Configuring the Time Synchronization Function on an Atom GNSS Module

This section describes how to configure the time synchronization function on an Atom GNSS module so that GNSS time signals can be transmitted to the router where the Atom GNSS module houses through 1588v2 packets and then to downstream devices.

Context

The attributes that can be configured on an Atom GNSS module are the clock domain and priority1 and priority2 of the time source.

The class of a clock source cannot be specified. The initial class 248 is used by default when a clock source goes online. After the clock source successfully traces GNSS signals, its class changes to 6 (a device using a class-6 clock source cannot be the secondary devices of other clocks in the clock domain). After the clock source loses track of GNSS signals, its class changes to 248 again.
The accuracy of a clock source cannot be specified. The initial value 0xFE is used by default when a clock source goes online. After the clock source successfully traces GNSS signals, its accuracy changes to 0x21 (specific to 100 ns). After the clock source loses track of GNSS signals, its class changes to 0xFE again.
The stability of a clock source cannot be configured. The value is 0xFFFF (if T-GM is not connected to ePRTC).

Perform the following operations on the router where the Atom GNSS module houses:

Procedure

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
Run smart-clock gnss-model { gps | glonass | beidou | gps-glonass | gps-beidou } [ gps | glonass | beidou | gps-glonass | gps-beidou ] [ gps | glonass | beidou | gps-glonass | gps-beidou ] [ gps | glonass | beidou | gps-glonass | gps-beidou ] [ gps | glonass | beidou | gps-glonass | gps-beidou ]
The mode in which the multi-mode smart clock module on a GE optical interface works is configured.
Run smart-clock cable-delay delay-value
The feeder delay compensation value for the smart clock module of a GE optical interface is configured.
(Optional) Run smart-clock leap manual-mode enable
Configure the multi-mode smart clock model on a GE optical interface to obtain leap seconds in manual mode.
(Optional) Run smart-clock leap current-leap current-leap-value [ { leap59 | leap61 } date date ]
Configure the current leap second value of the multi-mode smart clock module as well as the direction and date of the next leap second adjustment.
(Optional) Run smart-clock ptp domain domain-value
A clock domain is configured for the Atom GNSS module.
(Optional) Run smart-clock ptp { priority1 priority1-value | priority2 priority2-value }
Priority 1 or priority 2 of the time source is configured for the Atom GNSS module.
Run commit
The configuration is committed.