Forcibly Specifying A Reference Clock Source For The Main Control Board - Huawei Quidway S9300 Configuration Manual

Quidway S9300 Terabit Routing Switch
Configuration Guide - Device Management
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Pre-configuration Tasks
Before forcibly specifying a clock source, complete the following tasks:
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Data Preparation
To forcibly specify a clock source, you need the following data.
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11.3.2 Forcibly Specifying a Reference Clock Source for the Main
Control Board
You can forcibly specify a reference clock source by using a certain command.
Context
Do as follows on the S9300.
Issue 03 (2011-12-29)
When you forcibly specify a clock source to replace the original clock source of the system
clock:
– If the specified clock source is in Signal-fail state, the system automatically uses the
inner clock as the clock source.
– When the specified clock source recovers, the system automatically uses this clock
source as the clock source.
When you forcibly specify a clock source to replace the original clock source of a BITS
clock:
– If the specified clock source is in Signal-fail state, the BITS clock automatically uses
the system clock as the clock source.
– When the specified clock source recovers, the BITS clock automatically uses this clock
as the clock source.
Setting parameters of the link layer protocol and IP addresses for the interfaces to ensure
that the link layer protocol on the interfaces is in Up state
Configuring the routing protocol to make the IP routes between the nodes reachable
Ensuring the clock that will be configured to meet the following conditions:
– All clock sources provide valid clock signals.
– The result of frequency offset check does not affect clock source selection or the
frequency offset of the clock sources is within the specified range.
– The clock sources are not locked.
– The priority of the clock is other than 255 (DIS) so that the clock can function as the
clock source.
Data
Clock for which you want to forcibly select the clock source, namely, the system
clock, BITS0 clock, or BITS1 clock
Number of the new clock source (You can view the number of each clock source by
running the display clock description command.)
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11 Ethernet Clock Syntonization Configuration
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