Add Host task on SDDC fails with "ADD_HOST operation validation failed due to: Entity:<host_fqdn> with failed check: ESXi virtual nic traffic type checkwith severity CRITICAL"

Products

• VMware SDDC Manager

Issue/Introduction

Add host task fails on "Perform set of validations for current workflow" task with the following: 

 

/var/log/vmware/vcf/domainmanager/domainmanager.log shows: 

2025-04-OST15:36:23.941+0000 DEBUG [vcf_dm, 67f14ca6bc475a987bele95b08777af6,e03b]
entityName: <host_fqdn> 
entityType: host
description: Check if more than one virtual nic exists for a traffic type
resultMessage: Host: <host_fqdn> has more than one virtual nic assigned to traffic type: vmotion or is sharing a port group with another traffic type.
severity: CRITICAL
status: VALIDATION FAILED
remediation: Ensure each virtual nic is uniquely assigned to a specific traffic type and is not sharing a port group with another traffic type.
name: ESXi virtual nic traffic type check

2025-04-05T15:36:23.941+0000 ERROR [vcf_dm, 67f14ca6bc475a987bele95b08777af6, e03b] [c.v.v.a.s.AssesamentLambdaServiceClient, dm-exec-12]
Critical check VALIDATION FAILED : Check if more than one virtual nic exists for a traffic type
....
2025-04-05T15:36:23.943+0000 ERROR [vcf_dm, 67f14ca6bc475a987bele95b08777af6, e03b] [c.v.e.5.c. 5.a.DayNGuardrailaValidationAction, dm-exec-12] Failed to run ADD_HOST validations due to error: ADD HOST operation validation failed due to: Entity: <host_fqdn> with failed check: ESXi virtual nic traffic type checkwith severity CRITICAL

Environment

VMware Cloud Foundation 5.x 

Resolution

1. Login to the vSphere UI and navigate to the host in question. 

2. Check the vmkernel adapters page (Host > Configure > VMkernel Adapters)  and confirm that there are no nics sharing the same traffic type or sharing the same portgroup with another traffic type. 

3. If there are nics sharing the same traffic type (even the network label needs to be for different traffic types), remove the vmk adapter and re-create with the proper configuration to match the rest of the existing hosts in the cluster.