VCP-VCF Administrator 2024 Question 338
Single answerAn administrator is troubleshooting a network connectivity issue on a vSphere Distributed Switch (vDS). A virtual machine attached to the vDS is unable to communicate with other devices in the same VLAN. The administrator verifies that the physical NICs on the ESXi host are functional and the VLAN configuration on the upstream physical switch is correct. What should the administrator check next to resolve the issue?
- A
Verify that the port group on the vSphere Distributed Switch has the correct VLAN ID configured.
- B
Ensure that the virtual machine's network adapter is set to 'Flexible' instead of 'VMXNET3'.
- C
Check if the uplink port on the vSphere Distributed Switch is active and assigned to an active physical NIC.
- D
Confirm that the ESXi host’s VMkernel adapter is configured with the same IP subnet as the virtual machine.
Show answer and explanation
Correct answer: A
Explanation
The correct VLAN ID configuration on the port group is critical for virtual machine communication within the same VLAN. Misconfigured VLAN IDs are a frequent cause of connectivity issues on a vSphere Distributed Switch. Therefore, the administrator should verify this setting before investigating other potential causes.
- A. Correct.
If the VLAN ID on the port group is incorrect, the virtual machine will not be able to communicate properly with other devices in the same VLAN. This is a common misconfiguration to check.
- B. Incorrect.
The type of network adapter (e.g., VMXNET3) used by the virtual machine does not affect connectivity in this context. VMXNET3 is the preferred adapter and should not be changed to 'Flexible'.
- C. Incorrect.
While it’s important to check the status of uplink ports, the administrator has already confirmed that the physical NICs are functional. This option is less relevant to the scenario described.
- D. Incorrect.
The VMkernel adapter is used for host management and services like vMotion or storage traffic, not for virtual machine communication. The virtual machine's subnet configuration is unrelated to the VMkernel adapter.