A large variety of fiber ethernet PHYs and some copper ethernet PHYs support forced "unidirectional link" modes. Some signalling modes are designed for last-mile ethernet plants while others are designed for strict security isolation (fiber with no return-path).
Unfortunately, this doesn't work with most NIC drivers even if sitting the autoneg off using ethtool. What would be the preferred way to set the TX only mode?
I look forward to your comments and suggestions
