VCP-VCF Administrator 2024 Question 332
Select 3An administrator is troubleshooting a network connectivity issue within a vSphere environment. A virtual machine is unable to communicate with other VMs on the same vSphere Distributed Switch (vDS) and the same VLAN. The administrator has verified that the VM is powered on, the correct port group is assigned, and the NIC is connected and functioning. Which of the following steps should the administrator perform to resolve the issue?
- A
Check the VLAN ID configuration on the port group and confirm it matches the physical switch VLAN configuration.
- B
Verify that the physical NICs (uplinks) on the ESXi host are active and properly connected to the physical network.
- C
Ensure that Promiscuous Mode is enabled on the port group assigned to the VM.
- D
Check the security policies on the vDS to ensure there are no blocking rules applied to the VM's MAC address.
- E
Verify that the MTU (Maximum Transmission Unit) setting on the vDS matches the physical network's MTU setting.
Show answer and explanation
Correct answers: A, B, E
Explanation
To troubleshoot network connectivity issues in vSphere, it is important to verify the VLAN configuration, physical NIC connectivity, and MTU settings. These are common points of misconfiguration that can disrupt VM communication. Promiscuous Mode and MAC address blocking are less likely to be the root cause of the issue in this scenario.
- A. Correct.
Checking the VLAN ID is essential because a mismatch between the port group VLAN ID and the physical switch VLAN configuration can cause connectivity issues.
- B. Correct.
Verifying the physical NICs (uplinks) ensures that the ESXi host has proper connectivity to the physical network, which is critical for VM communication.
- C. Incorrect.
Promiscuous Mode is not required for normal VM communication and enabling it unnecessarily can introduce security risks.
- D. Incorrect.
Security policies on the vDS are not typically configured to block specific MAC addresses by default, so this is rarely the cause of connectivity issues.
- E. Correct.
MTU mismatches between the vDS and the physical network can result in packet drops or fragmentation, which can cause connectivity issues.