Hi everyone,
How long is the time window where packets are de-duplicated? What would happen if a gateway has high latency on its uplink? I have not found any information on this.
The information is on the forum…
Packets received from that gateway (or any other) after the deduplication window has closed are considered replay (attack) packets and are dropped in stead of forwarded to the application.
The v2 version of the infrastructure used to have a “is_retry” flag in the MQTT uplink message.
The docs for v3 at Data Formats | The Things Stack for LoRaWAN no longer mentions it, so I’m pretty sure the field has been removed from the and duplicated packets will be dropped by the network. Also this remark is in line with that:
Troubleshooting Console | The Things Stack for LoRaWAN