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show chassis synchronization

Syntax

show chassis synchronization<extensive><backup | master>

Release Information

Command introduced in Junos OS Release 7.6 for M320 routers.

Command introduced in Junos OS Release 8.3 for M40e routers.

Command introduced in Junos OS Release 9.3 for M120 routers.

Command introduced in Junos OS Release 10.2 for T320, T640, and T1600 routers.

Command introduced in Junos OS Release 12.1 for PTX Series Packet Transport Routers.

Command introduced in Junos OS Release 12.2 for ACX Series routers.

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

extensive
—

(Optional) Display clock synchronization information in detail.

backup
—

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

master
—

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

Required Privilege Level

maintenance

 

Related Documentation

 

List of Sample Output

show chassis synchronization
show chassis synchronization master
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 extensive (ACX Series Routers)

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.
  • master—Source is currently the master clock source.
  • Online-Master—(PTX Series Packet Transport Routers) Source is the master 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 master CB—(M320, M40e, and M120 routers) Source is locked to master clock source.
  • locked to master SCG—(T320, T640, and T1600 routers) Source is locked to master clock source.
  • locked to master CCG—(PTX Series Packet Transport Routers) Source is locked to master clock source.

Selected for

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

Selected since

Timestamp for establishment as master or backup clock source.

Deviation (in ppm)

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

Last deviation (in ppm)

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

Configured sources

Information about clock sources eligible for selection as master 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

user@host> show chassis synchronization
Clock Synchronization Status :
  Clock module on CB 0
    Current state            : master
    Current clock state      : internal
      Selected for           : 18 hours, 12 minutes, 43 seconds
      Selected since         : 2008-09-10 03:27:47 PDT
      Deviation (in ppm)     : +0.00
      Last deviation (in ppm): +0.00
Clock Synchronization Status :
  Clock module on CB 1
    Current state            : backup
    Current clock state      : locked to master CB
      Selected for           : 1 day, 12 hours, 49 minutes, 20 seconds
      Selected since         : 2008-09-09 08:51:10 PDT

show chassis synchronization master

user@host> show chassis synchronization master
Clock Synchronization Status :
  Clock module on CB 0
    Current state            : master
    Current clock state      : internal
      Selected for           : 8 days, 21 minutes, 12 seconds
      Selected since         : 2008-08-27 21:05:40 PDT
      Deviation (in ppm)     : +0.00
      Last deviation (in ppm): +0.00

show chassis synchronization backup

user@host> show chassis synchronization backup
Clock Synchronization Status :
  Clock module on CB 1
    Current state            : backup
    Current clock state      : locked to master CB
      Selected for           : 34 days, 20 hours, 17 minutes, 8 seconds
      Selected since         : 2008-08-01 01:22:16 PDT

show chassis synchronization extensive

user@host> show chassis synchronization extensive
Clock Synchronization Status :
  Clock module on CB 0
    Current state            : master
    Current clock state      : internal
      Selected for           : 8 days, 36 minutes, 29 seconds
      Selected since         : 2008-08-27 21:05:40 PDT
      Deviation (in ppm)     : +0.00
      Last deviation (in ppm): +0.00
Clock Synchronization Status :
  Clock module on CB 1
    Current state            : backup
    Current clock state      : locked to master CB
      Selected for           : 34 days, 20 hours, 19 minutes, 53 seconds
      Selected since         : 2008-08-01 01:22:16 PDT

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

user@host> show chassis synchronization
    Clock Synchronization Status :
      Clock module on SCG 0
        Current state            : master
        Current clock state      : locked to external-a
          Selected for           : 2 hours, 28 minutes, 4 seconds
          Selected since         : 2006-02-17 01:12:58 PST
        Configured sources
          Source      Priority   Deviation    Last deviation   Status
                                 (in ppm)     (in ppm)
          external-a  primary    measuring    -0.10            in-use
          external-b  secondary  -0.10        -0.10            qualified
    Clock Synchronization Status :
      Clock module on SCG 1
        Current state            : backup
        Current clock state      : locked to master SCG
          Selected for           : 19 hours, 49 minutes, 14 seconds
          Selected since         : 2006-02-16 07:51:48 PST
        Configured sources
          Source      Priority   Deviation    Last deviation   Status
                                 (in ppm)     (in ppm)
          external-a  primary    -0.25        -0.25            qualified
          external-b  secondary  -0.25        -0.25            qualified

show chassis synchronization (PTX Series Packet Transport Routers)

user@host> show chassis synchronization
Clock Synchronization Status :
  Clock module on CCG 0
    Current state            : Online - Master
    Current clock state      : internal
      Selected for           : 1 hour, 24 minutes, 21 seconds
      Selected since         : 2011-03-21 15:59:37 PDT
      Deviation (in ppm)     : +0.51
      Last deviation (in ppm): +0.51
Clock Synchronization Status :
  Clock module on CCG 1
    Current state            : Online - Standby
    Current clock state      : locked to master CCG
      Selected for           : 1 hour, 39 minutes, 12 seconds
      Selected since         : 2011-03-21 15:44:46 PDT

show chassis synchronization extensive (ACX Series Routers)

user@host> show chassis synchronization extensive
Current clock status  : Locked
Clock locked to       : Primary
Configured sources:
Interface           : ce1-0/0/4
Status              : Primary                      Index       : 132
Clock source state  : Clk qualified   Priority    : Default(8)
Configured QL       : PRC                   ESMC QL     : Unknown
Clock source type   : ifd                    Clock Event : Clock locked
Kernel flags        : Up,pri,

Published: 2013-07-24

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