2V0-41.24 Question 86
Single answerIn a VMware NSX-T environment, how is ARP suppression achieved to reduce broadcast traffic within an overlay network?
- A
By intercepting ARP requests at the Tier-1 Gateway and responding with cached information.
- B
By storing ARP entries in the Distributed Firewall and using them to respond to ARP requests.
- C
By maintaining an ARP table on each Transport Node's local VTEP and responding locally to ARP requests.
- D
By using the central controller to respond to all ARP requests within the overlay network.
Show answer and explanation
Correct answer: C
Explanation
ARP suppression in NSX-T reduces broadcast traffic by enabling each Transport Node's VTEP to maintain a local ARP cache. When an ARP request is received, the Transport Node can respond directly using its cached ARP entries, eliminating the need to broadcast the request across the network. This improves network efficiency and reduces unnecessary overhead.
- A. Incorrect.
Incorrect: The Tier-1 Gateway is not involved in ARP suppression. ARP suppression is handled at the Transport Node level within the overlay.
- B. Incorrect.
Incorrect: The Distributed Firewall is not used for ARP suppression. Its purpose is to enforce security policies, not manage ARP requests.
- C. Correct.
Correct: Each Transport Node maintains a local ARP table as part of the VTEP (VXLAN Tunnel Endpoint) functionality. ARP suppression is achieved by responding to ARP requests locally without broadcasting them across the network.
- D. Incorrect.
Incorrect: The NSX Controller is used for centralized control plane tasks but does not directly handle ARP requests. ARP suppression occurs at the Transport Node level, not centrally.