3.11.6. miitool - view media-independent interface status Usage

miitool [-vsr] Synopsis

This utility checks or sets the status of a network interface’s Media Independent Interface (MII) unit as well as allowing to register dummy PHY devices for raw MDIO access. Most fast ethernet adapters use an MII to autonegotiate link speed and duplex setting. Options

-v increase verbosity
-s <devname> show PHY status (not providing PHY prints status of all)
-r <busno>:<adr>
register a PHY