Free VMware 2V0-15.25 Exam Dumps

In vSAN ESA or OSA networking configured through a dedicated vSphere Distributed Switch (vDS), each vSAN vmkernel port must have at least one Active physical uplink available at all times. The scenario describes a vDS with two physical adapters and two uplinks, but after failure of the active uplink, vSAN traffic was lost. This only occurs when the second physical NIC is not actually assigned to the vSAN port group---typically because its uplink is set to ''Unused''.

In such a misconfiguration:

vSAN traffic only uses the single active uplink.

When that uplink fails, vSAN has no failover path, causing immediate connectivity loss.

Option A (storage policies) does not affect network uplink behavior. Option B (VLAN tagging) could cause connectivity failure but would not suddenly break only after an uplink failure. Option D (failover policy not allowing fallback) affects recovery order, not immediate redundancy.

In VMware Cloud Foundation 9.0, supplemental storage such as NFS is fully supported for workload domains when configured correctly. When an NFS datastore mounts successfully in vSphere but users cannot write data, the issue almost always lies in the export permissions on the NFS server. vSphere will allow mounting a read-only NFS export, but write operations will fail silently at the VM or guest OS level.

VCF documentation confirms that ESXi requires explicit read/write export permissions, typically configured per-host or by IP subnet, on the NFS server. Even if network connectivity and VM-level access appear healthy, incorrect server-side permissions prevent ESXi from executing write operations.

Option A is incorrect because NFS servers are not validated by the HCL for write capability. Option B (rebooting the host) is unnecessary and unrelated to permission enforcement. Option D (MTU mismatch) may cause performance issues, not write-access failures.

Thus, the next troubleshooting step is to verify that the ESXi hosts have read/write access on the NFS share, making C the correct answer.