Printer in different subnet of the same LAN

Bambu Lab X1 Series General discussions
18

I presume you already have your computer(s) and your printer on different VLANs and you just want the printer to broadcast to a computer running Bambu Studio / Orca Slicer / whatever so that it’s discoverable.

I don’t remember exactly if these were exactly the same steps I did, but I presume it will get you somewhere :sweat_smile:

  1. Go to System / Package Manager / Available Packages, search for udpbroadcastrelay and install it.
  2. Go to Services / UDP Broadcast Relay and click on + Add
  3. Give it some descriptive name, under Network Interfaces select your your printer’s VLAN and VLAN(s) you want it to be ‘discoverable’ on
  4. For Destination UDP port to listen on enter 2021
  5. Don’t forget to enable the instance at the top, and enable the UDP Broadcast Relay on its main page as well

That will effectively ‘bridge’ your VLANs (or other interfaces if selected) for any UDP broadcast packages on port 2021, which is what your printer uses to announce its presence and that’s how Bambu Studio or Orca Slicer automagically find it (should start showing immediately under the printer selection on the Devices tab).

Keep in mind that you still need to make sure that your computer(s) VLAN can access the VLAN where your printer resides on, or at least your printer’s IP (i.e., create a Firewall rule for your computer(s) VLAN - Action: Pass, Protocol: Any, Source: <Computer_VLAN> subnets (or a specific computer on it), Destination: <Printer_VLAN> subnets (or a specific IP of your printer) and place it above any rule that might block your computer’s access to other subnets (or anything else for that matter)). You do not need to add any extra provisions for the VLAN on which your printer(s) reside.

Another thing to note - if you’re running a local firewall on your computers, make sure that you let in UDP broadcast traffic coming from your printer’s VLAN (or IP), otherwise it will still not show up in the Devices tab.

When the whole chain is set up properly, you will not even need to enter your printer’s IP or anything of the sort - it will show up in Bambu Studio / Orca Slicer and all you will need to do is enter the Access Code (which you’ll be able to see when you set your printer to a LAN-only mode).

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