Created attachment 600312 [details]
logs

Description of problem:
if user tries to switch rhevm interface from one NIC to another it leads to rollback

Version-Release number of selected component (if applicable):
oVirt Engine Version: '3.1.0-7.el6ev' 

How reproducible:
100%

Steps to Reproduce:
1.add host with more than 1 NIC to setup
2.set rhevm interface with static IP (e.g IP:10.34.66.81, GW: 10.34.66.254, MASK 255.255.255.0)
3.Setup Host Networks -> switch rhevm network to another NIC and adjust static IP 
(e.g IP:10.34.67.13, GW: 10.34.67.30, MASK 255.255.255.224)
4. click OK

Actual results:
it is not possible to switch rhevm interface from one NIC to another

Expected results:
it should possible to switch rhevm interface from one NIC to another

Additional info:
Thread-320::ERROR::2012-07-25 15:40:34,753::API::1116::vds::(setupNetworks) connectivity check failed
Traceback (most recent call last):
  File "/usr/share/vdsm/API.py", line 1114, in setupNetworks
    supervdsm.getProxy().setupNetworks(networks, bondings, options)
  File "/usr/share/vdsm/supervdsm.py", line 59, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 57, in <lambda>
    callMethod = lambda : getattr(self._supervdsmProxy._svdsm, self._funcName)(*args, **kwargs)
  File "<string>", line 2, in setupNetworks
  File "/usr/lib64/python2.6/multiprocessing/managers.py", line 740, in _callmethod
    raise convert_to_error(kind, result)
ConfigNetworkError: (10, 'connectivity check failed')