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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Issue when creating segments / networks on NSX","articleBody":"Hello everyone,\n\nI have a lab with a vCenter / NSX and i am trying to add Cloudstack ontop. I have followed the docs to configure vCenter with NSX and the vCenter cluster has been added to Cloudstack successfully.\n\nCloudstack version: 4.21.0.0\nNSX Version: 4.2.0.1.0.24210154\nvCenter Version: 8.0.3\n\nBut when i try to create an isolated network the call fails with error:\n\nunable to create NSX network ad00c442-6a64-4772-ab94-43141cc98337 due to: Failed API call to NSX controller\n\nThe strange thing is that in NSX the T1 Gateway is being created\n\nHere are the logs from Cloudstack:\n\n2025-10-27 07:10:55,010 DEBUG [o.a.c.s.NsxApiClient] (DirectAgent-22:[ctx-c6ddeea7]) (logid:ea3ad574) NSX Tier-1 gateway with name: D1-A2-Z1-N224 not found\n2025-10-27 07:10:55,195 ERROR [o.a.c.s.NsxApiClient] (DirectAgent-161:[ctx-385a40c3]) (logid:ea3ad574) Error creating segment D1-A2-Z1-S224: General error has occurred.\n2025-10-27 07:10:55,195 ERROR [o.a.c.r.NsxResource] (DirectAgent-161:[ctx-385a40c3]) (logid:ea3ad574) Failed to create network: adf\n2025-10-27 07:10:55,195 ERROR [o.a.c.u.NsxControllerUtils] (qtp1245065720-24:[ctx-d382e352, ctx-25d4fd50]) (logid:ea3ad574) NSX API Command failed\n2025-10-27 07:10:55,219 ERROR [c.c.a.ApiServer] (qtp1245065720-24:[ctx-d382e352, ctx-25d4fd50]) (logid:ea3ad574) unhandled exception executing api command: [Ljava.lang.String;@2edc4927 com.cloud.utils.exception.CloudRuntimeException: unable to create NSX network 2b833a44-68a5-4d63-b449-8129c4074289due to: Failed API call to NSX controller\n\tat org.apache.cloudstack.service.NsxGuestNetworkGuru.setup(NsxGuestNetworkGuru.java:153)\n\tat org.apache.cloudstack.engine.orchestration.NetworkOrchestrator.setupNetwork(NetworkOrchestrator.java:838)\n\tat org.apache.cloudstack.engine.orchestration.NetworkOrchestrator$11.doInTransaction(NetworkOrchestrator.java:3098)\n\tat org.apache.cloudstack.engine.orchestration.NetworkOrchestrator$11.doInTransaction(NetworkOrchestrator.java:2995)\n\tat com.cloud.utils.db.Transaction$2.doInTransaction(Transaction.java:48)\n\tat com.cloud.utils.db.Transaction.execute(Transaction.java:38)\n\tat com.cloud.utils.db.Transaction.execute(Transaction.java:45)\n\tat org.apache.cloudstack.engine.orchestration.NetworkOrchestrator.createGuestNetwork(NetworkOrchestrator.java:2995)\n\tat org.apache.cloudstack.engine.orchestration.NetworkOrchestrator.createGuestNetwork(NetworkOrchestrator.java:2734)\n\tat com.cloud.network.NetworkServiceImpl$4.doInTransaction(NetworkServiceImpl.java:2332)\n\tat com.cloud.network.NetworkServiceImpl$4.doInTransaction(NetworkServiceImpl.java:2270)\n\tat com.cloud.utils.db.Transaction.execute(Transaction.java:38)\n\tat com.cloud.network.NetworkServiceImpl.commitNetwork(NetworkServiceImpl.java:2270)\n\tat com.cloud.network.NetworkServiceImpl.createGuestNetwork(NetworkServiceImpl.java:1830)\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)\n\tat java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:569)\n\tat org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)\n\tat org.apache.cloudstack.network.contrail.management.EventUtils$EventInterceptor.invoke(EventUtils.java:109)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)\n\tat com.cloud.event.ActionEventInterceptor.invoke(ActionEventInterceptor.java:52)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)\n\tat org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)\n\tat org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)\n\tat jdk.proxy3/jdk.proxy3.$Proxy200.createGuestNetwork(Unknown Source)\n\tat org.apache.cloudstack.api.command.user.network.CreateNetworkCmd.execute(CreateNetworkCmd.java:431)\n\tat com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:173)\n\tat com.cloud.api.ApiServer.queueCommand(ApiServer.java:854)\n\tat com.cloud.api.ApiServer.handleRequest(ApiServer.java:668)\n\tat com.cloud.api.ApiServlet.processRequestInContext(ApiServlet.java:416)\n\tat com.cloud.api.ApiServlet$1.run(ApiServlet.java:193)\n\tat org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)\n\tat org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)\n\tat org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)\n\tat com.cloud.api.ApiServlet.processRequest(ApiServlet.java:190)\n\tat com.cloud.api.ApiServlet.doPost(ApiServlet.java:149)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:665)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:750)\n\tat org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1450)\n\tat org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:554)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)\n\tat org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:772)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:516)\n\tat org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)\n\tat org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)\n\tat org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)\n\tat org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)\n\tat org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)\n\tat org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)\n\tat java.base/java.lang.Thread.run(Thread.java:840)\n\nI have also tried to create a VPC which works ok and i can ping the public IP address it allocates but when i try to create a network inside the VPC it fails again with the same error.\n\nSo my guess is that there is something going on when Cloudstack tries to create a segment on NSX.\n\nIs this a bug or have i forgotten to configure something?","author":{"url":"https://github.com/grehenl","@type":"Person","name":"grehenl"},"datePublished":"2025-10-27T07:19:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/11913/cloudstack/issues/11913"}