vxlan / vlan / vnet

[AxelTwin]

Hi everyone,


I'm currently facing some confusion around the concepts of SDN, VXLAN, VNETs, and VLANs in Proxmox.


We have a single Proxmox cluster distributed across 4 sites, and we aim to use VXLAN to create a Layer 2 broadcast domain that spans all sites, allowing us to transport multiple VLANs over it.


Here's what I've done so far:

• I created a VXLAN zone named ztest.

Now, I want to transport VLAN 60 and VLAN 70 over this VXLAN (ztest). My understanding is that I need to create the following:

• vnet60 → zone: ztest, VLAN tag: 60
• vnet70 → zone: ztest, VLAN tag: 70

Then in the VM configuration, for a VM on VLAN 60, I would simply use:

• Bridge: vnet60
• No VLAN tag configured in the VM itself

My question is:
Is this the correct setup in Proxmox SDN? Or can we alternatively create a single VNET with tag 1000 (where 1000 is the VXLAN VNI), and encapsulate VLAN 60 and VLAN 70 within that, like a trunk?


From what I understand, Proxmox SDN takes a 1:1 approach—meaning one VNET corresponds to one VLAN, within a single VXLAN zone.


Can someone confirm this or correct me if I’m misunderstanding the architecture?


Thanks!

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[spirit]

you can do both,

multiple vlans inside 1vxlan tunnel is working ,

but I think than multple vxlan/vnet by network is better.

(not sure about nic offloading performance with vlan inside vxlan)