Juniper ACX2000 Configuration Guide

Example: Configuring Hybrid Mode and ESMC Quality Level Mapping
This example shows the configuration of hybrid mode by mapping the PTP clock class
to the ESMC quality level and also by configuring a user-defined mapping of the PTP
clock class to the ESMC quality level on ACX Series Routers.
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Requirements for Hybrid Mode Configuration on page 295
•
Overview on page 295
•
Configuration on page 296
•
Verification on page 298
Requirements for Hybrid Mode Configuration
This example uses the following hardware and software components:
•
One ACX Series router.
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Junos OS Release 12.2R2 or later.
Overview
The combined operation of Synchronous Ethernet and Precision Time Protocol (PTP) is
also known as hybrid mode. In hybrid mode, the synchronous Ethernet equipment clock
(EEC) on the Modular Port Concentrator (MPC) derives the frequency from Synchronous
Ethernet and the phase and time of day from PTP.
You can configure hybrid mode on ACX Series routers. On these routers, the combined
operation is possible only when the PTP slave and the Synchronous Ethernet source are
on the same device and are traceable to the same master. When acting as a PTP slave,
the router can accept any external Synchronous Ethernet clock as reference. Note that
when the selected Synchronous Ethernet reference fails, the router continues to work in
PTP mode.
Hybrid mode is configured on the slave. On the slave, one or more interfaces are configured
as Synchronous Ethernet source interfaces.
NOTE: You can set the values for each parameter according to your
requirement. The values given in this example are for illustration purposes
only.
The ESMC quality level value is mapped to the clock class value either by
mapping the PTP clock class to the ESMC quality level or by configuring a
user-defined mapping of the PTP clock class to the ESMC quality level. The
following examples explain configuring hybrid mode with either of the modes
in detail.
295Copyright © 2017, Juniper Networks, Inc.
Chapter 9: Configuring Timing and Synchronization

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English