VCF 9.1 Installer fails on validation with error, "Unable to determine deployment network."

Products

• VMware SDDC Manager / VCF Installer

Issue/Introduction

The following error is observed in the VCF Installer's domainmanager.log

/var/log/vmware/vcf/domainmanager/domainmanager.log 

2026-05-18T17:33:47.463+0000 ERROR [vcf_dm,6a0b4d7ad38d1001fb4a8a5088260c41,f57d] [c.v.e.s.v.v.VspClusterSpecValidator,dm-exec-356]  Error while obtaining VSP deployment network
com.vmware.evo.sddc.orchestrator.exceptions.OrchTaskException: Failed to extract deployment details from vCenter VM with address vcenter.example.com
        at com.vmware.evo.sddc.sddcmanager.helper.ColocatedVcVmDeploymentDataUtil.getVmDeploymentDataFromColocatedVc(ColocatedVcVmDeploymentDataUtil.java:175)
        at com.vmware.evo.sddc.sddcmanager.helper.ColocatedVcVmDeploymentDataUtil.getVmDeploymentDataFromColocatedVc(ColocatedVcVmDeploymentDataUtil.java:62)
        at com.vmware.evo.sddc.validation.validator.VspClusterSpecValidator.getDeploymentNetworkIpv4(VspClusterSpecValidator.java:1114)
        at com.vmware.evo.sddc.validation.validator.VspClusterSpecValidator.validateDayNVspSpec(VspClusterSpecValidator.java:131)
        at com.vmware.evo.sddc.validation.validator.VspClusterSpecValidator.validateSpec(VspClusterSpecValidator.java:92)
        at com.vmware.evo.sddc.validation.validator.SddcValidator.lambda$validate$0(SddcValidator.java:142)
        at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
        at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)
        at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
        at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)
        at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)
        at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)
        at com.vmware.evo.sddc.validation.validator.SddcValidator.validate(SddcValidator.java:144)
        at com.vmware.evo.sddc.validation.action.AuditSddcSpecAction.execute(AuditSddcSpecAction.java:67)
        at com.vmware.evo.sddc.validation.action.AuditSddcSpecAction.execute(AuditSddcSpecAction.java:37)
        at com.vmware.evo.sddc.orchestrator.platform.action.FsmActionState.invoke(FsmActionState.java:66)
        at com.vmware.evo.sddc.orchestrator.platform.action.FsmActionPlugin.invoke(FsmActionPlugin.java:161)
        at com.vmware.evo.sddc.orchestrator.platform.action.FsmActionPlugin.invoke(FsmActionPlugin.java:147)
        at com.vmware.evo.sddc.orchestrator.core.ProcessingTaskSubscriber.invokeMethod(ProcessingTaskSubscriber.java:401)
        at com.vmware.evo.sddc.orchestrator.core.ProcessingTaskSubscriber.processTask(ProcessingTaskSubscriber.java:515)
        at com.vmware.evo.sddc.orchestrator.core.ProcessingTaskSubscriber.accept(ProcessingTaskSubscriber.java:128)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)

Environment

VMware Cloud Foundation 9.1

Cause

VCF 9.x requires that the vCenter be on a vSphere Distributed Switch (VDS)

Supported and Not Supported Configurations to Converge to VCF

Resolution

Follow the steps in Migrating from Standard to Distributed vSwitch. to move the vCenter to a VDS. 

Restart the deployment workflow once the vCenter is on a VDS.