Edge-Core ECS4660-28F, Руководство по управлению, Страница: 594 / 2020

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| Basic Administration Protocols
PTP Configuration
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To display the results of remote loop back testing for each port for which
this information is available:
1.
Click Administration, OAM, Remote Loop Back.
2.
Select Show Test Result from the Action list.
Figure 329: Displaying the Results of Remote Loop Back Testing
PTP C
ONFIGURATION
Precision Time Protocol (PTP) provides high-precision time synchronization
at an accuracy within the sub-microsecond range. PTP Version 2 (based on
IEEE 1588-2008) is used to provide clock synchronization for measurement
and control systems in a local area network.
PTP uses a hierarchical master-slave architecture for clock distribution,
where the distribution system consists of one or more network segments,
and one or more clocks. An ordinary clock has a single network connection
and is either the source of (i.e., master) or destination for (i.e, slave) a
synchronization reference. A boundary clock has multiple network
connections and can accurately bridge time synchronization from one
network segment to another. A synchronization master is elected for each
network segment in the system. The root timing reference is called the
grandmaster. The grandmaster transmits synchronization information to
the clocks residing on its network segment. The boundary clocks on that
segment then relay accurate time to the other segments to which they are
also connected.