Use vSphere Distributed Switch health check to monitor distributed switch configurations, and identify and resolve network problems.

vSphere Distributed Switch health check helps you identify and troubleshoot configuration problems with the vSphere Distributed Switch (VDS), and mismatched configurations between the VDS and your environment's physical network. By default, health check is turned off. You can enable health check to identify and resolve network problems you might be experiencing. Depending on the options that you select, vSphere Distributed Switch health check can generate a significant number of MAC addresses for testing teaming policy, MTU size, and VLAN configuration. These MAC addresses result in extra network traffic, which can affect network performance.

Important: Use health check to troubleshoot network problems, and then disable it after you identify and resolve the problem. After you disable vSphere Distributed Switch health check, the generated MAC addresses age out of your physical network environment according to your network policy. For more information, see Knowledge Base article KB 2034795.


  1. In the vSphere Web Client, navigate to the distributed switch.
  2. From the Actions menu, select Settings > Edit Health Check.
  3. Use the drop-down menus to enable or disable health check options.
    Option Description
    VLAN and MTU Reports the status of distributed uplink ports and VLAN ranges.
    Teaming and Failover Checks for any configuration mismatch between the ESXi host and the physical switch used in the teaming policy.
  4. Click OK.

What to do next

When you change the configuration of a vSphere Distributed Switch, you can view information about the change in the Monitor tab in the vSphere Web Client. See View vSphere Distributed Switch Health Status.