level=error msg="processing rx packet error: invalid FCnt or too many dropped frames"

brocaar / chirpstack-network-server

ChirpStack Network Server is an open-source LoRaWAN network-server.

https://www.chirpstack.io

MIT License

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level=error msg="processing rx packet error: invalid FCnt or too many dropped frames" #103

Closed lancezhangsf closed 7 years ago

lancezhangsf commented 7 years ago

HI brocaar: i run the loraserver for some time ,then restart my node ,show the error msg:

12月 01 16:23:39 zhangsf-virtual-machine loraserver[3758]: time="2016-12-01T16:23:39+08:00" level=error msg="processing rx packet error: invalid FCnt or too many dropped frames" data_base64="QIHCxQGADgACHhLfJ/Fx"

brocaar commented 7 years ago

It is exactly what is says :-) The FCnt value must always increment in order to avoid replay attacks, in your case it went back to 0 because of the reset. For convenience you can turn on Enable relax frame-counter in the web-interface. The most secure way is to re-activate your node (OTAA) after a reset.