Example: Configuring Hybrid Mode And Esmc Quality Level Mapping - Juniper ACX1000 Configuration Manual

Example: Configuring Hybrid Mode and ESMC Quality Level Mapping

Requirements for Hybrid Mode Configuration
Overview
Copyright © 2017, Juniper Networks, Inc.
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.
Requirements for Hybrid Mode Configuration on page 295
Overview on page 295
Configuration on page 296
Verification on page 298
This example uses the following hardware and software components:
One ACX Series router.
Junos OS Release 12.2R2 or later.
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.
Chapter 9: Configuring Timing and Synchronization
295