Connecting To A Ptp Source; Initial Setup - Imagine communications Selenio SNP-GW-3GX32 User Manual

Selenio™ Network Processor
User Guide

Connecting to a PTP Source

To connect to a Precision Time Protocol (PTP) IEEE-1588 source, note the following:
The 1588 standard assumes symmetrical path delay. If you have different rate paths (E.g. VSG-4MTG at
100Mbps and SNP at 10G), the One Way Delay (OWD) calculation is incorrect. Two parameters allow
SNP to compensate for this error: Network from master/boundary clock and OWD Offset, listed in
(on page 54).
To configure these parameters, follow these steps in SNP Manager:
1. From the main menu, choose Tools > Configure Element.
2. Select the Reference tab, and under PTP > Configuration, select the Network from
Master/Boundary Clock option that best describes your network configuration.
This parameter makes an OWD calculation based on an assumption of how the switch behaves
internally. Not all switches will always behave this way.
3. Using a PTP master with a 2059-1 aligned black output, measure the relative timing (in
microseconds) of the SNP SDI output to the PTP master's black output. E.g. WFM8300.
4. Enter this value in the OWD Offset control, which is also found under Configure Element >
Reference > PTP > Configuration.

Initial Setup

The SNP ships with a default IP address, gateway, and subnet mask. You should change these settings so
they are appropriate to your network.
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Installation
PTP
May 2019 | Page 26