Implementing NTP on Cisco IOS XR Software
How to Implement NTP on Cisco IOS XR Software
| Command or Action | Purpose |
Step 3 |
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master stratum | Makes the router an authoritative NTP server. | |
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| Note Use the master command with caution. It is very |
| Example: | easy to override valid time sources using this |
| command, especially if a low stratum number is | |
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| configured. Configuring multiple machines in the |
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| same network with the master command can cause |
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| instability in timekeeping if the machines do not |
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| agree on the time. |
Step 4 |
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end | Saves configuration changes. | |
| or | • When you issue the end command, the system prompts |
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| |
| commit | you to commit changes: |
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| Uncommitted changes found, commit them before |
| Example: | exiting(yes/no/cancel)? |
| RP/0/RP0/CPU0:router(config)# end | [cancel]: |
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| |
| or | – Entering yes saves configuration changes to the |
| RP/0/RP0/CPU0:router(config)# commit | |
| running configuration file, exits the configuration | |
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| session, and returns the router to EXEC mode. |
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| – Entering no exits the configuration session and |
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| returns the router to EXEC mode without |
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| committing the configuration changes. |
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| – Entering cancel leaves the router in the current |
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| configuration session without exiting or |
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| committing the configuration changes. |
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| • Use the commit command to save the configuration |
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| changes to the running configuration file and remain |
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| within the configuration session. |
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Updating the Hardware Clock
This task explains how to configure the hardware clock to be periodically updated from the software clock running NTP.
On devices that have hardware clocks (system calendars), you can configure the hardware clock to be periodically updated from the software clock. This is advisable for any device using NTP, because the time and date on the software clock (set using NTP) is more accurate than the hardware clock, because the time setting on the hardware clock has the potential to drift slightly over time.
Note No specific command enables NTP; the first NTP configuration command that you issue enables NTP.
Cisco IOS XR System Management Configuration Guide
