PMA-size training frame for 100GBASE-KP4

摘要

Methods, apparatus and systems for implementing Physical Media Attachment (PMA) alignment and rapid transition from a link training mode to a data mode for next-generation high-speed Ethernet links including a 100 Gbps Ethernet link. Training frames are transmitted between first and second Ethernet interfaces on opposing ends of the link in a pair-wise manner, with a first training frame being sent from a first Ethernet interface and a second training frame being returned from the second Ethernet interface. The training frames have a length that is the same as the length of Physical Media Attachment (PMA) frames, and the returned training frames include receiver readiness status indicia identifying a readiness status of a local receiver port, and countdown data. The readiness status indicia, and countdown data are employed to facilitate a rapid transition from the link training mode to the data mode.

主权项

1. A method for facilitating a transition between a link training mode and a data mode for a high-speed Ethernet link, comprising:
transmitting training frames from a transmitter port of a first component to be received at a receiver port of a second component, the training frames being transmitted using Physical Media Attachment (PMA) framing logic and having the same length as PMA frames to be transmitted during a data mode following the training mode; receiving training frames transmitted from a transmitter port of the second component at a receiving port of the first component, the training frames that are received including receiver readiness status indicia identifying a readiness status of the receiver port of the second component to receive data, and countdown data; and employing the receiver readiness status indicia and the countdown data to facilitate the transition between the link training mode and the data mode.