2V0-41.24 Question 173
Single answerAn organization deploys a stateful active-active NAT configuration in their NSX-T Data Center environment. During a maintenance window, one of the Edge nodes in the active-active configuration is taken offline. What will happen to the NAT sessions that were handled by the offline Edge node?
- A
The NAT sessions will fail, and the traffic will be dropped.
- B
The NAT sessions will seamlessly failover to the remaining active Edge node.
- C
The NAT sessions will remain active on the offline Edge node and resume when it comes back online.
- D
The NAT sessions will failover to the remaining active Edge node only if the state synchronization is enabled.
Show answer and explanation
Correct answer: D
Explanation
Stateful active-active NAT relies on state synchronization between Edge nodes to ensure that established NAT sessions can failover seamlessly in the event of an issue with one of the nodes. If state synchronization is not enabled, the state information of the NAT sessions cannot be transferred to the remaining active Edge node, and traffic associated with those sessions will be dropped. Thus, state synchronization is a critical requirement for maintaining session continuity in stateful active-active NAT configurations.
- A. Incorrect.
Incorrect: In a stateful active-active NAT configuration, sessions do not immediately fail, but their behavior depends on state synchronization.
- B. Incorrect.
Incorrect: Seamless failover would only occur if state synchronization is enabled. Without it, the sessions would not fail over automatically.
- C. Incorrect.
Incorrect: Sessions cannot remain active on an offline Edge node, as the node cannot process traffic while offline.
- D. Correct.
Correct: For stateful active-active NAT, synchronized state information is required between Edge nodes to enable failover. Without state synchronization, failover will not occur, and traffic will be dropped.