• Elastic Load Balancing

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  2. Elastic Load Balancing
  3. User Guide
  4. Best Practices
  5. Classic Load Balancer

Classic Load Balancer


  • TCP is used to forward the requests.
  • There is a large number of persistent connections.
  • Backend ECSs can evenly process requests.
  • All requests from the same client are forwarded to the same ECS.

Configuration Reference

  1. Create a load balancer. Specify the following information as required:
    • Enter a name for the load balancer.
    • Select Public network for Network Type.
    • Select a VPC.
    • Set the bandwidth.
  2. Add a listener. Specify the following information as required:
    • Select TCP for Frontend Protocol.
    • Select TCP for Backend Protocol.
    • Select Round robin for Load Balancing Algorithm.
    • Enable Sticky Session.
    • Configure Stickiness Duration, which must be longer than the session timeout duration. For example, if the session timeout duration is 3000s, you can set Stickiness Duration to 3600.
    • Select TCP for Health Check Protocol.
  3. Add backend ECSs.
  4. Check the health check result of target ECSs.