2V0-621 · Question #137
When attempting to remove a host from a vSphere Distributed Switch (vDS), an administrator observes the error message: The resource '16' is in use What are two reasons why this error would be…
The correct answer is A. VMkernel network adapters on the vDS are in use. B. Virtual machine network adapters are connected to the vDS. When removing a host from a vDS, VMware prevents the operation if any network adapters - VMkernel or VM virtual NICs - are still bound to the switch, because the switch ports are actively referenced resources.
Question
When attempting to remove a host from a vSphere Distributed Switch (vDS), an administrator observes the error message:
The resource '16' is in use What are two reasons why this error would be displayed? (Choose two.)
Options
- AVMkernel network adapters on the vDS are in use.
- BVirtual machine network adapters are connected to the vDS.
- CNetwork I/O Control has been configured on the vDS.
- DThere is active network traffic on the vDS.
How the community answered
(54 responses)- A83% (45)
- C6% (3)
- D11% (6)
Why each option
When removing a host from a vDS, VMware prevents the operation if any network adapters - VMkernel or VM virtual NICs - are still bound to the switch, because the switch ports are actively referenced resources.
VMkernel adapters (used for management, vMotion, iSCSI, NFS, etc.) are port group consumers on the vDS. As long as a VMkernel adapter remains associated with the vDS, the switch port resource is marked in-use and the host cannot be removed.
Virtual machine vNICs connected to vDS port groups hold active port bindings on the distributed switch. The host cannot be removed from the vDS until all VM network adapters are either migrated or disconnected from the vDS.
Network I/O Control is a traffic-shaping policy configured on the vDS itself, not a per-host resource reservation that blocks host removal.
The presence or absence of active network traffic does not constitute a resource lock; it is the adapter-to-port binding, not packet flow, that prevents removal.
Concept tested: vDS host removal - adapter resource binding requirements
Source: https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-networking/GUID-375B45C7-684C-4C51-BA3C-70E48DFABF04.html
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