diff --git a/engine/orchestration/src/com/cloud/vm/VirtualMachineManagerImpl.java b/engine/orchestration/src/com/cloud/vm/VirtualMachineManagerImpl.java
index 5096ed4759e..c9322e4e8ca 100755
--- a/engine/orchestration/src/com/cloud/vm/VirtualMachineManagerImpl.java
+++ b/engine/orchestration/src/com/cloud/vm/VirtualMachineManagerImpl.java
@@ -38,6 +38,7 @@ import javax.ejb.Local;
 import javax.inject.Inject;
 import javax.naming.ConfigurationException;
 
+import com.cloud.network.router.VirtualRouter;
 import org.apache.log4j.Logger;
 
 import org.apache.cloudstack.affinity.dao.AffinityGroupVMMapDao;
@@ -609,8 +610,12 @@ public class VirtualMachineManagerImpl extends ManagerBase implements VirtualMac
         } catch (InsufficientCapacityException e) {
             throw new CloudRuntimeException("Unable to start a VM due to insufficient capacity", e).add(VirtualMachine.class, vmUuid);
         } catch (ResourceUnavailableException e) {
-            throw new CloudRuntimeException("Unable to start a VM due to concurrent operation", e).add(VirtualMachine.class, vmUuid);
+            if(e.getScope() != null && e.getScope().equals(VirtualRouter.class)){
+                throw new CloudRuntimeException("Network is unavailable. Please contact administrator", e).add(VirtualMachine.class, vmUuid);
+            }
+            throw new CloudRuntimeException("Unable to start a VM due to unavailable resources", e).add(VirtualMachine.class, vmUuid);
         }
+
     }
 
     protected boolean checkWorkItems(VMInstanceVO vm, State state) throws ConcurrentOperationException {
diff --git a/server/src/com/cloud/network/router/NetworkHelper.java b/server/src/com/cloud/network/router/NetworkHelper.java
index 711c02df86e..6c610161267 100644
--- a/server/src/com/cloud/network/router/NetworkHelper.java
+++ b/server/src/com/cloud/network/router/NetworkHelper.java
@@ -38,7 +38,7 @@ import com.cloud.vm.VirtualMachineProfile.Param;
 public interface NetworkHelper {
 
     public abstract boolean sendCommandsToRouter(VirtualRouter router,
-            Commands cmds) throws AgentUnavailableException;
+            Commands cmds) throws AgentUnavailableException, ResourceUnavailableException;
 
     public abstract void handleSingleWorkingRedundantRouter(
             List<? extends VirtualRouter> connectedRouters,
diff --git a/server/src/com/cloud/network/router/NetworkHelperImpl.java b/server/src/com/cloud/network/router/NetworkHelperImpl.java
index d2b160f7af4..968251cc4a7 100644
--- a/server/src/com/cloud/network/router/NetworkHelperImpl.java
+++ b/server/src/com/cloud/network/router/NetworkHelperImpl.java
@@ -160,11 +160,11 @@ public class NetworkHelperImpl implements NetworkHelper {
     }
 
     @Override
-    public boolean sendCommandsToRouter(final VirtualRouter router, final Commands cmds) throws AgentUnavailableException {
+    public boolean sendCommandsToRouter(final VirtualRouter router, final Commands cmds) throws AgentUnavailableException, ResourceUnavailableException {
         if (!checkRouterVersion(router)) {
             s_logger.debug("Router requires upgrade. Unable to send command to router:" + router.getId() + ", router template version : " + router.getTemplateVersion()
                     + ", minimal required version : " + VirtualNetworkApplianceService.MinVRVersion);
-            throw new CloudRuntimeException("Unable to send command. Upgrade in progress. Please contact administrator.");
+            throw new ResourceUnavailableException("Unable to send command. Router requires upgrade", VirtualRouter.class, router.getId());
         }
         Answer[] answers = null;
         try {
diff --git a/server/src/com/cloud/network/router/VirtualNetworkApplianceManager.java b/server/src/com/cloud/network/router/VirtualNetworkApplianceManager.java
index 8e0aba4a622..9fb47fde4f3 100644
--- a/server/src/com/cloud/network/router/VirtualNetworkApplianceManager.java
+++ b/server/src/com/cloud/network/router/VirtualNetworkApplianceManager.java
@@ -91,7 +91,7 @@ public interface VirtualNetworkApplianceManager extends Manager, VirtualNetworkA
 
     boolean removeDhcpSupportForSubnet(Network network, List<DomainRouterVO> routers) throws ResourceUnavailableException;
 
-    public boolean prepareAggregatedExecution(Network network, List<DomainRouterVO> routers) throws AgentUnavailableException;
+    public boolean prepareAggregatedExecution(Network network, List<DomainRouterVO> routers) throws AgentUnavailableException, ResourceUnavailableException;
 
-    public boolean completeAggregatedExecution(Network network, List<DomainRouterVO> routers) throws AgentUnavailableException;
+    public boolean completeAggregatedExecution(Network network, List<DomainRouterVO> routers) throws AgentUnavailableException, ResourceUnavailableException;
 }
diff --git a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
index 23ddfb178d9..e56812e89de 100644
--- a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
+++ b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
@@ -2605,7 +2605,7 @@ Configurable, StateListener<State, VirtualMachine.Event, VirtualMachine> {
     }
 
     protected boolean aggregationExecution(final AggregationControlCommand.Action action, final Network network, final List<DomainRouterVO> routers)
-            throws AgentUnavailableException {
+            throws AgentUnavailableException, ResourceUnavailableException {
         for (final DomainRouterVO router : routers) {
             final AggregationControlCommand cmd = new AggregationControlCommand(action, router.getInstanceName(), getRouterControlIp(router.getId()), getRouterIpInNetwork(
                     network.getId(), router.getId()));
@@ -2618,12 +2618,12 @@ Configurable, StateListener<State, VirtualMachine.Event, VirtualMachine> {
     }
 
     @Override
-    public boolean prepareAggregatedExecution(final Network network, final List<DomainRouterVO> routers) throws AgentUnavailableException {
+    public boolean prepareAggregatedExecution(final Network network, final List<DomainRouterVO> routers) throws AgentUnavailableException, ResourceUnavailableException {
         return aggregationExecution(Action.Start, network, routers);
     }
 
     @Override
-    public boolean completeAggregatedExecution(final Network network, final List<DomainRouterVO> routers) throws AgentUnavailableException {
+    public boolean completeAggregatedExecution(final Network network, final List<DomainRouterVO> routers) throws AgentUnavailableException, ResourceUnavailableException {
         return aggregationExecution(Action.Finish, network, routers);
     }
 }
diff --git a/server/test/com/cloud/network/router/NetworkHelperImplTest.java b/server/test/com/cloud/network/router/NetworkHelperImplTest.java
index 74a0a60215a..952818d7aea 100644
--- a/server/test/com/cloud/network/router/NetworkHelperImplTest.java
+++ b/server/test/com/cloud/network/router/NetworkHelperImplTest.java
@@ -38,7 +38,7 @@ import com.cloud.agent.api.Command;
 import com.cloud.agent.manager.Commands;
 import com.cloud.exception.AgentUnavailableException;
 import com.cloud.exception.OperationTimedoutException;
-import com.cloud.utils.exception.CloudRuntimeException;
+import com.cloud.exception.ResourceUnavailableException;
 
 
 @RunWith(MockitoJUnitRunner.class)
@@ -52,9 +52,9 @@ public class NetworkHelperImplTest {
     @InjectMocks
     protected NetworkHelperImpl nwHelper = new NetworkHelperImpl();
 
-    @Test(expected=CloudRuntimeException.class)
+    @Test(expected=ResourceUnavailableException.class)
     public void testSendCommandsToRouterWrongRouterVersion()
-            throws AgentUnavailableException, OperationTimedoutException {
+            throws AgentUnavailableException, OperationTimedoutException, ResourceUnavailableException {
         // Prepare
         NetworkHelperImpl nwHelperUT = spy(this.nwHelper);
         VirtualRouter vr = mock(VirtualRouter.class);
@@ -69,7 +69,7 @@ public class NetworkHelperImplTest {
 
     @Test
     public void testSendCommandsToRouter()
-            throws AgentUnavailableException, OperationTimedoutException {
+            throws AgentUnavailableException, OperationTimedoutException, ResourceUnavailableException {
         // Prepare
         NetworkHelperImpl nwHelperUT = spy(this.nwHelper);
         VirtualRouter vr = mock(VirtualRouter.class);
@@ -107,7 +107,7 @@ public class NetworkHelperImplTest {
      */
     @Test
     public void testSendCommandsToRouterWithTrueResult()
-            throws AgentUnavailableException, OperationTimedoutException {
+            throws AgentUnavailableException, OperationTimedoutException, ResourceUnavailableException {
         // Prepare
         NetworkHelperImpl nwHelperUT = spy(this.nwHelper);
         VirtualRouter vr = mock(VirtualRouter.class);
@@ -145,7 +145,7 @@ public class NetworkHelperImplTest {
      */
     @Test
     public void testSendCommandsToRouterWithNoAnswers()
-            throws AgentUnavailableException, OperationTimedoutException {
+            throws AgentUnavailableException, OperationTimedoutException, ResourceUnavailableException {
         // Prepare
         NetworkHelperImpl nwHelperUT = spy(this.nwHelper);
         VirtualRouter vr = mock(VirtualRouter.class);