Accessing Administration of old F5

Your LDAP server IP address will likely be a member of some pool, and that pool is likely applied to a virtual server. Client connections to the IP address assigned to this virtual server will be routed to your LDAP server. How the virtual server is configured will largely dictate how the environment is working.

You should be able to navigate to Statistics -> Module Statistics -> Local Traffic (code version dependent) and search statistics type 'Pools', then specify your IP address to see which pool your LDAP server is assigned to.