58 | EdgeSync Manual rev 1 orolia.com
Figure 30 Network Topology - Synchronization Overview
For tighter precision, this method of propagation is changing
with more Grandmasters put in the network path and the
Grandmasters are moving to the edge. Timing and
synchronization over large segments of network has its
challenges, especially when higher layer protocols and traffic
engineering (TE) methods can dynamically re-route traffic
based on network conditions.
With less hops, a good accuracy and precision can be
maintained. Conceptually, this is similar to how low-latency
applications require caching or mirroring of data locally on-
site or at the edge. The figure shows how network dynamic
reconfiguration could impact the sync characteristics at the
end-point (PTP slave).
PTP Profiles
EdgeSync provides the flexibility and ease for customers to select one of the many PTP profiles
provided to set the EdgeSync timing engine mode of operation. In the current release, both ports will
be set to the same profile and not independently.
There are many different PTP profiles that have been specified based on specific industries like
Telecom, Power, Broadcasting, Enterprise, etc. while a few others are being created. These profiles will
put some restrictions on some of the configuration parameters that are part of the IEEE 1588 to make
it simpler and targeted towards specific industry and deployment. Typically, the profile dictates the PTP
domain value range, PTP over L2 (Ethernet) or IP/UDP, multicast or unicast or mixed mode, message
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