When managing an NLB cluster, you get this warning:
Running NLB Manager on a system with all networks bound to NLB might not work as expected.
If all interfaces are set to run NLB in “unicast” mode, NLB Manager will fail to connect to hosts…
You get a warning saying that NLB might not work as expected because you are trying to manage the NLB from the server with NLB on it. Manage the NLB server using NLB Manager on another server and you won’t get the warning. Alternatively, ignore the warning because it probably won’t matter anyway 🙂