[ale] total server wierdness

[vernard at gmail.com (Vernard Martin)]

On 11/15/2014 05:36 PM, Jim Kinney wrote:
> A CentOS 6.6 system decided that the network setup was to be ignored. 
> A single nic that was configured for static IP went bozo and switched 
> itself into DHCP mode. The configuration was still static IP. It even 
> showed it was checking for the static IP being in use before it 
> finalized the setup and reported it was all OK. Then it goes and gets 
> an IP address from itself since it's the DHCP server.
>
> There are 2 other nic and they had no problems. The problem nic is a 
> 10G card and the other 2 are motherboard 1G.
>
> It was working without any issues for a year in this configuration. 
> The last change was to add an Ubuntu 14.04 TFTP bootable kernel to the 
> TFT server and menu for PXE booting new server configs.
>
> Anyone seen anything like this before?
>
Yup. Had almost that exact situation happen to me a few days ago. 
Someone installed a software package that had NetworkManager in its 
dependency chain.  After the install and subsequent reboot, 
NetworkManager tried to take control over everything and horked 
everything up.

Vernard