A METHOD, APPARATUS AND SYSTEM FOR AVOIDING DATA TO CYCLE IN LOOP IN A RING ETHERNET

摘要

A method for avoiding data to cycle in loop in a ring ethernet. The method includes steps: the transfer node in the ring net detects the failure and then prohibits the user data message transferability of the port in the link which is affected by the failure; the main node accomplishs protection switching after acquiring the ring net failure; the transfer node updates its transfer list and transfers messages according to the updated transfer list; if the failure is eliminated, the main node enters the proper working state, and the transfer node enables the user data message transferability of the port in the link which is affected by the failure. A apparatus and system for avoiding data to cycle in loop in a ring ethernet are also proposed. The probability of data-cycling-in-loop can be effectively decreased or even be entirely avoided.