5 mo. ago • 90%

VLAN question

I've finally been connected to a fiber connection 2,5/1Gbps! 🥳 Now I want to share my connection with my neighbor and so I've installed 3 PCIx dual 1GB nic (I'm out of PCIe slots 🤷‍♂️).

The connections comes from my OPNsense to the server (Proxmox) via a 10Gbps fiber connection.

I want OPNsense to take car of firewalling dividing the neighbor networks with VLANs. The OPNsense part is done and working, I need to assign to each of the 6 1Gbps NIC each VLAN.

I've tagged the traffic going into the server via the fiber connection, but now how can I assign each VLAN to each NIC? Thanks!

Edit: Proxmox has nothing to do in the equation, it just happens to be on the same server where the NICs are.

29 comments

Can we be neighbors?

15
- Of course! But I must advice that you will be limited to 1/0,5Gbps! 😁
  
  4
  
  I would take that any day!
  
  5
Draw us a topology drawing. Please.

8
- Forget everything that I've written, I just need to assign 6 VLAN (tagged, coming in from enp2s0) to 6 NICs (untagged to: enp9s1f0, enp9s1f1, enp9s2f0, enp9s2f1, enp10s1f0, enp10s1f1).
  
  2
  
  If the connections are already tagged as you come into the Proxmox server, then you need only to create interfaces for them in Proxmox (vmbr1, vmbr2, etc). EDIT: if you’re doing PCI passthrough of the physical NICs, ignore this step.
  
  Then, in OPNsense, you just adding the individual interfaces. No need to assign a VLAN inside OPnsense because the traffic is already tagged on the network (per your earlier statement).
  
  Whether or not the managed switch that has tagged each port is also providing VLAN isolation, you’ll simply use the OPNsense firewall to provide isolation, which it does by default. You’ll use it to allow the connections access to the fiber WAN gateway.
  
  4
If all you want is to break out the VLANs to NICs using a Linux PC instead of a managed switch, create six bridge interfaces and put in each bridge the VLAN interface and the NIC.

4
- This is how I would do it also, assuming you aernt passing the NICs through to VMs
  
  3
- I Just didn't know how to do it; @Kryesh@lemmy.world in its post up here told me. Pretty easy!
  
  1
I have no clue what you're talking about but feel your pain in this Stackoverflow-like thread. Accept this website as my condolences.

3
- Stolen, bookmarked. Thank you. P.s.: Can't understand the downvotes either.
  
  2
If you just want each physical interface on your server to participate in a single VLAN, set the corresponding switch port as an access port in the desired VLAN, and then configure each server interface as a normal untagged interface.

You would only do tagged frames (802.1q trunking) if you wanted to support several VLANs on the switch port.

2
- Yes, but...how do I do that?
  
  1
Vmbr0 should be your VLAN aware bridge. You create this in the pve networking dashboard.

Then create vmbr0_101 (where 101 is your vlan). Also create vbmr0_102, and so on.

Assign those vmbr0_xxx to each of the VMs.

If you host all the VM's on the same box, create all the vmbr0_xyz in the pve dash, and in each VM/container>networking assign it.

1
- I don't need to assign VLANs to VMs, I need to assign them to 6 phisical NICs (tha fact that they are installed in the same machine where there is Proxmox is irrelevant).
  
  1
  
  If Proxmox is already installed on the machine, how are you running OPNSense? If it’s not bare metal, it’s a VM, and if it’s a VM it needs Proxmox’s virtual NICs to be VLAN aware, unless you are doing PCI pass through of the entire network card.
  
  3
Some diagram would help. Are you trying to use your server as a switch?

1
I understand the attraction of virtualising this, but unless you want to share more than just the ISP connection, I would be providing Internet access to your neighbour’s untrusted network using a bare-metal router. Just my two cents.

1
- Mmm...I'm notr trying to virtualize anything. I'll edit the post to make it clear.
  
  1
New Lemmy Post: VLAN question (https://lemmyverse.link/lemmy.world/post/15895808)
Tagging: #SelfHosted

(Replying in the OP of this thread (NOT THIS BOT!) will appear as a comment in the lemmy discussion.)

I am a FOSS bot. Check my README: https://github.com/db0/lemmy-tagginator/blob/main/README.md

-2
With the disclaimer that Proxmox has nothing to do with this question, I’m forced to assume this is just a networking issue that happens to use OPNsense as the router. Because of that, I must advise that you seek help from a networking-focused community. There’s no clear link to self-hosting in this post, which is required per Rule 3.

-2
- I know that you are right...sorry, but...
  
  1

You've viewed 29 comments.