Orolia Seven Solutions WR-ZEN Series, Руководство пользователя

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Note: PTP modes on Custom preset: The Custom preset allows to con-
figure any desired interface as PTP master through Web and CLI.
However, PTP slave mode in ethernet ports can only be configured through
the CLI.
5.2.2 Reference topology
The following figure summarizes how devices can be configured with different presets to
operate on a generic timing network. To improve the comprehensibility of the reader, this
reference topology has been separated in several theoretical layers:
Figure 5-9:
Reference topology with different presets.
External Reference Layer: It includes the devices that will be fed by several external
references (in grey), such as an Atomic Clock or a GNSS receiver, and will receive
ToD (Time of Day) from an NTP server (external or embedded). These devices will
act as Grand-Master (GM) in the timing network and their timing information will be
forwarded to all the timing nodes.
The Fan-Out Layer or Middle Layer: The devices in this layer are mainly dedicated to
spread (fan-out) the timing synchronization to more devices on the down layers. In
order to ensure continuous operation, they can be configured with redundant timing
sources (e.g., BC FO wr0-wr1) or could incorporate the Holdover option (e.g., BC
wr0 slave HO).
5.2 General Timing Management
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