This is a stab in the dark, but trying turning EEE off on OPNSense.
In the UK, we had issues with the 2.5G port on the DOCSIS 3.1 modem with specific firmware which were related to Energy Efficient Ethernet. We've since had a firmware upgrade on the modem to fix it, but hey...worth a try?
In the UK, we had issues with the 2.5G port on the DOCSIS 3.1 modem with specific firmware which were related to Energy Efficient Ethernet. We've since had a firmware upgrade on the modem to fix it, but hey...worth a try?
"