> The DeLock board is this beauty: > http://www.delock.de/produkte/G_89481/merkmale.html?setLanguage=en > DeLock techsupport were so kind as to provide me with a schematic > snippet, showing the wiring of the i210 fiber SKU's dedicated > I2C/MDIO pins to the SFP socket's standard I2C pins. There are > pull-up resistors on the board for SDA/SCL. Nothing outright custom > here - more likely close to some Intel reference design. The board > works just fine.
I would suggest you ignore MDIO and try looking on the I2C bus. Does ethtool -m show anything useful? Andrew