VCP-VMC 2024 Question 199
Single answerA cloud administrator is troubleshooting connectivity issues between two virtual machines (VMs) in a VMware Cloud on AWS environment. Both VMs are in the same subnet but cannot communicate with each other. The administrator has verified that the VMs are powered on, the network adapters are connected, and the correct CIDR block is in place. What is the most likely cause of the issue?
- A
The Distributed Firewall (DFW) rules are blocking the traffic between the VMs.
- B
The Elastic Network Interface (ENI) on the host is misconfigured.
- C
The route table for the subnet does not have a default route to the Internet gateway.
- D
The VMs are located on different hosts and there is no vMotion network configured.
Show answer and explanation
Correct answer: A
Explanation
In VMware Cloud on AWS environments, the VMware Distributed Firewall (DFW) is often used to control traffic between VMs. Even if VMs are on the same subnet, specific DFW rules could block their communication. The other options are unrelated to the direct intra-subnet connectivity issue described in the scenario.
- A. Correct.
The Distributed Firewall (DFW) could be blocking the traffic since it operates at the virtual machine level and could prevent communication even within the same subnet.
- B. Incorrect.
The Elastic Network Interface (ENI) is used for communication between the VMware Cloud on AWS environment and the AWS infrastructure but does not impact VM-to-VM communication within the same subnet.
- C. Incorrect.
A missing route to the Internet gateway would only affect traffic to external networks, not communication between VMs in the same subnet.
- D. Incorrect.
The vMotion network is used for live migration of VMs between hosts and does not influence intra-subnet communication between VMs.