VCP-VCF Administrator 2024 Question 331
Single answerAn administrator is troubleshooting a networking issue in a VMware Cloud Foundation environment. A virtual machine is unable to communicate with other virtual machines on the same VLAN. Upon investigation, the administrator discovers that the virtual machine is connected to a distributed port group. Which step should the administrator take to identify the root cause of the issue?
- A
Verify if the VLAN ID is correctly configured on the distributed port group.
- B
Check the MTU settings on the physical switch and the distributed switch.
- C
Ensure the ESXi host has sufficient CPU and memory resources.
- D
Review the promiscuous mode setting on the distributed port group.
Show answer and explanation
Correct answer: A
Explanation
When troubleshooting inter-VM communication on the same VLAN, verifying the VLAN ID configuration on the distributed port group is a key step. An incorrect VLAN ID can prevent the virtual machines from properly tagging and receiving network traffic, resulting in communication failures.
- A. Correct.
Correct VLAN ID configuration is critical for ensuring proper network communication. If the VLAN ID is incorrectly set, traffic will not be properly tagged, leading to communication failures.
- B. Incorrect.
While MTU mismatches can cause network issues, they typically result in packet fragmentation or dropped packets, not specific VLAN communication failures.
- C. Incorrect.
CPU and memory resources on the ESXi host do not directly impact networking issues related to VLAN communication.
- D. Incorrect.
The promiscuous mode setting is related to allowing or blocking all network traffic on a port, but it does not affect VLAN-specific communication.