vSAN Stretched Cluster Configuration Error When Using RVC to Add a Host

If you use the RVC tool to add a host to a vSAN stretched cluster, the configuration of the new host is incomplete.

Problem

After you use the RVC tool to add a host to a vSAN stretched cluster, on the Summary tab for the cluster the Configuration Status for vSAN appears as Unicast agent unset on host.

Cause

When a new host joins a stretched cluster, vSAN must update the configuration on all hosts in the cluster.  If you use the RVC tool to add the host, the update does not occur. The new host successfully joins the cluster, but its configuration is incomplete.

Solution

Verify that all hosts are connected to vCenter Server, and click the link provided in the Configuration Status message to update the configuration of the new host.