VCP-VCF Administrator 2024 Question 339
Select 3An organization is experiencing issues with their NSX load balancer. Users report intermittent connectivity issues to a web application deployed across multiple virtual servers. Upon investigation, the administrator notices that some backend servers are receiving significantly more traffic than others. Which of the following steps should the administrator take to resolve this issue?
- A
Verify that the load balancing algorithm is appropriately configured to ensure even traffic distribution.
- B
Check the health monitor configuration to ensure that it is correctly detecting unhealthy backend servers.
- C
Increase the timeout value for the load balancer session persistence settings to reduce traffic redistribution.
- D
Review the backend server weights to confirm they are set proportionally to the server capacities.
- E
Ensure that the NSX Edge appliance hosting the load balancer service has sufficient CPU and memory resources.
Show answer and explanation
Correct answers: A, B, D
Explanation
The reported issue of uneven traffic distribution can occur due to a misconfigured load balancing algorithm, improperly functioning health monitors, or incorrect server weight settings. Correctly configuring these elements ensures that traffic is distributed evenly across servers and unhealthy servers are not included in the load balancing pool. While resource contention on the NSX Edge appliance can cause general performance issues, it does not directly lead to uneven traffic distribution.
- A. Correct.
If the load balancing algorithm is not configured correctly (e.g., set to 'round-robin' instead of a more suitable algorithm like 'least connections'), traffic may not distribute evenly across servers.
- B. Correct.
Health monitors ensure that only healthy backend servers receive traffic. If misconfigured, unhealthy servers might still receive traffic, causing intermittent connectivity issues.
- C. Incorrect.
Increasing the timeout value for session persistence will not address uneven traffic distribution, as it is unrelated to the load balancing algorithm or backend server health checks.
- D. Correct.
Backend server weights determine how much traffic each server should handle relative to others. If weights are not configured proportionally to server capacities, some servers may receive more traffic than they can handle.
- E. Incorrect.
Insufficient CPU or memory on the NSX Edge appliance could cause performance issues, but it is not directly related to uneven traffic distribution across backend servers.