NTP Operational Commands

OSPF Show Commands

NTP Status

Displays the NTP status information.

Syntax:

show ntp status

supervisor@rtbrick: op> show ntp status
associd=0 status=C016 leap_alarm, sync_unspec, 1 event, restart,
leap=3, stratum=16, precision=-21, rootdelay=0.000, rootdisp=0.225,
refid=INIT, reftime=0x00000000.00000000  1900-01-01T00:00:00+00:00,
tc=0, peer=0, offset=0.000000,
frequency=0.000000, sys_jitter=0.000000, clk_jitter=0.000477,
clock=0xedcd4762.b7eb15fc  2026-06-05T13:02:26.718430+00:00, processor="x86_64", system="Linux/6.1.170",
version="ntpd ntpsec-1.2.2", clk_wander=0.000000,
leapsec=2017-01-01T00:00Z, expire=2026-12-28T00:00Z, mintc=0

NTP Peer

Displays history of the NTP peers, showing when they went up or down and any changes in their status, identified by the peer’s IP address.

Syntax:

show ntp peer <options>

Option Description

<peer-ip>

IP address of the NTP peer to show history for.

history

Displays history of the NTP peers, showing when they went up or down and any changes in their status, identified by the peer’s IP address.

detail

Displays detailed information for a specific NTP peer, including its association ID, status, source address, port, hostname, destination address, leap indicator, stratum, precision, root delay, root dispersion, reference ID, reference time, receive time, reachability, host mode, peer mode, poll intervals, headway, key ID, offset, delay, dispersion, and jitter.

<peer-ip> history

Displays the history of a specific NTP peer.

<peer-ip> detail

Displays detailed information for a specific NTP peer.

The example below shows the history of a specific NTP peer, showing when it went up or down and any changes in its status.

supervisor@rtbrick: op> show ntp peer 192.0.2.105 history
srcadr                         timestamp                                associd     status    reason
192.0.2.105                    Fri Jun 05 13:01:36 GMT +0000 2026         17767       8011    Peer Up
192.0.2.105                    Fri Jun 05 13:01:56 GMT +0000 2026         17767       8011    Peer Down
192.0.2.105                    Fri Jun 05 13:02:11 GMT +0000 2026         17767       8011    Peer Up

The example below shows detailed information of the NTP peers using NTP Mode 6 control message READVAR, including their association ID, status, source address, port, hostname, destination address, leap indicator, stratum, precision, root delay, root dispersion, reference ID, reference time, receive time, reachability, host mode, peer mode, poll intervals, headway, key ID, offset, delay, dispersion, and jitter.

supervisor@rtbrick>LEAF01: cfg> show ntp peer detail
associd: 60555, status: 161a
  srcadr: 198.51.100.13, srcport: 123
  srchost: node-2.infogral.is
  dstadr: 198.51.100.101, Port: 123
  leap: 0 leap_none, stratum: 2, precision: -25
  rootdelay: 5.112
  rootdisp: 0.290
  refid: 192.0.2.4
  reftime: 2025-05-27T12:34:07.000003+0000
  rec: 2025-05-27T12:36:32.000003+0000
  reach: 336, unreach: 2
  hmode: 3 pmode: 4, hpoll: 9, ppoll: 9
  headway: 0, keyid: 0
  flash: 0 Ok
  offset: -0.198
  delay: 2.828
  dispersion: 16.124001
  jitter: 0.638
  xleave: 0.036000
<...>

NTP Associations

Displays the information about the various NTP servers configured.

Syntax:

show ntp association <options>

Option Description

no-resolve

Details without DNS resolution.

 
show ntp association
supervisor@rtbrick: op> show ntp association
Flags: space ( ) Discarded due to high stratum and/or failed sanity checks, x Designated falseticker by the intersection algorithm,
       . Culled from the end of the candidate list, - Discarded by the clustering algorithm,
       + Included in the final selection set, # Selected for synchronization but distance exceeds maximum,
       * Selected for synchronization, o Selected for synchronization, pps signal in use.
remote                              refid             st t  when  poll reach    delay   offset  jitter
 192.0.2.105                        .INIT.            16 u     -    64     0    0.000    0.000   0.000
 192.0.2.106                        .INIT.            16 u     -    64     0    0.000    0.000   0.000

System Uptime

The show system uptime command provides a timeline summary of the system, including when it booted, when forwarding started, last configuration change, and current CPU load.

Syntax:

show system uptime

Example for the command:

supervisor@rtbrick.net: cfg> show system uptime
Time source: NTP CLOCK, Current time: 2026-04-02 04:46:30 UTC
Forwarding started: 2026-04-01 11:48:23 UTC (16 hours, 58 minutes ago)
Last configured: 2026-04-02 04:45:08 UTC (1 minute ago) by supervisor
Container boot time: 2026-04-01 11:08:55 UTC (17 hours, 37 minutes ago)
CPU load averages [1m, 5m, 15m]: 1.58, 1.56, 3.32

Verifying NTP Service on Linux

To get more information about NTP’s status, use the ntpq command:

The command displays the NTP servers that the system is synchronized with.

supervisor@rtbrick>LEAF01:~ $ sudo ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
198.51.100.5       .XFAC.          16 u    -   64    0    0.000    0.000   0.000