After you enable Virtual SAN on a cluster, the datastore is not assembled correctly because of a detected network misconfiguration.
After you enable Virtual SAN on a cluster, on the Summary tab for the cluster the Network Status for Virtual SAN appears as Misconfiguration detected.
One or more members of the cluster cannot communicate because of either of the following reasons:
A host in the cluster does not have a VMkernel adapter for Virtual SAN.
The hosts cannot connect each other in the network.
Multicast is not enabled on the physical switch.
Join the members of the cluster to the same network or enable multicast on the physical switch. See Configuring Virtual SAN Network.