Can an MSCS cluster be connected to different IP subnets?
(This is possible with a single Windows NT-based server, even with a single NIC, by binding different IP addresses to the NIC and by letting Windows NT Server route between them.) For example, can MSCS support the following configuration: Yes, MSCS permits servers in a cluster to be connected to multiple subnets. MSCS supports physical multi-homing no differently than Windows NT Server does. The scenario shown in the picture above is perfectly acceptable. The two external subnets (1 and 2) could connect the same clients (redundant fabrics) or two different sets of clients. In this scenario, one of the external subnets (#1 or #2) would also have to be a backup for intracluster communication (or, back up the private subnet #3), in order to eliminate all single points of failure that could split the cluster. Note that MSCS would not support a slightly different scenario: NodeA only on Subnet1, NodeB only on Subnet2, with Subnet1 and Subnet2 connected by a router. This is because there is
