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ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND
ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND is HRESULT 0xC0370200 in the Hyper-V virtual-switch binding area of the Windows virtualization stack. The built-in message names the immediate result; the useful custom context is the exact boundary: resolving a configured Hyper-V virtual switch name on the current host. Record the first returning operation and host-side event before a management layer retries or translates it.
Object lifecycle behind the result
The VM or network operation refers to a switch name that is absent on this host. Switch names are host configuration, so import, restore, rename, or migration can leave a valid VM configuration pointing to no local switch.
This result is resolved in host networking configuration. A Hyper-V virtual switch is a host object that can be enumerated by name or ID; a VM configuration copied to another host does not create a matching switch automatically.
Neighboring result: This status does not prove the physical NIC or external network is down; lookup fails before traffic can use the switch. First establish whether the named VMSwitch object exists.
Diagnostic evidence matrix
| Evidence | Why it changes the diagnosis |
|---|---|
| Configured switch reference | Record VM adapter, expected switch name, and any switch ID. |
| Host inventory | Capture Get-VMSwitch output, switch type, bound adapters, and extensions. |
| Mobility history | Note import, cluster move, host rebuild, rename, or deleted switch. |
| Network intent | Keep whether the VM requires External, Internal, Private, SET, or another host-specific design. |
Preserve identifiers and counts without dumping guest secrets or unrelated memory. Useful this result timestamps include the last successful operation, first failure, any automatic retry, and the object-generation change that followed.
Test one variable at a time
- Enumerate the destination host and compare exact names before attaching the adapter.
- Map imported VMs to an explicitly chosen existing switch rather than guessing by partial name.
- Create a replacement switch only after confirming physical adapter and management-OS connectivity requirements.
- For clusters, validate consistent virtual-switch intent on every possible owner node.
Compare the exact VM adapter reference with the current host switch inventory. In the case, a switch with a similar display name is not a safe substitute unless network role, type, uplink, extensions, and cluster intent match.
How to read the controls
Across these controls for it, preserve resolving a configured Hyper-V virtual switch name on the current host as the boundary under test.
| Control | Interpretation | Hold constant |
|---|---|---|
| Stable ID and explicit remap — this result | An explicit adapter-to-switch mapping succeeding shows this result came from stale or host-specific naming, not guest networking. | Keep the VM adapter and intended network role unchanged. |
| Every cluster or migration node — it | If it follows one destination, compare switch intent and naming on all possible owners. | Do not create an arbitrary same-named switch during the result comparison. |
| Exact host inventory — it | If the configured name is absent from Get-VMSwitch, it is a host-object lookup failure before packet flow begins. | Record exact name, ID, type, and host for it. |
Boundaries of this status
Do not create or select a same-named switch blindly to clear it. A false it workaround can change isolation, uplink, VLAN, management-OS connectivity, or extension behavior.
Regression proof
The adapter is bound to the intended current switch on every target host, VM networking works, and no accidental switch with a similar display name was selected. Repeat the original operation under the original supported conditions and retain one deliberate negative control. A management command succeeding on a different object is not sufficient to close this incident.
Technical references
These sources define it and the host virtual-switch objects used to resolve an adapter binding.
- Microsoft Open Specifications: HRESULT values — used to interpret the boundary.
- Microsoft: Get-VMSwitch — used to interpret the boundary.
- Microsoft: create a Hyper-V virtual switch — used to interpret the boundary.
- Microsoft: Hyper-V migration troubleshooting — used to interpret the boundary.
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