2V0-41.24 Question 73
Single answerAn administrator is troubleshooting a logical switching issue in an NSX environment. During the investigation, the administrator discovers that the VMs on different ESXi hosts within the same logical switch cannot communicate. The data plane is functioning correctly, but the administrator suspects a control plane issue. What is the primary role of the control plane in logical switching, and which component is likely responsible for the issue?
- A
The control plane is responsible for forwarding packets between VMs and is likely impacted by a vSphere Distributed Switch misconfiguration.
- B
The control plane is responsible for managing MAC address tables and ARP entries, which are distributed by the NSX Manager.
- C
The control plane is responsible for distributing logical switch information to ESXi hosts and is likely affected by an issue with the NSX Controller.
- D
The control plane is responsible for encrypting and securing communication between VMs and is likely affected by a misconfigured firewall rule.
Show answer and explanation
Correct answer: C
Explanation
The control plane in NSX logical switching is responsible for managing and distributing network state information, such as MAC address tables and ARP entries, to ESXi hosts. This ensures that the data plane can execute packet forwarding correctly. The NSX Controller plays a key role in this process, and any issues with the controller can prevent proper communication between VMs on different hosts within the same logical switch.
- A. Incorrect.
This is incorrect because forwarding packets between VMs is the responsibility of the data plane, not the control plane.
- B. Incorrect.
This is incorrect because MAC address table and ARP entry management is not directly handled by the NSX Manager; the NSX Controller is responsible for distributing this information.
- C. Correct.
This is correct because the control plane in logical switching is primarily responsible for distributing logical switch information, such as MAC address tables and ARP entries, to ESXi hosts. The NSX Controller handles these functions, and an issue with it could disrupt VM communication.
- D. Incorrect.
This is incorrect because encrypting and securing communication is not a primary function of the control plane. Firewalls play a role in security, but they are not related to the described issue.