| Event Id | 50 |
| Source | WLBS |
| Description | NLB Cluster %2 %1: Cannot add cluster MAC address. The maximum number of multicast MAC addresses are already assigned to the NIC. %3 %4 |
| Event Information | According to Microsoft: Cause: The network adapter has the maximum number of multicast MAC addresses assigned to it already. Other programs might have added multicast addresses with the result that Network Load Balancing (NLB) cannot add the MAC addresses needed to operate an NLB cluster in multicast mode. User Action : Perform one or more of the following to correct the problem: 1. Use a network adapter that allows an increased number of multicast MAC addresses to be configured. 2. Operate the cluster in unicast mode. |
| Reference Links | Cannot add cluster MAC address. The maximum number of multicast MAC addresses are already assigned to the NIC |
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