NLB Filter Hooks Configuration

Applies To: Windows Server 2008 R2

Filter hooks help to direct traffic in a Network Load Balancing (NLB) cluster by filtering network packets. If the filter hooks are not properly configured, the NLB cluster will continue to converge and operate normally, however, the server application that is running with NLB will not be able to properly register the hooks.


Event ID Source Message



NLB cluster [%2]: The NLB driver failed to register/unregister the hook interface. The cluster will converge and operate normally but no hook decisions will be left for the registering application. Please check with the application using NLB and make sure it is registering the hooks properly.

NLB Host

NLB Cluster