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Configuration Guide - Device Management

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of Device Management, including device status query, hardware management, Information Center Configuration, NTP, Synchronous Ethernet Configuration, Fault Management Configuration, Energy-Saving Management Configuration, Performance Management Configuration, Maintenance Assistant Configuration, and OPS Configuration.
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Configuring Manual or Forcible Clock Source Selection

Configuring Manual or Forcible Clock Source Selection

Context

By default, the system uses the automatic clock source selection algorithm to determine the clock source to trace. You can also manually or forcibly specify a clock source to trace based on the quality level of clock sources.

You can manually or forcibly specify a clock source for the system clock, 2M synchronous PLL-1, or 2M synchronous PLL-2 to trace. You can specify only a line clock source for 2M synchronous PLL-1 or 2M synchronous PLL-2.

  • In manual clock source selection mode:
    • The manually specified clock source takes effect only when it is in normal or holdoff state and has the highest SSM quality level.
    • After the manually specified clock source becomes invalid, the switch uses the automatic clock source selection mode. After the manually specified clock source recovers, the switch does not change to the manual clock source selection mode. After the switch is restarted, it returns to the automatic clock source selection mode.
  • In forcible clock source selection mode:
    • Clock synchronization must have been enabled for the forcibly specified clock source.
    • The system clock enters the lock state only when the forcibly specified clock source is in normal state and its SSM quality level is not DNU. Otherwise, the system clock enters the hold state.
    • After the forcibly specified clock source becomes invalid, the system clock enters the hold state. After it recovers, the system clock traces it again. After the switch is restarted, the switch still uses the forcible clock source selection mode.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run clock { manual | force } [ 2msync-1 | 2msync-2 ] source interface interface-type interface-number

    A clock source is manually or forcibly specified for 2M synchronous PLL-1 and 2M synchronous PLL-2.

    By default, 2M synchronous PLL-1 and 2M synchronous PLL-2 use the automatic clock source selection algorithm to determine the clock source to trace.

  3. Run clock { manual | force } source { [ chassis chassis-id ] bits0 [ slot slot-id ] | ptp | interface interface-type interface-number }

    A clock source is manually or forcibly specified for the system clock.

    By default, the system uses the automatic clock source selection algorithm to determine the clock source to trace.

  4. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074722

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