Important Note: Validate that each troubleshooting step below is true for your environment. The steps provide instructions or a link to a document, for validating the step and taking corrective action as necessary. The steps are ordered in the most appropriate sequence to isolate the issue and identify the proper resolution. Do not skip a step.
8. Verify that the virtual machine portgroup is configured with the correct VLAN id and check the switchports connected to vmnics allowing that tagged vlan traffic, for reference Sample configuration of virtual switch VLAN tagging (VST Mode) (broadcom.com)
Note: ESXi does not log VM connectivity or communication (outside of port or physical link failures seen at the host level), so it is important to perform the troubleshooting steps in this article during the time you are experiencing the issue to be able to determine the cause.
For more information, see: