If your L4 switch can perform both SSL and non-SSL health checks, you must configure the L4 switch only for the services that you are using in your Access Manager configuration. For example, if you configure the SSL service and the non-SSL service on the L4 and the base URL of your Identity Server configuration is using HTTP rather than HTTPS, the health check for the SSL service fails. The L4 switch then assumes that all Identity Servers in the cluster are down. Therefore, ensure that you enable only the services that are also enabled on Identity Server.