NEC IP8800/S2400 User Manual
3.
Troubleshooting Functional Failures in Operation
118
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 below.
Table 3-65: NTP Failure Analysis Method
No.
Troubleshooting Steps and Command
Action
1
Execute the show clock command to see if
a time zone has been set up.
a time zone has been set up.
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.
2
Check the difference in time between this
system and the NTP server.
system and the NTP server.
Go to No. 3 if the difference in time between this system and the NTP server is
within 1000 seconds.
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.
1000 seconds, adjust the time of this system with the time of the NTP server using
the set clock command.
3
Check communication with the NTP server
by IPv4.
by IPv4.
Execute the ping command to see if NTP server and this system can
communicate over IPv4 protocol.
communicate over IPv4 protocol.
Confirm that no setting for discarding packets using UDP port number 123 exists
in the NTP server or this system.
in the NTP server or this system.