The thing is, that if I setup hosts in cluster to use backup Network, the vitual IP and FQDN will not answer. If I utilize domain Network for clustering, it works okay. I´m not sure, what is the best way to configure it when using NLB. My backup Network is configured to use different vLAN and tcp/ip settings have only IP and subnet mask. Gateway adress is not in use.
I have been playing with fail-over cluster which is different technology, and there backup Network is different from production Network, locating in different vLAN so the connector between 2 nodes is totally different that production/domain Network.
But with NLB, this seems not working.