Hosts in a Network Load Balancing (NLB) cluster are configured to load balance network traffic. Host configuration is set by using NLB Manager, and if it is not configured properly, the NLB cluster may not function correctly.
Ensure a consistent number of virtual IP addresses and subnet masks
On all Network Load Balancing (NLB) cluster hosts, the virtual IP addresses must have an equal number of subnet masks specified.
To ensure that the number of virtual IP addresses is the same as the number of subnet masks:
Click Start, click Administrative Tools, and then click Network Load Balancing Manager. You can also open NLB Manager by typing Nlbmgr at a command prompt.
If NLB Manager does not already list the cluster, connect to the cluster.
Right-click the host that you want to configure, and then click Host Properties.
Click the Host Parameters tab.
In IP address and Subnet mask, verify that for each virtual IP address there is a corresponding subnet mask. If necessary, enter a valid virtual IP address or subnet mask.