When you spend several hours googling why the LAN port is stuck in 10/100. Turns out the HP Pro Curve 2620-48POE switch is only 10/100. Doh! : r/Ubiquiti
Allow Unsupported transceiver command by Aruba - Skylane Optics
HP Switch Unsupported SFP Transceiver Problem – Mert Erdil | Network, Security & Linux