When updating to RHEV hypervisor 20140212.1, network devices get renamed

Issue

• When updating to RHEV hypervisor 20140212.1 or 20140213.0 network devices get renamed. For example, eth0 gets renamed as p2p1
• The previously attached logical network becomes unattached. When re-attaching, we get the error message:

Illegal Network Parameters

• Not all interfaces may be affected with this error
• As a consequence, we cannot activate the hypervisor (required network not present). When reinstalling previous working version, the interface names stay the same (so hypervisor still cannot be activated)
• In /var/log/vdsm/supervdsm.log, we see:

MainProcess|Thread-46::INFO::2014-02-18 00:07:07,188::netinfo::487::root::(_getNetInfo) Obtaining info for net eth0.
Traceback (most recent call last):
  File "/usr/lib64/python2.6/site-packages/vdsm/netinfo.py", line 482, in _getNetInfo
  File "/usr/lib64/python2.6/site-packages/vdsm/netinfo.py", line 244, in getMtu
IOError: [Errno 2] No such file or directory: u'/sys/class/net/eth0/mtu'

• After upgrade RHEV hypervisor we have problem with network connectivity
• Network Issues after upgrading hypervisor from 6.5-20140212.1 to 6.5-20140213.0
• Installing rhevh-6.5-20140217.0 on a RHEV-H host breaks all NIC connectivity.