Edge-Core ECS4660-28F, Руководство по управлению, Страница: 978 / 2020

C
HAPTER
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| System Management Commands
Precision Time Protocol
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Grandmaster Identity A unique 8-octet array based on the IEEE EUI-64
assigned numbers
Grandmaster Clock Quality
Clock Class An attribute defining the clock’s International Atomic
Time (TAI) traceability.
Clock Accuracy An attribute defining the accuracy of the clock
Offset Scaled Log Variance An attribute defining the stability of the clock
Grandmaster Priority1 A preference level used in selecting the grand master
clock
Grandmaster Priority2 A secondary preference level used in selecting the grand
master clock
Time Properties Data Set
Current UTC Offset Current offset between TAI (International Atomic Time)
and UTC (Coordinated Universal Time)
Current UTC Offset Valid Indicates if the current UTC offset is known to be correct
Leap59 Indicates if the last minute of the UTC day contains 59
seconds
Leap61 Indicates if the last minute of the UTC day contains 61
seconds
Time Traceable Indicates if the time scale of value of the current UTC
offset are traceable to a primary reference
Frequency Traceable Indicates if the frequency determining the time scale is
traceable to a primary reference
PTP Timescale Indicates if the clock time scale of the grand master clock
is PTP
Time Source The source of time used by the grand master clock
Port Data Set
Port Identity Port identity information
Clock Identity A unique 8-octet array based on the IEEE EUI-64
assigned numbers
Port Number Port on the local switch
Boundary Clock A clock at the domain boundary used to bridge
synchronization from one network segment to another
Port State Shows if device is in master or slave state
Log Min Delay Req. Interval Delay request message transmit interval (log value)
Peer Mean Path Delay Mean path delay between upstream peer and this device
Announce Receipt Timeout Transmit timeout for PTP announcement messages
Log Announce Interval Announcement message transmit interval (log value)
Log Sync Interval Synchronization message transmit interval (log value)
Delay Mechanism Time delay measurement method (end-to-end or peer-
to-peer)
Log Min Pdelay Req. Interval Peer delay request message transmit interval
Version Number PTP version number (1 or 2)
Table 83: show ptp information - display description for boundary clock
Field Description