Printer in different subnet of the same LAN

Bambu Lab X1 Series General discussions
33

If you have a Linux box (like a Raspberry PI) that can talk to both VLANs you can use socat to forward the broadcast using this command:

socat -u  UDP4-RECVFROM:2021,fork,so-bindtodevice=eth0.2,broadcast  UDP4-SENDTO:192.168.178.255:2021,broadcast

Replace eth0.2 with the interface name for the VLAN which contains your printer and 192.168.178.255 with the broadcast address of the VLAN in which your computer is.

I put this in a small systemd service file in /etc/systemd/system/bambu-broadcast.service:

[Unit]
Description=Forward Bambulab Broadcast
After=network.target

[Service]
Type=exec
ExecStart=/usr/bin/socat -u  UDP4-RECVFROM:2021,fork,so-bindtodevice=eth0.2,broadcast  UDP4-SENDTO:192.168.178.255:2021,broadcast
Restart=on-failure

[Install]
WantedBy=default.target
RequiredBy=network.target
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