# How Do I Check If Sticky Sessions Fail to Take Effect?

1. Check whether sticky sessions are enabled for the backend server group. If sticky sessions are enabled, go to the next step.
2. Check the health check result of the backend server. If the health check result is Unhealthy, traffic is routed to other backend servers and sticky sessions become invalid.
3. If you select the source IP hash algorithm, check whether the IP address of the request changes before the load balancer receives the request.
4. If an HTTP or HTTPS listener is configured with sticky sessions enabled, check whether the request carries a cookie. If yes, check whether the cookie value changes (because load balancing at Layer 7 uses cookies to maintain sessions).

Parent topic: Sticky Session