show chassis synchronization

Syntax

show chassis synchronization <extensive><backup | master>

Release Information

Command introduced in JUNOS Release 7.6 for M320 routers.

Command introduced in JUNOS Release 8.3 for M40e routers.

Command introduced in JUNOS Release 9.3 for M120 routers.

Description

(M320, M40e, and M120 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

List of Sample Output

show chassis synchronization
show chassis synchronization master
show chassis synchronization backup
show chassis synchronization extensive

Output Fields

Table 95 lists the output fields for theshow chassis synchronization command. Output fields are listed in the approximate order in which they appear.

Table 95: 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.
Current clock state	Indicates current source of external synchronization: internal—Source is providing its own clocking. locked to master CB—Source is locked to master clock source.
Selected for	Number of seconds this clock has been the master or backup clock source.
Selected since	Time stamp 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 of clock sources eligible for selection as master clock.
Source	Information following concerns external source A or B.
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