The packet forwarder is a program running on the host of a Lora gateway. It forwards RF packets received by the gateway to a server through an UDP/IP link, and emits RF packets that are sent by the server.

Every X seconds the program displays statistics about the received and sent RF packets, and about the received and sent network datagrams. The program also sends a few statistics to the server in JSON format.

For a full packet forwarder description and the way it works, read the “Semtech readme file” available in each packet forwarder resource page.

1. Choose the packet forwarder to install from the resource page. Choosing the latest version of the packet forwarder is recommended.
2. Retrieve the matching firmware and FPGA packages (check compatibility on the packet forwarder page). Update them if necessary (see software updates page).
3. Download the packet forwarder precompiled .ipk file.
4. Install the .ipk file using the instructions of the software updates page.
5. Edit the packet forwarder configuration.

• Wirnet™ iBTS Packet Forwarder v5.1.0-klk4 - instructions (June 2018)

The associated Semtech HAL is indicated in the name of IPK:

• packet-forwarder-v2_<version>-<HAL>_klk_lpbs.ipk

Modify the firewall rules in the file /user/spf2/bin/execute_spf2.sh.

In this file, the rules must be set with iptables -I (insert) instead of iptables -A (append).

The following commands will correctly adapt the script /user/spf2/bin/execute_spf2.sh:

sed -i "/null/ s/-A/-I/" /user/spf2/bin/execute_spf2.sh
/etc/init.d/firewall restart
monit restart spf2