Pass trunk to VM

J

johnnyb123

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Proxmox Subscriber
Apr 9, 2025
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I want to set up a trunk on my switch and create a bridge in Proxmox that I can assign to a VM. Within the VM, I want to be able to treat the interface as though it is directly connected to the switch, with the trunk available. Then I want to be able to create sub interfaces on the VM on different VLANs.

I could pass the NIC through to the VM instead of creating the bridge, but I want to be able to do this with more than one VM.

So before I go down the rabbit hole, I wanted to see if anyone else has already accomplished this setup.

Switch config:

interface ethernet 2/25
switchport mtu 9216
switchport mode trunk
switchport trunk allowed vlan 10,20,30,40,50
 
What's the use case? I think you will need to pass more than just the trunk. I think you will also need to pass through a tagged interface so that you can access the VM operating system
 
johnnyb123 said:
I want to set up a trunk on my switch and create a bridge in Proxmox that I can assign to a VM. Within the VM, I want to be able to treat the interface as though it is directly connected to the switch, with the trunk available. Then I want to be able to create sub interfaces on the VM on different VLANs.

I could pass the NIC through to the VM instead of creating the bridge, but I want to be able to do this with more than one VM.

So before I go down the rabbit hole, I wanted to see if anyone else has already accomplished this setup.

Switch config:

interface ethernet 2/25
switchport mtu 9216
switchport mode trunk
switchport trunk allowed vlan 10,20,30,40,50
Click to expand...
You need to configure the bridge in proxmox as "vlan aware" and config the virtual ethernet without tag.

I works like a charm.

Bruno
 
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