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show chassis synchronization

Syntax

Syntax (on ACX500 Series)

Syntax (on EX9251 Switches)

Description

(ACX Series, M320, M40e,M120, T320, T640, and T1600 routers and PTX Series Packet Transport Routers only) Display information about the external clock source currently used for chassis synchronization.

Options

clock-module

Display clock module information. You can optionally specify one of these Routing Engine qualifiers:

re0

Routing Engine 0

re1

Routing Engine 1

routing-engine (backup | both | local | master | other)

Routing Engine type

extensive

(Optional) Display clock synchronization information in detail.

interface interface-name

(Optional) Display clock synchronization information for the specified interface.

backup

(Optional) Display clock synchronization information about the backup clock.

master

(Optional) Display clock synchronization information about the primary clock.

Required Privilege Level

maintenance

Output Fields

Table 1 lists the output fields for the show chassis synchronization command. Output fields are listed in the approximate order in which they appear.show chassis synchronizationshow chassis synchronizationshow chassis synchronization

Table 1: show chassis synchronization Output Fields

Field Name

Field Description

Current state

Indicates current status of external clock sources:

  • backup—Source is currently the backup clock source.

  • primary—Source is currently the primary clock source.

  • Online-Primary—(PTX Series Packet Transport Routers) Source is the primary clock. Source is online.

  • Online-Standby—(PTX Series Packet Transport Routers) Source is the standby (backup) clock. Source is online.

Current clock state

Indicates current source of external synchronization:

  • internal—Source is providing its own clocking.

  • locked to primary CB—(M320, M40e, and M120 routers) Source is locked to primary clock source.

  • locked to primary SCG—(T320, T640, and T1600 routers) Source is locked to primary clock source.

  • locked to primary CCG—(PTX Series Packet Transport Routers) Source is locked to primary clock source.

SNMP trap status

Denotes the SNMP trap generation status (Enabled or Disabled) on ACX Series routers.

Selected for

Number of seconds this clock has been the primary or backup clock source.

Selected since

Timestamp for establishment as primary or backup clock source.

Deviation (in ppm)

Difference in clock timing, in parts per million (ppm).

Note:

Starting in Junos OS Release 16.1R2, if the clock source is locked and the deviation exceeds 10 ppm, the status of the configured source is displayed in the command output as in-use. This status indicates that the clock source is locked even though the clock has significant deviation.

Last deviation (in ppm)

Previous difference in clock timing, if any, in ppm.

Configured sources

Information about clock sources eligible for selection as primary clock.

Source

Information about external clock sources.

Priority

Indicates priority of external clock sources:

  • primary—Source is a primary reference.

  • secondary—Source is a secondary reference.

Deviation (in ppm)

Current difference in clock timing, in ppm:

  • measuring—Establishing source deviation.

  • number—Deviation in ppm.

Last deviation (in ppm)

Previous difference in clock timing, in ppm:

  • number—Deviation in ppm.

Status

Indicates status of external sources:

  • present—Source is configured and present.

  • qualified—Source is eligible for synchronization source.

Sample Output

show chassis synchronization

show chassis synchronization primary

show chassis synchronization backup

show chassis synchronization extensive

show chassis synchronization (T320, T640, and T1600 Routers)

show chassis synchronization (PTX Series Packet Transport Routers)

show chassis synchronization clock-module (PTX Series Packet Transport Routers)

This following sample output displays the status of configured sources as in-use#. This status indicates that the clock source is locked even though the clock has significant deviation in timing.

show chassis synchronization extensive (ACX Series Routers)

show chassis synchronization extensive with extended ESMC QL

show chassis synchronization extensive (ACX500 Series Routers)

show chassis synchronization gnss (ACX500 Series Routers)

show chassis synchronization gnss extensive (ACX500 Series Routers)

show chassis synchronization clock-module (EX9251 Switches)

Show chassis synchronization (external 1pps) (ACX710 Router)

Show chassis synchronization gru extensive (ACX710 Router)

Show chassis synchronization gru (ACX710 Router)

Release Information

Command introduced in Junos OS Release 7.6.