUID problem. ace-when-cloning-redhat-centos-or-scientific-virtual-machines-using-oracle-v= irtualbox-or-vmware/ CP supplied IP address. All GUI based network management tools have vanished= and the command line variant claims no interfaces exist. Ifcfg-eth0 and Net= workManager's private copy of the same have the static configuration they ar= e supposed to have. nternal hosts. I just can't configure the IP address anymore. hing secretary that smacks her gum and makes a lot of typos Getting the ifc= fg contents read to me was a Herculean task. NetworkManager even exists to begin with? it hole again.

=============================================================== From: Dave Brockman ------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Your first problem: There's a GUI on your server..... Can you up/down the interface? Restart networking (service)? I've seen something similar on a pfsense box, it was just easier to reload and start over however. You are insane. Uninstall DHCP client, sorry no idea what RH actually calls that. Regards, dtb -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJRk/AYAAoJEMP+wtEOVbcd6+kH/AlPpzCmacjHJxuyec+nMjH9 JVDjf2JRlxIrr/pA2lhu5JxXQ3xATdoIvnhTJQunxv5AEeDOJtPT5mPZfQT+t7iF 7g86jFr7bAsYeyxvfVSTW7jbvZ7wrSK6a1L65CkF+qMavNz5GM99VdG0rUHY0beJ bEoNU2086TuXVGdedxlwr8F+uA1l24zwgr8wWP6ve+HZXnaxu422PLvkIJ5a61XF bF16YL1H9oXbwLaGY+xpbltCLMbjXXf2j0CLxiAeBnBhPfR/xe58Oh9vuT/2naNP ppNqVo9Tn3kzH6sX5UjK9GlcwKp+c9MfqaV+4rjbjf2FDDUBm1OLIe19TuGAKPY= =3Rfq -----END PGP SIGNATURE-----

=============================================================== From: Tom WIlson ------------------------------------------------------ Red Hat, in their infinite wisdom, has taken to booting with the network adapter totally disabled. The only way to enable it at boot is via the GUI tool. This sort of idiocy seems to be de rigueur . Comes up on boot. Does not appear to be downable or restartable from the command line. I have to go on feedback from a 20 something secretary in Indiana so this needs taken into account. It's starting to look this way in my case. Yes, I am. I'd rather have working network configuration tools on a distro that sticks to what has worked for years. They call it dhclient. I'm probably going to have them FedEx it here from the looks of things.

=============================================================== From: Dave Brockman ------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I stopped using RH after 7.3. It's nice to have my good ideas validated every now and then :) Can you text her? /etc/init.d/rc.d/networking restart (whatever RH path is, and I'm sure you're supposed to use service networking restart or some other new way to do the same thing) Based on your criteria above, may I suggest you load Debian this time around? :) Regards, dtb -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJRlApeAAoJEMP+wtEOVbcdHCQH/2fcCO/nPjpMj3kHzoG1goDY 0FjXVuO+px1PEzSerCXfXX+LOEXWtdNCI+R2rfRDcDnPpQFWNJh7TUTYufF8Bujm IweVV2LLcCSbGs5RAMWaCrJBMZzVNeXwaZcPWC0GCjGnNCxKFJpxzVmxRgj0D/FD CoY/A5e+DnydQpYiO5QqhQGItIM4+hFQjK8/OAd/PVfGwOCJeBAyAej7KcCoWiWy MY1861z56C2R26azWQyvDcR1Qo5+sPiWA4/tEQZZoKgOQdS51qr+lCQd6uPE82fF 6cwzT5Hw+a8v3GNh8lki0q5M7KGCVkAfCEU8STOkfPIPLOMFsFX/ZFvTiCc+V14= =q5Fc -----END PGP SIGNATURE-----

=============================================================== From: Tom Wilson ------------------------------------------------------ RHEL was fine through 5. At least contributions by developers with itches in strange places could be easily bypassed. Now, not so much. Attempting to down the interface via the init script results in an OK message....and an interface that is still active. Already been down that road. Unfortunately, I already support multiple varieties of Linux, Windows and soon OSX plus Android, and iOS mobile clients. (On the plus side I have finally killed the Palm OS client...Requiescat in pace) The thoughts of adding yet another platform gives me hives but I definitely will consider support for something a bit more conservative. I do not like the direction Red Hat is headed.