VM Migration Failed. CloudStack 4.22.1.0+XCP-NG 8.2.1

[sptest232]

problem

Please help me figure out the reason for the virtual machine migration error.

The VM is started and it's connected to L2 network. When I try to migrate the VM to the another host of the pool I get an error "Unable to support this type of network broadcast domain: null". The same situation with some other VMs wich are connected to a VPC network.
At the same time, some other VMs of the same pool connected to other L2 networks migrate without problems.

VM configuration:
{
"count": 1,
"virtualmachine": [
{
"account": "test",
"affinitygroup": [],
"arch": "x86_64",
"cpunumber": 8,
"cpuspeed": 1000,
"cpuused": "0.43%",
"created": "2026-07-16T10:41:24+0300",
"deleteprotection": false,
"details": {
"Message.ReservedCapacityFreed.Flag": "false",
"cpuNumber": "8",
"cpuOvercommitRatio": "4",
"hypervisortoolsversion": "xenserver56",
"memory": "12288",
"memoryOvercommitRatio": "2",
"platform": "device-model:qemu-upstream-compat;apic:true;viridian:true;timeoffset:0;cores-per-socket:1;pae:true;acpi:1;hpet:true;secureboot:false;nx:true",
"rootdisksize": "40"
},
"diskioread": 0,
"diskiowrite": 0,
"diskkbsread": 66,
"diskkbswrite": 485,
"diskofferingid": "57bf8694-722b-4b72-939d-f8367aeb95a3",
"diskofferingname": "test",
"displayname": "test-vm",
"displayvm": true,
"domain": "test",
"domainid": "9cfeffa6-7064-4f6d-9e87-71da84db99b0",
"domainpath": "ROOT/test",
"guestosid": "3610579a-4224-11ec-8697-62c4e64309fe",
"haenable": true,
"hasannotations": false,
"hostcontrolstate": "Enabled",
"hostid": "c7722e69-1320-44f7-8dd9-da7f64a50fa2",
"hostname": "xcp-test",
"hypervisor": "XenServer",
"id": "943abbd3-0fe1-4a8d-9103-b720df48c31b",
"instancename": "i-222-2222-VM",
"isdynamicallyscalable": false,
"lastupdated": "2026-07-22T11:25:37+0300",
"memory": 12288,
"memoryintfreekbs": 6191235,
"memorykbs": 12582912,
"memorytargetkbs": 0,
"name": "test",
"networkkbsread": 24,
"networkkbswrite": 0,
"nic": [
{
"deviceid": "0",
"extradhcpoption": [],
"id": "413f962f-8c50-4960-be13-06f386740d39",
"isdefault": true,
"macaddress": "02:07:07:72:00:15",
"networkid": "f004cc1c-dbc7-46e2-b68f-f94486f79580",
"networkname": "test-net",
"secondaryip": [],
"traffictype": "Guest",
"type": "L2"
}
],
"osdisplayname": "Other Linux (64-bit)",
"ostypeid": "3610579a-4224-11ec-8697-62c4e64309fe",
"passwordenabled": false,
"pooltype": "PreSetup",
"receivedbytes": 0,
"rootdeviceid": 0,
"rootdevicetype": "ROOT",
"securitygroup": [],
"sentbytes": 0,
"serviceofferingid": "d7b6331a-6647-4194-9700-bac19cc6989e",
"serviceofferingname": "test",
"state": "Running",
"tags": [],
"templatedisplaytext": "test",
"templateformat": "ISO",
"templateid": "86f7dd7b-300e-45bd-8309-c79598dc6cfd",
"templatename": "Test",
"templatetype": "USER",
"userid": "7aac7740-5899-4af0-a1eb-f2fd1e1d8dc3",
"username": "test",
"zoneid": "9505445a-7164-4675-876d-1a2fee1f7e46",
"zonename": "test-zone"
}
]
}

Network configuration:

{
"count": 1,
"network": [
{
"account": "test",
"acltype": "Account",
"broadcastdomaintype": "Vlan",
"broadcasturi": "vlan://1234",
"canusefordeploy": true,
"created": "2026-05-14T14:22:10+0300",
"details": {
"hideIpAddressUsage": "false"
},
"displaynetwork": true,
"displaytext": "test-net",
"dns1": "1.1.1.1",
"dns2": "8.8.8.8",
"domain": "test",
"domainid": "9cfeffa6-7064-4f6d-9e87-71da84db99b0",
"domainpath": "ROOT/test",
"hasannotations": false,
"id": "f004cc1c-dbc7-46e2-b68f-f94486f79580",
"ispersistent": false,
"issystem": false,
"name": "test-net",
"networkofferingavailability": "Optional",
"networkofferingconservemode": true,
"networkofferingdisplaytext": "test-net L2",
"networkofferingid": "55634a31-3d5f-45ad-84dc-093ff55db8b9",
"networkofferingname": "test-net L2",
"physicalnetworkid": "636227a2-081e-4494-bd93-6adeea0e768a",
"privatemtu": 1500,
"publicmtu": 1500,
"receivedbytes": 0,
"redundantrouter": false,
"related": "f004cc1c-dbc7-46e2-b68f-f94486f79580",
"restartrequired": false,
"sentbytes": 0,
"service": [],
"specifyipranges": false,
"specifyvlan": true,
"state": "Setup",
"strechedl2subnet": false,
"supportsvmautoscaling": false,
"tags": [],
"traffictype": "Guest",
"type": "L2",
"vlan": "1234",
"zoneid": "9505445a-7164-4675-876d-1a2fee1f7e46",
"zonename": "test-zone"
}
]
}

Here is the ACS's log:

2026-07-24 12:39:25,033 DEBUG [c.c.a.t.Request] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Seq 77361-801359258695256835: Executing: { Cmd , MgmtId: 108597816265214, via: 77361(xcp-test), Ver: v1, Flags: 100111, [{"com.cloud.agent.api.PrepareForMigrationCommand":{"vm":{"id":"9679","name":"i-222-2222-VM","bootloader":"PyGrub","state":"Running","type":"User","cpus":"8","minSpeed":"700","maxSpeed":"1000","minRam":"(6.00 GB) 6442450944","maxRam":"(12.00 GB) 12884901888","arch":"x86_64","os":"Other Linux (64-bit)","platformEmulator":"Other install media","bootArgs":"","enableHA":"true","limitCpuUse":"false","enableDynamicallyScaleVm":"false","details":{"cpuNumber":"8","memory":"12288","memoryOvercommitRatio":"2","Message.ReservedCapacityFreed.Flag":"false","hypervisortoolsversion":"xenserver56","cpuOvercommitRatio":"4","rootdisksize":"40","platform":"device-model:qemu-upstream-compat;apic:true;viridian:true;timeoffset:0;cores-per-socket:1;pae:true;acpi:1;hpet:true;secureboot:false;nx:true"},"uuid":"943abbd3-0fe1-4a8d-9103-b720df48c31b","enterHardwareSetup":"false","disks":[{"data":{"org.apache.cloudstack.storage.to.VolumeObjectTO":{"uuid":"7db3b617-de76-47c4-806f-4f480dec55af","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"test","name":"test","id":"84","poolType":"PreSetup","host":"localhost","path":"/test","port":"0","url":"PreSetup://localhost/test/?ROLE=Primary&STOREUUID=test","isManaged":"false"}},"name":"ROOT-2222","size":"(40.00 GB) 42949672960","path":"22472c93-e335-4136-ad67-d7bc5eb18434","volumeId":"11120","vmName":"i-222-2222-VM","accountId":"222","format":"VHD","provisioningType":"THIN","poolId":"84","id":"11120","deviceId":"0","bytesReadRate":"(0 bytes) 0","bytesWriteRate":"(0 bytes) 0","iopsReadRate":"(0 bytes) 0","iopsWriteRate":"(0 bytes) 0","cacheMode":"NONE","hypervisorType":"XenServer","directDownload":"false","deployAsIs":"false","checkpointPaths":[],"checkpointImageStoreUrls":[],"followRedirects":"true"}},"diskSeq":"0","path":"22472c93-e335-4136-ad67-d7bc5eb18434","type":"ROOT","details":{"storageHost":"localhost","managed":"false","storagePort":"0","protocoltype":"PreSetup","storage.pool.disk.wait":"60","volumeSize":"(40.00 GB) 42949672960"}},{"data":{"org.apache.cloudstack.storage.to.TemplateObjectTO":{"id":"0","format":"ISO","accountId":"0","hvm":"false","bootable":"false","directDownload":"false","deployAsIs":"false","followRedirects":"false"}},"diskSeq":"3","type":"ISO"}],"nics":[{"deviceId":"0","networkRateMbps":"10000","defaultNic":"true","pxeDisable":"false","nicUuid":"413f962f-8c50-4960-be13-06f386740d39","details":{"PromiscuousMode":"false","ForgedTransmits":"true","MacLearning":"false","MacAddressChanges":"true"},"dpdkEnabled":"false","networkId":"1906","networkSegmentName":"D124-A229-Z7-S1906","uuid":"f004cc1c-dbc7-46e2-b68f-f94486f79580","mac":"02:07:07:72:00:15","dns1":"1.1.1.1","dns2":"8.8.8.8","broadcastType":"Vlan","type":"Guest","securityGroupEnabled":"false","name":"test"}],"vcpuMaxLimit":"32","configDriveLabel":"config-2","configDriveLocation":"SECONDARY","guestOsDetails":{},"extraConfig":{},"networkIdToNetworkNameMap":{"1906":"D124-A229-Z7-S1906"}},"rollback":"false","wait":"0","bypassHostMaintenance":"false"}}] }

2026-07-24 12:39:25,043 WARN [c.c.h.x.r.w.x.CitrixPrepareForMigrationCommandWrapper] (DirectAgent-188:[ctx-df8d7551]) (logid:cf26e16a) Catch Exception com.cloud.utils.exception.CloudRuntimeException prepare for migration failed due to com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getNetwork(CitrixResourceBase.java:2894)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:60)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:35)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixRequestWrapper.execute(CitrixRequestWrapper.java:122)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.executeRequest(CitrixResourceBase.java:1779)
at com.cloud.agent.manager.DirectAgentAttache$Task.runInContext(DirectAgentAttache.java:306)
at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

2026-07-24 12:39:25,043 DEBUG [c.c.a.m.D.Task] (DirectAgent-188:[ctx-df8d7551]) (logid:cf26e16a) Seq 77354-801359258695256835: Response Received:
2026-07-24 12:39:25,044 DEBUG [c.c.a.t.Request] (DirectAgent-188:[ctx-df8d7551]) (logid:cf26e16a) Seq 77361-801359258695256835: Processing: { Ans: , MgmtId: 108597816265214, via: 77361(xcp-test
l), Ver: v1, Flags: 110, [{"com.cloud.agent.api.PrepareForMigrationAnswer":{"dpdkInterfaceMapping":{},"result":"false","details":"Exception: com.cloud.utils.exception.CloudRuntimeException
Message: Unable to support this type of network broadcast domain: null
Stack: com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getNetwork(CitrixResourceBase.java:2894)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:60)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:35)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixRequestWrapper.execute(CitrixRequestWrapper.java:122)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.executeRequest(CitrixResourceBase.java:1779)
at com.cloud.agent.manager.DirectAgentAttache$Task.runInContext(DirectAgentAttache.java:306)
at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
","wait":"0","bypassHostMaintenance":"false"}}] }
2026-07-24 12:39:25,044 DEBUG [c.c.a.m.ClusteredDirectAgentAttache] (DirectAgent-188:[ctx-df8d7551]) (logid:cf26e16a) Seq 77354-801359258695256835: No more commands found
2026-07-24 12:39:25,044 DEBUG [c.c.a.t.Request] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Seq 77361-801359258695256835: Received: { Ans: , MgmtId: 1085978162652
14, via: 77361(xcp-test), Ver: v1, Flags: 110, { PrepareForMigrationAnswer } }
2026-07-24 12:39:25,044 ERROR [c.c.v.ClusteredVirtualMachineManagerImpl] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Failed to prepare destination host 77361 for m
igration of VM i-222-2222-VM : Exception: com.cloud.utils.exception.CloudRuntimeException
Message: Unable to support this type of network broadcast domain: null
Stack: com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getNetwork(CitrixResourceBase.java:2894)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:60)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:35)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixRequestWrapper.execute(CitrixRequestWrapper.java:122)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.executeRequest(CitrixResourceBase.java:1779)
at com.cloud.agent.manager.DirectAgentAttache$Task.runInContext(DirectAgentAttache.java:306)
at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

2026-07-24 12:39:25,045 DEBUG [c.c.v.UserVmManagerImpl] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Skipping PVLAN setup on host 77353 for NIC NicProfile {"broadca
stUri":null,"deviceId":0,"iPv4Address":null,"id":14523,"reservationId":"a0591da5-b287-4749-a8fb-4aab81035be3","uuid":"413f962f-8c50-4960-be13-06f386740d39","vmId":9679} because broadcast URI is null

2026-07-24 12:39:25,056 ERROR [c.c.v.VmWorkJobHandlerProxy] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Invocation exception, caused by: com.cloud.exception.AgentU
navailableException: Resource [Host:77361] is unreachable: Host 77361: Unable to prepare for migration due to Exception: com.cloud.utils.exception.CloudRuntimeException
Message: Unable to support this type of network broadcast domain: null
Stack: com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getNetwork(CitrixResourceBase.java:2894)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:60)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:35)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixRequestWrapper.execute(CitrixRequestWrapper.java:122)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.executeRequest(CitrixResourceBase.java:1779)
at com.cloud.agent.manager.DirectAgentAttache$Task.runInContext(DirectAgentAttache.java:306)
at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

2026-07-24 12:39:25,056 INFO [c.c.v.VmWorkJobHandlerProxy] (Work-Job-Executor-133:[ctx-71b90daf, job-155111/job-155112, ctx-dbc25316]) (logid:cf26e16a) Rethrow exception com.cloud.exception.AgentUnavailableExcep
tion: Resource [Host:77361] is unreachable: Host 77361: Unable to prepare for migration due to Exception: com.cloud.utils.exception.CloudRuntimeException
Message: Unable to support this type of network broadcast domain: null
Stack: com.cloud.utils.exception.CloudRuntimeException: Unable to support this type of network broadcast domain: null
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.getNetwork(CitrixResourceBase.java:2894)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:60)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixPrepareForMigrationCommandWrapper.execute(CitrixPrepareForMigrationCommandWrapper.java:35)
at com.cloud.hypervisor.xenserver.resource.wrapper.xenbase.CitrixRequestWrapper.execute(CitrixRequestWrapper.java:122)
at com.cloud.hypervisor.xenserver.resource.CitrixResourceBase.executeRequest(CitrixResourceBase.java:1779)
at com.cloud.agent.manager.DirectAgentAttache$Task.runInContext(DirectAgentAttache.java:306)
at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

versions

CloudStack 4.22.1.0+XCP-NG 8.2.1

The steps to reproduce the bug

1. Create L2-network with some vlan-id;
2. Connect a VM to L2-network;
3. Statr the VM
4. Migrate the VM to another pool's host

What to do about it?

No response

[DaanHoogland]

ah, this is the same as #13691. It may make more sense as a Q&A discussion item until we have root cause and can produce a fix. I am not sure if cross-pool migration is supposed to be supported.

[sptest232]

the error occurs when migrating VMs within the same pool

[DaanHoogland]

my mistake, I misread

the error occurs when migrating VMs within the same pool

What versions are you using (mainly cloudstack itself)?
there was a related fix in 4.28.2: #8204

It seems the nic of the VM is missing a broadcast URL, which should be vlan://1234 in your case. No idea why it isn’t there and if it got removed, but you can try adding it to the nic record.

[sptest232]

How can I add the broadcast URL to the nic record?

[DaanHoogland]

there is a column named ‘broadcast_uri’ in the ‘nics’ table.

[sptest232]

Tell me please should i also add 'vlan://1234' to 'isolation_uri' (right now it's also 'NULL')?

[weizhouapache]

@sptest232
you can update both. in my env, broadcast_uri and isolation_uri are always the same.

[sptest232]

Thanks so much!
Before the changes, in the nics table for this VM, the broadcast_uri and isolation_uri values were both set to 'NULL'.
After I added 'vlan://1234' for both of them, the VM migrated without a hitch.

[DaanHoogland]

great @sptest232 , let’s hope it doesn’t happen again and/or you find the root cause of why they where set to null in the first place, so we can fix.