Contents:
1. Introduction
This feature is to filter the unwanted LoRaWAN packets. Purpose is to save the upstream traffic especially for a 4G cellular connection. If configured, gateway will process filter for below two types of message:
- Unconfirmed Data Up
- Confirmed Data Up
1.1 Support Devices
- Firmware Version > lgw--build-v5.4.1602379434-20201011-0926 Firmware Download
- LG308, DLOS8
- LPS8
2. Filter Mechanism
Fport & DevAddr filtering
check if the filter is running
2.1 Filter By Fport
The Gateway FPort filter will check all the below LoRaWAN message: Unconfirmed Data Up & Confirmed Data Up. If the packet's FPort doesn't match the FPort setting, it will be dropped.
By default , this value is 0 means can upstream all packets with any FPort. We can set to other FPort so specify only one FPort works.
Fport filtering
In case we set the FPort filter to 45, and the End Node send a packet with Fport other than 45, it will be dropped.
2.2 Filter By DevAddr
Gateway will use a DevAddr mask to check if the Unconfirmed Data Up & Confirmed Data Up packets match the mask . If not, gateway will drop it.
DevAddr filtering
This screenshot shows packets is dropped if DevAddr mask doesn't match.