Configuration Concept
1.
On the OLT side, select the clock signal recovered from 1588v2 packets as the system clock
source.
2.
The system clock is issued to the ONU through the optical path of the PON service board.
3.
The ONU uses the 1588v2 clock of the PON upstream port as the system clock.
4.
The Tx clock of the GE port on the ONU is synchronized to the system clock of the ONU.
5.
The ONU synchronizes the clock and time with the base station in the following three
modes:
l
The ONU transmits 1588v2 packets to the base station by using the GE port.
l
The ONU provides independent time signals to the base station by using the clock output
interface.
Procedure
l
Configure the OLT-side clock.
1.
Configure the global 1588v2 function.
Run the
ptp enable
command to enable 1588v2 on a device.
huawei(config)#
ptp enable
(Optional) Run the
ptp domain
command to configure a 1588v2 time domain.
Each time domain supports only one clock source. All the devices in the 1588v2 time
domain are synchronized with the clock source. Ensure that the time domain of an
MDU is the same as that of the optical line terminal (OLT).
huawei(config)#
ptp domain 1
2.
Configure the system clock source and time synchronization (frequency
synchronization).
a.
Run the command to configure the index of the system clock source.
The clock source can be the synchronous clock recovered from a GE or 10 GE
line on the network side, 1588v2 clock, or BITS clock.
When the network supports synchronous Ethernet clock, the clock is
recommended.
b.
Run the
clock priority system
command to set the priority of the clock source.
A device may trace multiple clock sources for synchronizing the clock. It selects
the clock source with the highest priority as the clock source.
c.
Optional:
Configure the mode for dynamically selecting the system clock
source.
The system supports static and dynamic selection. When dynamic selection is
required based on Synchronization Status Message (SSM), run the
clock ql-
mode enable
command to enable the SSM selection mode.
–
If the GICK board is used to access the 1588v2 clock source:
huawei(config)#
clock source 0 0/19/0
huawei(config)#
clock source 1 0/19/1
huawei(config)#
clock priority system 0/1
–
If the SPUF board is used to access the 1588v2 clock source:
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
14 FTTM Configuration (Base Station Access)
Issue 01 (2014-04-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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