2V0-41.24 Question 85
Single answerIn an NSX-T Data Center environment, how is ARP suppression achieved to reduce broadcast traffic within a Logical Switch?
- A
By configuring the Tier-1 gateway to respond to ARP requests on behalf of VMs.
- B
By leveraging the Controller cluster to maintain an ARP table and respond to ARP requests.
- C
By using the ARP Proxy feature in the physical network to handle Layer 2 ARP resolution.
- D
By storing ARP entries in the local NSX-T Logical Switch and responding to ARP requests locally.
Show answer and explanation
Correct answer: D
Explanation
In NSX-T, ARP suppression is achieved by storing ARP entries in the local Logical Switch. When a VM needs to resolve an IP address, the Logical Switch intercepts the ARP request and responds locally with the appropriate MAC address, eliminating the need to broadcast the request across the network. This reduces unnecessary Layer 2 broadcasts and improves network efficiency.
- A. Incorrect.
Incorrect: The Tier-1 gateway is not directly responsible for ARP suppression. Its role is to handle routing and north-south traffic, not ARP requests within the Logical Switch.
- B. Incorrect.
Incorrect: The Controller cluster in NSX-T does not directly respond to ARP requests. It handles control plane functions like managing routing and topology information.
- C. Incorrect.
Incorrect: ARP Proxy is not used in NSX-T for ARP suppression; it is a feature typically found in physical networks and does not apply to Logical Switches.
- D. Correct.
Correct: NSX-T Logical Switches store ARP entries locally using the distributed data plane, enabling VMs connected to the Logical Switch to resolve ARP requests without broadcasting them.