2V0-41.24 Question 121
Single answerA company has deployed a VMware NSX environment and configured its Tier-0 gateway in an Active/Active mode, while its Tier-1 gateway is configured in Active/Standby mode. The company is experiencing unexpected traffic drop issues when failover occurs at the Tier-1 gateway. What is the most likely cause of this issue?
- A
The mismatch between the Active/Active and Active/Standby configurations causes asymmetric routing.
- B
Active/Standby mode on the Tier-1 gateway does not support stateful failover.
- C
The Tier-0 gateway requires manual intervention to redistribute traffic during failover.
- D
Tier-1 gateways in Active/Standby mode are not supported with Tier-0 gateways in Active/Active mode.
Show answer and explanation
Correct answer: A
Explanation
The correct answer is that the mismatch between the Active/Active and Active/Standby configurations causes asymmetric routing. This happens because the Tier-0 gateway in Active/Active mode distributes traffic across multiple paths, while the Tier-1 gateway in Active/Standby mode relies on a single active path. When failover occurs at the Tier-1 level, the routing path changes, leading to potential asymmetry and traffic drops. Proper design considerations, such as ensuring consistent configuration modes or using route redistribution strategies, can help mitigate these issues.
- A. Correct.
In this scenario, the mismatch between the Active/Active configuration on the Tier-0 gateway and the Active/Standby configuration on the Tier-1 gateway causes asymmetric routing. This can lead to traffic drops, as the failover in Active/Standby mode disrupts the routing path.
- B. Incorrect.
This is incorrect because stateful failover is supported in Active/Standby mode; however, the issue arises due to routing asymmetry caused by the Active/Active mode at the Tier-0 level.
- C. Incorrect.
This is incorrect because the Tier-0 gateway in Active/Active mode does not require manual intervention to redistribute traffic. The issue lies in the configuration mismatch between Tier-0 and Tier-1 gateways.
- D. Incorrect.
This is incorrect because Tier-1 gateways in Active/Standby mode are supported with Tier-0 gateways in Active/Active mode, but proper design considerations must be taken to prevent asymmetric routing or traffic loss.