DVS health check shows VLAN 0 not supported, but VLAN 0 is not configured on any port groups

Products

• VMware vSphere Essentials Plus
• VMware vSphere Foundation
• VMware vSphere Standard

Issue/Introduction

VLAN 0 may show up in a DVS health check even though it is not configured on any DVS port groups or NSX segments.

This occurs when NSX is installed in the environment and overlay networks are used.

Environment

VMware vSphere
VMware NSX-T Data Center

Cause

NSX overlay segments (VNI) are not properly excluded from the VLAN probe in DVS health check as intended.

Resolution

There is currently no fix for this issue.  It will be addressed in a future patch.

Workaround:

• Disable VLAN checks in DVS health check or turn off DVS health check monitoring.