Add support to specify VLAN # when using Bridged Network Mode

[pquiring]

Trying to use Bridged mode in WSL2 on Windows Server 2025 and need to use a VLAN number. This is a Hyper-V server running several other Windows VMs, each has their Virtual NICs on different VLANs.

Need WSL to use a VLAN on it's virtual NIC that is on the virtual switch like other VMs that are configurable in HyperV Manager.

Maybe something in .wslconfig

[wsl2] 
networkMode=bridged
vmSwitch="VirtualSwitch"
networkBridgedVlan=123

Some AI searches offered some workarounds but nothing works.

Using a native VLAN on the interface would disrupt other VMs already using the VLAN.

Windows Server 2025 does not support mirrored mode.

Thanks,

[github-actions[bot]]

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[pquiring]

There is no error messsage, wsl does start in Bridged mode BUT since it's using the native VLAN, there is no network there.

[pquiring]

/feature

[github-actions[bot]]

Diagnostic information

Found '/feature', adding tag 'feature'

[pquiring]

Found a workaround.
Assigned a native VLAN to the switch port this interface connects to that is not in use by other VMs.
Not an ideal solution for a VM server.

[pquiring]

Better soln would be to expose the WSL VM in HyperV manager so we could configure it there.