Hi all,
According to the design document of OVS Tunnel Manager 
(https://cwiki.apache.org/CLOUDSTACK/ovs-tunnel-manager-for-cloudstack.html),
I have configured “sdn.ovs.controller” to true, and create one advanced zone 
with one physical network whose isolation method is “GRE”.
Advacned zone is created successfully, but when creating new instance, it will 
pop follow error,
“Unable to create a deployment for VM”, and following logs within “vmops.log”.
If have any suggestion or references for this problem ?
I used CloudStack 4.0.1/4.1 + XenServer 6.0.2. If need another configuration on 
XenServer or CloudStack ?
Thanks a lot.

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2013-05-16 14:54:12,508 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Lock is acquired for network id 204 as a part of 
network implement
2013-05-16 14:54:12,508 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Asking OvsGuestNetworkGuru to implement 
Ntwk[204|Guest|8]
2013-05-16 14:54:12,512 DEBUG [db.Transaction.Transaction] 
(Job-Executor-11:job-11) Rolling back the transaction: Time = 1 Name =  
-AsyncJobManagerImpl$1.run:401-Executors$RunnableAdapter.call:471-FutureTask$Sync.innerRun:334-FutureTask.run:166-ThreadPoolExecutor.runWorker:1146-ThreadPoolExecutor$Worker.run:615-Thread.run:679;
 called by 
-Transaction.rollback:890-Transaction.removeUpTo:833-Transaction.close:657-TransactionContextBuilder.interceptComplete:56-ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept:131-DataCenterDaoImpl.allocateVnet:192-ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept:125-OvsGuestNetworkGuru.allocateVnet:97-GuestNetworkGuru.implement:326-OvsGuestNetworkGuru.implement:114-NetworkManagerImpl.implementNetwork:1425-ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept:125
2013-05-16 14:54:12,512 INFO  [utils.exception.CSExceptionErrorCode] 
(Job-Executor-11:job-11) Could not find exception: 
com.cloud.exception.InsufficientVirtualNetworkCapcityException in error code 
list for exceptions
2013-05-16 14:54:12,512 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Cleaning up because we're unable to implement the 
network Ntwk[204|Guest|8]
2013-05-16 14:54:12,519 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Releasing 0 port forwarding rules for network id=204 
as a part of shutdownNetworkRules
2013-05-16 14:54:12,519 DEBUG [network.firewall.FirewallManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,520 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Releasing 0 static nat rules for network id=204 as a 
part of shutdownNetworkRules
2013-05-16 14:54:12,520 DEBUG [network.firewall.FirewallManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,521 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,521 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Releasing 0 firewall ingress rules for network id=204 
as a part of shutdownNetworkRules
2013-05-16 14:54:12,521 DEBUG [network.firewall.FirewallManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,522 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Releasing 0 firewall egress rules for network id=204 
as a part of shutdownNetworkRules
2013-05-16 14:54:12,522 DEBUG [network.firewall.FirewallManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,523 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Releasing 0 Network ACLs for network id=204 as a part 
of shutdownNetworkRules
2013-05-16 14:54:12,523 DEBUG [network.firewall.FirewallManagerImpl] 
(Job-Executor-11:job-11) There are no rules to forward to the network elements
2013-05-16 14:54:12,524 DEBUG [network.rules.RulesManagerImpl] 
(Job-Executor-11:job-11) Found 0 static nat rules to apply for network id 204
2013-05-16 14:54:12,531 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Sending network shutdown to VirtualRouter
2013-05-16 14:54:12,532 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Network id=204 is shutdown successfully, cleaning up 
corresponding resources now.
2013-05-16 14:54:12,536 DEBUG [cloud.network.NetworkManagerImpl] 
(Job-Executor-11:job-11) Lock is released for network id 204 as a part of 
network implement
2013-05-16 14:54:12,536 INFO  [cloud.vm.VirtualMachineManagerImpl] 
(Job-Executor-11:job-11) Insufficient capacity
com.cloud.exception.InsufficientVirtualNetworkCapcityException: Unable to 
allocate vnet as a part of network Ntwk[204|Guest|8] implement Scope=interface 
com.cloud.dc.DataCenter; id=1
        at 
com.cloud.network.guru.OvsGuestNetworkGuru.allocateVnet(OvsGuestNetworkGuru.java:99)
        at 
com.cloud.network.guru.GuestNetworkGuru.implement(GuestNetworkGuru.java:326)
        at 
com.cloud.network.guru.OvsGuestNetworkGuru.implement(OvsGuestNetworkGuru.java:114)
        at 
com.cloud.network.NetworkManagerImpl.implementNetwork(NetworkManagerImpl.java:1425)
        at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125)
        at 
com.cloud.network.NetworkManagerImpl.prepare(NetworkManagerImpl.java:1596)
        at 
com.cloud.vm.VirtualMachineManagerImpl.advanceStart(VirtualMachineManagerImpl.java:746)
        at 
com.cloud.vm.VirtualMachineManagerImpl.start(VirtualMachineManagerImpl.java:471)
        at 
org.apache.cloudstack.engine.cloud.entity.api.VMEntityManagerImpl.deployVirtualMachine(VMEntityManagerImpl.java:212)
        at 
org.apache.cloudstack.engine.cloud.entity.api.VirtualMachineEntityImpl.deploy(VirtualMachineEntityImpl.java:209)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3865)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3458)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3444)
        at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125)
        at 
org.apache.cloudstack.api.command.user.vm.DeployVMCmd.execute(DeployVMCmd.java:379)
        at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:162)
        at 
com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:437)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:679)
2013-05-16 14:54:12,550 DEBUG [cloud.vm.VirtualMachineManagerImpl] 
(Job-Executor-11:job-11) Cleaning up resources for the vm 
VM[User|251b392c-11ed-432d-9122-1dc6d0692e3f] in Starting state

...

2013-05-16 14:54:12,746 DEBUG [cloud.capacity.CapacityManagerImpl] 
(Job-Executor-11:job-11) VM state transitted from :Stopped to Error with event: 
OperationFailedToErrorvm's original host id: null new host id: null host id 
before state transition: null
2013-05-16 14:54:12,771 INFO  [user.vm.DeployVMCmd] (Job-Executor-11:job-11) 
com.cloud.exception.InsufficientServerCapacityException: Unable to create a 
deployment for VM[User|251b392c-11ed-432d-9122-1dc6d0692e3f]Scope=interface 
com.cloud.dc.DataCenter; id=1
2013-05-16 14:54:12,771 INFO  [user.vm.DeployVMCmd] (Job-Executor-11:job-11) 
Unable to create a deployment for VM[User|251b392c-11ed-432d-9122-1dc6d0692e3f]
com.cloud.exception.InsufficientServerCapacityException: Unable to create a 
deployment for VM[User|251b392c-11ed-432d-9122-1dc6d0692e3f]Scope=interface 
com.cloud.dc.DataCenter; id=1
        at 
com.cloud.vm.VirtualMachineManagerImpl.advanceStart(VirtualMachineManagerImpl.java:728)
        at 
com.cloud.vm.VirtualMachineManagerImpl.start(VirtualMachineManagerImpl.java:471)
        at 
org.apache.cloudstack.engine.cloud.entity.api.VMEntityManagerImpl.deployVirtualMachine(VMEntityManagerImpl.java:212)
        at 
org.apache.cloudstack.engine.cloud.entity.api.VirtualMachineEntityImpl.deploy(VirtualMachineEntityImpl.java:209)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3865)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3458)
        at 
com.cloud.vm.UserVmManagerImpl.startVirtualMachine(UserVmManagerImpl.java:3444)
        at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125)
        at 
org.apache.cloudstack.api.command.user.vm.DeployVMCmd.execute(DeployVMCmd.java:379)
        at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:162)
        at 
com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:437)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:679)

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