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Fixing no carrier with Flypro 10GBASE-T SFP+ on a Dell-branded X520-DA2 under Debian and FreeBSD/OPNsense
A Dell-branded Intel X520-DA2 with Flypro 10GBASE-T SFP+ modules showed no carrier (or no interface at all) on Debian and on FreeBSD-based OPNsense because the card rejects unapproved modules. The post collects the per-OS fixes and the permanent EEPROM approach. Hardware involved: Dell-branded…