I am trying to create a two-node NLB cluster for Exchange 2013 CAS and it just will not work. The two servers are VMs running on VMWare 5.x, two NICs using VMXNET 3 adapters. When I first create the cluster, I can connect to OWA using the node1 NLB NIC and to the cluster's virtual IP. As soon as I add node2, I can no longer connect OWA using the cluster's virtual IP, nor the NLB NIC on node2, and node2 will not respond to pings, but I can still connect to OWA using the NLB NIC on node1.
If I remove either node everything will start working. I can connect to OWA using both nodes' NLB NIC and the cluster virtual IP address, and node2 still start responding to pings.
I don't see any errors in the event logs and both servers continue to listen on all ports when they are part of the cluster. Firewalls have been turned off on both nodes.
Heriberto Contreras