XCP-NG MGMT Network with VLAN

### problem

Can't add a host with the management network on VLAN.
`2026-03-01 18:22:35,895 DEBUG [c.c.a.ApiServlet] (qtp1438988851-319:[ctx-42e149e5]) (logid:326107e1) ===START=== 172.20.20.254 -- POST addHost
2026-03-01 18:22:35,895 DEBUG [c.c.a.ApiServlet] (qtp1438988851-319:[ctx-42e149e5]) (logid:326107e1) Two factor authentication is already verified for the user 2, so skipping
2026-03-01 18:22:35,898 DEBUG [c.c.a.ApiServer] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) CIDRs from which account 'Account [{"accountName":"admin","id":2,"uuid":"54e527f0-1594-11f1-a918-2e4d08b68745"}]' is allowed to perform API calls: 0.0.0.0/0,::/0
2026-03-01 18:22:35,899 INFO [o.a.c.a.DynamicRoleBasedAPIAccessChecker] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Account for user id 54e58bbc-1594-11f1-a918-2e4d08b68745 is Root Admin or Domain Admin, all APIs are allowed.
2026-03-01 18:22:35,899 DEBUG [o.a.c.a.StaticRoleBasedAPIAccessChecker] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) RoleService is enabled. We will use it instead of StaticRoleBasedAPIAccessChecker.
2026-03-01 18:22:35,899 DEBUG [o.a.c.r.ApiRateLimitServiceImpl] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) API rate limiting is disabled. We will not use ApiRateLimitService.
2026-03-01 18:22:35,900 WARN [c.c.a.d.ParamGenericValidationWorker] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Received unknown parameters for command addHost. Unknown parameters : clustertype
2026-03-01 18:22:35,903 INFO [c.c.r.ResourceManagerImpl] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Trying to add a new host at http://172.20.20.4 in data center Zone {"id": "1", "name": "zone1", "uuid": "54d03c09-3daf-41b0-ad29-ae947a307201"}
2026-03-01 18:22:35,930 DEBUG [c.c.h.x.d.XcpServerDiscoverer] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) host 172.20.20.4 doesn't have 996dd2e7-ad95-49cc-a0be-2c9adc4dfb0b Hotfix
2026-03-01 18:22:35,934 DEBUG [c.c.h.x.d.XcpServerDiscoverer] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) host 172.20.20.4 doesn't have 0850b186-4d47-11e3-a720-001b2151a503 Hotfix
2026-03-01 18:22:35,936 INFO [c.c.h.x.d.XcpServerDiscoverer] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Found host xcp-ng-04 ip=172.20.20.4 product version=8.3.0
2026-03-01 18:22:35,939 DEBUG [c.c.n.NetworkModelImpl] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Failed to retrieve the default label for storage traffic: zone: Zone {"id": "1", "name": "zone1", "uuid": "54d03c09-3daf-41b0-ad29-ae947a307201"} hypervisor: XenServer due to: Unable to find the default physical network with traffic=Storage in the specified zone id
2026-03-01 18:22:35,964 DEBUG [c.c.a.r.v.VirtualRoutingResource] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) The router.aggregation.command.each.timeout in seconds is set to 600
2026-03-01 18:22:36,054 WARN [c.c.h.x.r.XcpServer83Resource] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Unsupported configuration. Management network is on a VLAN. host=18eae8ff-c756-4a81-a0d8-c8d9a6090257; pif=5f1a486e-27fe-7086-7064-1820b9e1990e; vlan=20
2026-03-01 18:22:36,054 WARN [c.c.h.x.r.XcpServer83Resource] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Unable to get host information for 172.20.20.4 com.cloud.utils.exception.CloudRuntimeException: Unsupported configuration. Management network is on a VLAN. host=18eae8ff-c756-4a81-a0d8-c8d9a6090257; pif=5f1a486e-27fe-7086-7064-1820b9e1990e; vlan=20
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getManagementNetwork(CitrixResourceBase.java:2791)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getHostInfo(CitrixResourceBase.java:2224)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.initialize(CitrixResourceBase.java:3703)
at com.cloud.hypervisor.xenserver.resource.XenServer56Resource.initialize(XenServer56Resource.java:137)
at org.apache.cloudstack.hypervisor.xenserver.XenServerResourceNewBase.initialize(XenServerResourceNewBase.java:72)
at com.cloud.resource.ResourceManagerImpl.createHostAndAgent(ResourceManagerImpl.java:3429)
at com.cloud.resource.ResourceManagerImpl.createHostAndAgent(ResourceManagerImpl.java:3419)
at com.cloud.resource.ResourceManagerImpl.discoverHostsFull(ResourceManagerImpl.java:943)
at com.cloud.resource.ResourceManagerImpl.discoverHosts(ResourceManagerImpl.java:720)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
at jdk.proxy3/jdk.proxy3.$Proxy234.discoverHosts(Unknown Source)
at org.apache.cloudstack.api.command.admin.host.AddHostCmd.execute(AddHostCmd.java:154)
at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:173)
at com.cloud.api.ApiServer.queueCommand(ApiServer.java:854)
at com.cloud.api.ApiServer.handleRequest(ApiServer.java:668)
at com.cloud.api.ApiServlet.processRequestInContext(ApiServlet.java:416)
at com.cloud.api.ApiServlet$1.run(ApiServlet.java:193)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at com.cloud.api.ApiServlet.processRequest(ApiServlet.java:190)
at com.cloud.api.ApiServlet.doPost(ApiServlet.java:149)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:665)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)
at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1450)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:554)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:772)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:516)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
at java.base/java.lang.Thread.run(Thread.java:840)

2026-03-01 18:22:36,054 WARN [c.c.h.x.r.XcpServer83Resource] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Unable to get host information for 172.20.20.4
2026-03-01 18:22:36,060 INFO [c.c.r.ResourceManagerImpl] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Unable to fully initialize the agent because no StartupCommands are returned
2026-03-01 18:22:36,060 INFO [c.c.r.ResourceManagerImpl] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) server resources successfully discovered by XCP Agent
2026-03-01 18:22:36,060 INFO [c.c.a.ApiServer] (qtp1438988851-319:[ctx-42e149e5, ctx-36fadadb]) (logid:326107e1) Failed to add host`

### versions

4.22

### The steps to reproduce the bug

1.
2.
3.
...

### What to do about it?

_No response_

Start with CitrixResourceBase.java at getManagementNetwork(), then trace getHostInfo() and XcpServer83Resource.initialize() from the reported addHost stack trace. Reproduce host discovery with an XCP-ng management network on VLAN 20 and determine the expected initialization behavior; done means the host can be added successfully instead of failing with the unsupported-configuration error.

Written by the indexing model from the issue text.