Created attachment 771606 [details]
screenshot 1

Description of problem:
Error message 
"Network interface name is already in use"
appears on new VM creation

Version-Release number of selected component (if applicable):
oVirt Engine Version: 3.3.0-0.7.master.el6ev 

How reproducible:
100%

Steps to Reproduce:
1. Create new VM (use predefined settings, change only name) (see screenshot)

Actual results:
Error message 
"Network interface name is already in use"
appears on new VM creation

Expected results:
VM created without error message

Additional info:

2013-07-10 15:28:18,013 INFO  [org.ovirt.engine.core.bll.AddVmFromScratchCommand] (ajp-/127.0.0.1:8702-9) Lock Acquired to object EngineLock [exclusiveLocks= key: 1 value: VM_NAME
, sharedLocks= ]
2013-07-10 15:28:18,080 INFO  [org.ovirt.engine.core.bll.AddVmFromScratchCommand] (ajp-/127.0.0.1:8702-9) Running command: AddVmFromScratchCommand internal: false. Entities affected :  ID: ed4fa607-b21a-4e6f-b33f-ec97ee461532 Type: VdsGroups
2013-07-10 15:28:18,209 INFO  [org.ovirt.engine.core.bll.AddVmFromScratchCommand] (ajp-/127.0.0.1:8702-9) Lock freed to object EngineLock [exclusiveLocks= key: 1 value: VM_NAME
, sharedLocks= ]
2013-07-10 15:28:18,251 WARN  [org.ovirt.engine.core.bll.network.vm.AddVmInterfaceCommand] (ajp-/127.0.0.1:8702-8) [26391c26] CanDoAction of action AddVmInterface failed. Reasons:VAR__TYPE__INTERFACE,VAR__ACTION__ADD,NETWORK_INTERFACE_NAME_ALREADY_IN_USE