Tang Yonglin1, Ma Hong2. Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet[J]. 2013,(3):26-28. DOI: 10.13756/j.gtxyj.2013.03.012.
In order to avoid clock loop in case of multiple types of clock failures in Sync Ethernet
Ethernet Synchronization Messaging Channel(ESMC) messages are extended.On the basis of using the reserved bytes in ESMC messages to transmit the Clock Source ID(CSID) and recording Clock Source Time To Live(CSTTL)
the extended Synchronization Status Message(eSSM) algorithm is presented.This algorithm can not only effectively avoid clock loop in case of multiple types of clock failures
but also optimize clock tree and improve clock performance.