PTP Statistics

The 7705 SAR provides the capability to collect statistics, state, and events data for the PTP slave clock’s interaction with PTP peer clock 1 and PTP peer clock 2. This data is collected separately for each peer clock and can be displayed using the show system ptp clock ptp-port command. This data can be used to monitor the PTP slave clock performance in relation to the peer clocks and to diagnose a problem or analyze the performance of a packet switched network for the transport of synchronization messages. The following data is collected:

PTP peer-1/PTP peer-2 statistics:

• number of signaling packets

• number of unicast request announce packets

• number of unicast request announce timeouts

• number of unicast request announce packets rejected

• number of unicast request synchronization packets

• number of unicast request synchronization timeouts

• number of unicast request synchronization packets rejected

• number of unicast request delay response packets

• number of unicast request delay response packets timeouts

• number of unicast request delay response packets rejected

• number of unicast grant announce packets

• number of unicast grant announce packets rejected

• number of unicast grant synchronization packets

• number of unicast grant synchronization packets rejected

• number of unicast grant delay response packets

• number of unicast grant delay response packets rejected

• number of unicast cancel announce packets

• number of unicast cancel synchronization packets

• number of unicast cancel delay response packets

• number of unicast acknowledge cancel announce packets

• number of unicast acknowledge cancel synchronization packets

• number of unicast acknowledge cancel delay response packets

• number of announce packets

• number of synchronization packets

• number of follow-up packets

• number of delay response packets

• number of delay request packets

• number of out-of-order synchronization packets

• total number of UDP (port 320) packets

• total number of UDP (port 319) packets

• number of alternate master packets discarded

• number of bad domain packets discarded

• number of bad version packets discarded

• number of duplicate messages packets discarded

• number of step RM greater than 255 discarded

PTP master-1/PTP master-2 algorithm state statistics (in seconds):

• number of free-run states

• number of acquiring states

• number of phase-tracking states

• number of hold-over states

• number of locked states

PTP master-1/PTP master-2 algorithm event statistics:

• number of excessive frequency errors detected

• number of excessive packet losses detected

• number of packet losses spotted

• number of excessive phase shifts detected

• number of high PDVs detected

• number of synchronization packet gaps detected