show chassis synchronization
Syntax
show chassis synchronization <clock-module> <(re0 | re1 | routing-engine (backup | both | local | master | other))>> <extensive> <backup | master> <interface interface-name>
Syntax (on ACX500 Series)
show chassis synchronization <gnss> <extensive> <backup | master>
Syntax (on EX9251 Switches)
show chassis synchronization <clock-module <extensive> <interface interface-name>
Description
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:
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| extensive | (Optional) Display clock synchronization information in detail. |
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| interface interface-name | (Optional) Display clock synchronization information for the specified interface. |
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| backup | (Optional) Display clock synchronization information about the backup clock. |
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| 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
Field Name |
Field Description |
|---|---|
Current state |
Indicates current status of external clock sources:
|
Current clock state |
Indicates current source of external synchronization:
|
|
Current clock status |
Indicates current status of the clock. |
|
Clock locked to |
Indicates the source the clock is locked to. |
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 |
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:
|
Deviation (in ppm) |
Current difference in clock timing, in ppm:
|
Last deviation (in ppm) |
Previous difference in clock timing, in ppm:
|
Status |
Indicates status of external sources:
|
Sample Output
- show chassis synchronization
- show chassis synchronization extensive
- show chassis synchronization (PTX Series Packet Transport Routers)
- show chassis synchronization clock-module (PTX Series Packet Transport Routers)
- show chassis synchronization clock-module extensive (PTX10008)
- 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 extensive (PTX10008)
- show chassis synchronization gnss (ACX500 Series Routers)
- show chassis synchronization gnss extensive (ACX500, ACX7024, ACX7332, ACX7348)
- show chassis synchronization clock-module (EX9251 Switches)
- Show chassis synchronization (external 1pps) (ACX710 Router)
- show chassis synchronization clock-module (ACX7100 Router)
- show chassis synchronization clock-module (ACX Series)
- show chassis synchronization extensive (AFTS enabled)
- show chassis synchronization clock-module (AFTS enabled)
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 PDTshow 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 PDTshow 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 clock-module (PTX Series Packet Transport Routers)
user@host> show chassis synchronization clock-module
re0:
--------------------------------------------------------------------------
Clock Synchronization Status :
Clock module on CCG 0
Current state : Online - Master
Current clock state : locked to bits-a
Selected for : 1 minute, 24 seconds
Selected since : 2015-06-22 15:01:33 PDT
Deviation (in ppm) : unknown
Last deviation (in ppm): unknown
Configured sources
Source Priority Deviation Last deviation Status
ro (in ppm) (in ppm)
bits-a primary unknown unknown unknown
fpc-2 secondary unknown unknown unknown
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, 52 seconds
Selected since : 2015-06-22 13:23:05 PDT
Deviation (in ppm) : unknown
Last deviation (in ppm): unknown
Configured sources
Source Priority Deviation Last deviation Status
(in ppm) (in ppm)
bits-a primary unknown unknown unknown
fpc-2 secondary unknown unknown unknown
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.
user@host> show chassis synchronization clock-module
re0:
--------------------------------------------------------------------------
Clock Synchronization Status :
Clock module on CB 0
Current state : Online - Master
Current clock state : locked to fpc-12
Selected for : 7 seconds
Selected since : 2016-08-16 09:39:07 PDT
Deviation (in ppm) : 10.00
Last deviation (in ppm): 8.75
Configured sources
Source Priority Deviation Last deviation Status
(in ppm) (in ppm)
fpc-12 primary 10.00 8.75 in-use#
show chassis synchronization clock-module extensive (PTX10008)
user@host> show chassis synchronization clock-module extensive
Clock module on SCB-1
Current role : master
Current state : locked to et-6/0/16:2
State for : 0 days, 00 hrs, 07 mins, 36 secs
State since : Thu May 6 18:50:50 2021
Monitored clock sources
Interface Type Status
et-6/0/16:2 syncE-hybrid qualified-selected
show chassis synchronization extensive (ACX Series Routers)
user@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Enabled Configured sources: Interface : ge-0/0/7 Status : Secondary Index : 136 Clock source state : Clk qualified Priority : 3 Configured QL : SEC ESMC QL : PRC Clock source type : ifd Clock Event : Clock qualified Interface State : Up,sec,ESMC Rx(SSM 0x2),ESMC TX(QL PRC/SSM 0x2), Interface : ge-0/1/1 Status : Primary Index : 138 Clock source state : Clk qualified Priority : 2 Configured QL : SEC ESMC QL : PRC Clock source type : ifd Clock Event : Clock locked Interface State : Up,pri,ESMC Rx(SSM 0x2),ESMC TX(QL DNU/SSM 0xf)
show chassis synchronization extensive with extended ESMC QL
user@host>show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Disabled Configured sources: Interface : et-0/0/0 Status : n/a Index : 1215 Clock source state : n/a Priority : Default(8) Configured QL : PRC ESMC QL : eEEC Clock source type : ifd Clock Event : n/a Wait-to-restore : 5 min Hold-off : 1000 ms Interface State : Up,ESMC Rx(QL eEEC/SSM 0x22),ESMC TX(QL eEEC/SSM 0x22), Originator Clock Id : 2001:db8:1:lh::n/64 Cascaded eEECs : 1 Cascaded EECs : 0 Mixed EEC/eEEC : Yes Partial Chain : Yes Ineligibility reason: Undefined/invalid QL,System initialization in progress Interface : et-0/0/2 Status : Primary Index : 1217 Clock source state : Clk qualified Priority : Default(8) Configured QL : eEEC ESMC QL : eEEC Clock source type : ifd Clock Event : Clock locked Wait-to-restore : 5 min Hold-off : 1000 ms Interface State : Up,pri,ESMC Rx(QL eEEC/SSM 0x22),ESMC TX(QL DNU/SSM 0xf), Originator Clock Id : 2001:db8:1:lh::n/64 Cascaded eEECs : 1 Cascaded EECs : 0 Mixed EEC/eEEC : Yes Partial Chain : Yes Interface : et-0/0/8 Status : n/a Index : 1223 Clock source state : n/a Priority : 1 Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : n/a Wait-to-restore : 5 min Hold-off : 1000 ms Interface State : Up,ESMC TX(QL eEEC/SSM 0x22), Ineligibility reason: Undefined/invalid QL,System initialization in progress
show chassis synchronization extensive (ACX500 Series Routers)
user@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary Configured ports: Name : gnss Current ToD : Mon Aug 10 08:50:52 2015 Last ToD update : Mon Aug 10 08:50:51 2015 GPS receiver status : Synchronized UTC Pending : FALSE UTC Offset : 36 One PPS status : Active
show chassis synchronization extensive (PTX10008)
user@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Disabled Configured sources: Interface : et-6/0/16:2 Status : Primary Index : 1035 Clock source state : Clk qualified Priority : Default(8) Configured QL : PRC ESMC QL : PRC Clock source type : ifd Clock Event : Clock locked Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Up,pri,ESMC Rx(QL PRC/SSM 0x2),ESMC TX(QL DNU/SSM 0xf)
show chassis synchronization gnss (ACX500 Series Routers)
user@host> show chassis synchronization gnss Receiver Status : Good Constellation : GPS & GLONASS Cable delay compensation : 0 Antenna Status : GPS Antenna Good
show chassis synchronization gnss extensive (ACX500, ACX7024, ACX7332, ACX7348)
user@host> show chassis synchronization gnss extensive Receiver Status : Good Constellation : GPS & GLONASS Cable delay compensation : 0 Antenna Status : GPS Antenna Good Position : 12 56' 35.740410'' N : 77 41' 32.228191'' E Altitude : 841 meters Number of satellites : 17 Satellite List: Sat No Signal Level Status Type Mode(T=Timing/P=Position) 17 34 dBHZ Acquired GPS T,P 24 38 dBHZ Acquired GPS T,P 12 31 dBHZ Acquired GPS T,P 2 37 dBHZ Acquired GPS T,P 5 48 dBHZ Acquired GPS T,P 20 35 dBHZ Acquired GPS T,P 28 42 dBHZ Acquired GPS T,P 6 40 dBHZ Acquired GPS T,P 71 41 dBHZ Acquired GLONASS T,P 70 46 dBHZ Acquired GLONASS T,P 76 36 dBHZ Acquired GLONASS T,P 75 45 dBHZ Acquired GLONASS T,P 72 40 dBHZ Acquired GLONASS T,P 15 18 dBHZ Acquired GPS NONE 13 36 dBHZ Acquired GPS NONE 74 41 dBHZ Acquired GLONASS NONE 77 19 dBHZ Acquired GLONASS NONE
show chassis synchronization clock-module (EX9251 Switches)
user@switch> show chassis synchronization clock-module re0: -------------------------------------------------------------------------- Clock module on SCB0 Current role : master
Show chassis synchronization (external 1pps) (ACX710 Router)
user@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Enabled Configured sources: Interface : ge-0/1/1 Status : Primary Index : 138 Clock source state : Clk qualified Priority : 2 Configured QL : SEC ESMC QL : PRC Clock source type : ifd Clock Event : Clock locked Interface State : Up,pri,ESMC Rx(SSM 0x2),ESMC TX(QL DNU/SSM 0xf)
show chassis synchronization clock-module (ACX7100 Router)
user@host> Show chassis synchronization clock-module
Clock module on SCB0
Current role : master
Current state : freerun
State for : 0 days, 09 hrs, 40 mins, 54 secs
State since : Tue Aug 6 23:57:51 2024
show chassis synchronization clock-module (ACX Series)
user@host> show chassis synchronization clock-module
Clock module on SCB0
Current role : master
Current state : freerun
State for : 0 days, 09 hrs, 40 mins, 54 secs
State since : Tue Aug 6 23:57:51 2024
show chassis synchronization extensive (AFTS enabled)
With GNSS active: root@host> show chassis synchronization extensive Current clock status : LOCKED Clock locked to : Primary SNMP trap status : Disabled Configured ports: Name : gnss-rx-0 Current ToD : Thu Mar 27 06:16:32 2025 PDT Last ToD update : Thu Mar 27 06:16:31 2025 PDT GPS receiver status : Synchronized UTC Pending : FALSE UTC Offset : 37 One PPS status : Active Configured sources: Interface : et-0/0/12 Status : n/a Index : 1227 Clock source state : n/a Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : n/a Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Dn, Ineligibility reason: Link Down, Interface : et-0/0/13 Status : Primary Index : 1228 Clock source state : Clk qualified Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : Clock qualified Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Up,pri,ESMC TX(QL SEC/SSM 0xb), In case of GNSS failure: root@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Disabled Configured sources: Interface : et-1/0/0 Status : Primary Index : 1280 Clock source state : Clk qualified Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : Clock locked Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Up,pri,ESMC TX(QL DNU/SSM 0xf), When GNSS is active with PTP over LAG enabled: root@host> show chassis synchronization extensive Current clock status : LOCKED Clock locked to : Primary SNMP trap status : Disabled Configured ports: Name : gnss-rx-0 Current ToD : Thu Mar 27 06:16:32 2025 PDT Last ToD update : Thu Mar 27 06:16:31 2025 PDT GPS receiver status : Synchronized UTC Pending : FALSE UTC Offset : 37 One PPS status : Active Configured sources: Interface : et-0/0/12 SyncE Bundle: ae0 Status : n/a Index : 1227 Clock source state : n/a Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : n/a Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Dn, Ineligibility reason: Link Down, Interface : et-0/0/13 Status : Primary Index : 1228 Clock source state : Clk qualified Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : Clock qualified Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Up,pri,ESMC TX(QL SEC/SSM 0xb), In case of GNSS failure when PTP over LAG is enabled: root@host> show chassis synchronization extensive Current clock status : Locked Clock locked to : Primary SNMP trap status : Disabled Configured sources: Interface : et-0/0/12 SyncE Bundle: ae0 Status : Primary Index : 1280 Clock source state : Clk qualified Priority : Default(8) Configured QL : PRC ESMC QL : DNU Clock source type : ifd Clock Event : Clock locked Wait-to-restore : 0 min Hold-off : 1000 ms Interface State : Up,pri,ESMC TX(QL DNU/SSM 0xf),
show chassis synchronization clock-module (AFTS enabled)
GNSS active:
root@host> show chassis synchronization clock-module
Clock module on SCB0
Current role : master
Current state : locked to GNSS
State for : 0 days, 06 hrs, 50 mins, 34 secs
State since : Wed Jan 29 23:29:27 2025
GNSS inactive:
root@host> show chassis synchronization clock-module
Clock module on SCB0
Current role : master
Current state : locked to et-0/0/12
State for : 0 days, 05 hrs, 43 mins, 34 secs
State since : Tue Feb 18 02:45:17 2025
Monitored clock sources
Interface Type Status
et-0/0/12 syncE-hybrid qualified-selected
Release Information
Command introduced in Junos OS Release 7.6.
memory-logging (summary | messages) introduced in Junos OS Evolved Release
25.4R1.