3.17 Ntp Communication Failure; Time Synchronization By Ntp Is Disabled - NEC IP8800/S2400 Series Troubleshooting Manual

3.
Troubleshooting Functional Failures in Operation

3.17 NTP Communication Failure

3.17.1

Time Synchronization by NTP Is Disabled

If time synchronization by NTP is disabled, isolate the problem by following the failure analysis methods shown in the
table below.
Table 3-65: NTP Failure Analysis Method
No. Troubleshooting Steps and Command
1 Execute the show clock command to see if
a time zone has been set up.
2 Check the difference in time between this
system and the NTP server.
3 Check communication with the NTP server
by IPv4.
118
If the command retrieves the time zone setting, go to No. 2.
If no time zone has been set up in the output of the command, set up a time zone.
Go to No. 3 if the difference in time between this system and the NTP server is
within 1000 seconds.
If the difference in time between this system and the NTP server is greater than
1000 seconds, adjust the time of this system with the time of the NTP server using
the set clock command.
Execute the ping command to see if NTP server and this system can
communicate over IPv4 protocol.
Confirm that no setting for discarding packets using UDP port number 123 exists
in the NTP server or this system.
Action