VLAN question

I've finally been connected to a fiber connection 2,5/1Gbps! šŸ„³
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 šŸ¤·ā€ā™‚ļø).

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.

TheHolm ,
@TheHolm@aussie.zone avatar

Some diagram would help.
Are you trying to use your server as a switch?

Glitterbomb ,

Can we be neighbors?

peregus OP ,

Of course! But I must advice that you will be limited to 1/0,5Gbps! šŸ˜

Mixel ,

I would take that any day!

i_am_not_a_robot ,

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.

hungover_pilot ,

This is how I would do it also, assuming you aernt passing the NICs through to VMs

peregus OP ,

I Just didn't know how to do it; @Kryesh in its post up here told me. Pretty easy!

HybridSarcasm Mod ,
@HybridSarcasm@lemmy.world avatar

With the disclaimer that Proxmox has nothing to do with this question, Iā€™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. Thereā€™s no clear link to self-hosting in this post, which is required per Rule 3.

peregus OP ,

I know that you are right...sorry, but...

DarkDarkHouse ,
@DarkDarkHouse@lemmy.sdf.org avatar

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 neighbourā€™s untrusted network using a bare-metal router. Just my two cents.

peregus OP ,

Mmm...I'm notr trying to virtualize anything.
I'll edit the post to make it clear.

Paulemeister ,

I have no clue what you're talking about but feel your pain in this Stackoverflow-like thread. Accept this website as my condolences.

Cobrachicken ,

Stolen, bookmarked. Thank you.
P.s.: Can't understand the downvotes either.

solidgrue ,

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.

peregus OP ,

Yes, but...how do I do that?

invisiblegorilla , (edited )

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.

https://sh.itjust.works/pictrs/image/3d4f7f1b-4871-4490-83c2-f42d1d06a341.jpeg

https://sh.itjust.works/pictrs/image/9ea741a3-1428-4f19-9528-b7efd74c74c4.jpeg

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.

peregus OP ,

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).

4am ,

If Proxmox is already installed on the machine, how are you running OPNSense? If itā€™s not bare metal, itā€™s a VM, and if itā€™s a VM it needs Proxmoxā€™s virtual NICs to be VLAN aware, unless you are doing PCI pass through of the entire network card.

HybridSarcasm Mod ,
@HybridSarcasm@lemmy.world avatar

Would they have to be VLAN aware if the switch port was already tagged AND if OP doesnā€™t care to consider untagged traffic ?

peregus OP ,

OPNsense is in one PC (and it only works as router/firewall), Proxmox is on another PC with all the NICs and Proxmos and it will also work as switch.

Eideen ,
@Eideen@lemmy.world avatar

Draw us a topology drawing. Please.

peregus OP ,

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).

HybridSarcasm Mod , (edited )
@HybridSarcasm@lemmy.world avatar

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 youā€™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, youā€™ll simply use the OPNsense firewall to provide isolation, which it does by default. Youā€™ll use it to allow the connections access to the fiber WAN gateway.

peregus OP ,

I've just edited the original post to make clear that Proxmox has nothing to do in this picture, it just is installed in the same PC where the NICs are.
What I need it just assign 6 VLAN (tagged, coming in from enp2s0) to 6 NICs (untagged to: enp9s1f0, enp9s1f1, enp9s2f0, enp9s2f1, enp10s1f0, enp10s1f1).

Kryesh , (edited )

So the PC connected to opnsense is running proxmox for it's OS?
Create a bridge for each physical interface, then add a tagged interface to it for the one connected to opnsense;
Eg, vmbr2 could have enp2s0.100 and enp9s1f0 as members. Just add .vlanid to the end of the interface name in the bridge settings in proxmox, and don't make the bridges vlan aware.
If vmbr0 is vlan aware then just add vmbr0.100 instead of enp2s0.100
With that setup the server will switch packets between the vlans on enp2s0 and the other interfaces. Don't need to put any VMs on the bridges

Will add: this is using the PC like a switch, you're probably better off using an actual switch with vlan configuration instead

peregus OP ,

That's it, thanks!!! So easy!!! Thanks a lot!

I know that it would be better to use a switch, but I would need a 10Gbps (or 2,5Gbps, do they exists) switch with 2 sfp+ port (1 for Internet connection and the second one for the server). In this way I've just bought the 3 old NIC for 25ā‚¬ and that's it. I know that they will consume way more than the switch, but how many years do I need to break even?

Mountain_Mike_420 ,

Well it depends on how much you pay for power and what your pc consumes at idle (or at least idling while doing networking). Iā€™d do an analysis and a graph with excel to make sure. Many old (used) networking components can be had for a steal and will still have many years of use still left in them. Use a kill-a-watt to get an accurate account of idle pc power.

tagginator Bot ,

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