Event ID - 21

Event Id21
SourceWLBS
DescriptionHost 1 does not have the same number or type of port rules as this host. Please check WLBS Setup dialog on all machines that belong to the cluster and make sure that they all contain the same number and the same type of port rules.
Event InformationError Message Explanation: This event is logged when another host in the cluster either contains a different number of port rules from the local host, or its configured port rules conflict with the port rules of the local host. The cluster will not converge until the problem is corrected.

User Action
(Windows Server 2003): Using Network Load Balancing (NLB) Manager, edit the port rules as appropriate on each host so that the port rules are consistent on all hosts in the cluster. For more information about editing port rules in NLB, see Help and Support. 

User Action
(Windows 2000 Server): Edit the port rules as appropriate on each host so that the port rules are consistent on all hosts in the cluster. For more information about editing port rules in Network Load Balancing, see Help.
Reference Links

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.