A BIG-IP Administrator disabled a virtual server with a pool that has a working health...

BIG-IP status icons provide immediate visual feedback regarding the state of an object based on its availability and enabled/disabled status.

Color (Black): The color black indicates that an object has been manually Disabled by an administrator.

Shape (Circle): The circular shape indicates that the object is Available (i.e., its health monitors are passing).

Scenario Result: Since the virtual server is manually disabled (Black) but its associated pool has a working health monitor that is currently passing (Circle), the resulting icon is a Black Circle.