[CentOS] Upgrade of CentOS 6.6 to 6.7

After the upgrade, I was encountering a "network unreachable" error. 
This happens on kernel versions -> 2.6.32-573.1 .1-el6.x86_64 and 
2.6.32-573.3.1-el6.x86_64. If I revert back to 
2.6.32.504.30.3.el6.x86_64, the problem goes away. I've been searching 
frantically without much luck. I have found references to the same error 
on bugs.centos.org but no resolution as of yet. Has anyone else 
encountered this? If so, what did you do to resolve it?

TIA,
John

-- 
John Tebbe
Pro-Tech Interconnect Solutions, LLC
Main   952-442-2189
Direct 952-479-6272
Email  johnt at protechmn.com