AWS - Elastic Load Balancing
You enabled cross-zone load balancing on a Classic Load Balancer but still see uneven traffic distribution. What could be wrong?
You enabled cross-zone load balancing on a Classic Load Balancer but still see uneven traffic distribution. What could be wrong?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Verify prerequisites for cross-zone load balancing
Cross-zone load balancing requires instances registered in multiple zones to distribute traffic evenly.Step 2: Analyze other options
Classic Load Balancers support cross-zone load balancing, no restart needed, and it is not supported on Network Load Balancers.Final Answer:
Instances are not registered in all availability zones -> Option BQuick Check:
All zones need instances for cross-zone to balance [OK]
Quick Trick: Register instances in all zones for cross-zone to work [OK]
Common Mistakes:
- Thinking cross-zone is unsupported on Classic LB
- Believing a restart is required
- Confusing Network Load Balancer support
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