only the port id, but also so-called "extensions". The only documented
extension so-far in the specification is the inclusion of timestamps, for
PTP-enabled PHYs. This mode isn't compatible with QSGMII, but offers the
only the port id, but also so-called "extensions". The only documented
extension so-far in the specification is the inclusion of timestamps, for
PTP-enabled PHYs. This mode isn't compatible with QSGMII, but offers the