HRESULT 0xC0370200 (ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT

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A virtual switch with the given name was not found.

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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. For ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, 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.

ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND 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.

For ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, preserve identifiers and counts without dumping guest secrets or unrelated memory. Useful ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND 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.

For ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, compare the exact VM adapter reference with the current host switch inventory. In the ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND 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 ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, 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 — `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND`	An explicit adapter-to-switch mapping succeeding shows `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND` came from stale or host-specific naming, not guest networking.	For `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND`, keep the VM adapter and intended network role unchanged.
Every cluster or migration node — `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND`	If `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND` follows one destination, compare switch intent and naming on all possible owners.	Do not create an arbitrary same-named switch during the `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND` comparison.
Exact host inventory — `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND`	If the configured name is absent from Get-VMSwitch, `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND` is a host-object lookup failure before packet flow begins.	Record exact name, ID, type, and host for `ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND`.

Boundaries of this status

Do not create or select a same-named switch blindly to clear ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND. A false ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND 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. For ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, repeat the original operation under the original supported conditions and retain one deliberate negative control. For ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND, a management command succeeding on a different object is not sufficient to close this incident.

Technical references

These sources define ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND and the host virtual-switch objects used to resolve an adapter binding.

Microsoft Open Specifications: HRESULT values — used to interpret the ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND boundary.
Microsoft: Get-VMSwitch — used to interpret the ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND boundary.
Microsoft: create a Hyper-V virtual switch — used to interpret the ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND boundary.
Microsoft: Hyper-V migration troubleshooting — used to interpret the ERROR_VNET_VIRTUAL_SWITCH_NAME_NOT_FOUND boundary.

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