HIGH-SPEED LINK SELF-NEGOTIATION METHOD AND SINGLE BOARD

摘要

A high-speed link self-negotiation method and single board are disclosed, which belong to the field of high-speed Ethernet. The method includes: a first single board and a second single board set the port speed to a common speed supported by both the first single board and the second single board; the first single board sends a first self-negotiation message, which carries the speed supported by the first single board, to the second single board according to the common speed, so as to make the second single board determine, according to the speed supported by the first single board and the speed supported by the second single board, the highest speed supported by both the first single board and the second single board and set the port speed to the highest speed; the first single board receives a second self-negotiation message which is sent by the second single board according to the common speed and carries the speed supported by the second single board; according to the speed supported by the first single board and the speed supported by the second single board, the first single board determines the highest speed supported by both the first single board and the second single board and sets the port speed to the highest speed. The present invention can implement the self-negotiation mechanism by messages and have no need of specific hardware support, and can support dynamic switching of speeds at the same time.