3 dBm is a good point. I’m gonna hit that and a drop in speed of the port channel. Gonna come back with the outcome.
On how to measure and evaluate the long term development of a degradation, You suggest copiing the values to a text file and running an comparison on the raw data - I thought about the same, but doing that within LibreNMS and using the data stored in the corresponding RRD, as it is already stored (and consolidated) raw data.
Thank Y’all or the hints and ideas, gotta ponder and test a bit. Will be back.