METHOD AND SYNCHRONIZING CLOCK PROVING SYSTEM FOR SETTING MASTER CLOCK SOURCE FOR N+1 REDUNDANT SWITCH FABRICS CARD

摘要

Provided are a method for setting a master clock source in a switch fabric card having a N+1 multiplexing structure and a system for providing a synchronous clock. The method for setting a master clock source may transition a state of a clock source to any among a master, a pre-master and a slave according to a state of the clock source, and the clock source switching mode, depending on whether the clock source is valid or not, and according to a priority of the clock source.