Troubleshooting Network Time Protocol (Ntp) Errors - Dell PS-M4110 User Manual

NOTE: The default backup file name contains the Chassis' service tag. This backup file can be used later, to
restore the settings and certificates for this chassis only.
3. To restore the chassis configuration, click Choose File, specify the backup file, and click Restore.
NOTE: CMC does not reset upon restoring configuration, however CMC services may take some time to
effectively impose any changed or new configuration. After successful completion, all current sessions are
closed.

Troubleshooting Network Time Protocol (NTP) Errors

After configuring CMC to synchronize its clock with a remote time server over the network, it may take 2-3 minutes
before a change in the date and time occurs. If after this time there is still no change, it may be necessary to
troubleshoot a problem. CMC may not be able to synchronize its clock for the following reasons:
• Problem with the NTP Server 1, NTP Server 2, and NTP Server 3 settings.
• Invalid host name or IP address may have been accidentally entered.
• Network connectivity problem that prevents CMC from communicating with any of the configured NTP servers.
• DNS problem, preventing any of the NTP server host names from being resolved.
To troubleshoot these problems, check the information in the CMC Trace Log. This log contains an error message for
NTP related failures. If CMC is not able to synchronize with any of the configured remote NTP servers, then CMC time is
synchronized to the local system clock and the trace log contains an entry similar to the following:
Jan 8 20:02:40 cmc ntpd[1423]: synchronized to LOCAL(0), stratum 10
You can also check the ntpd status by typing the following racadm command:
racadm getractime –n
If the '*' is not displayed for one of the configured servers, the settings may not be configured correctly. The output of
this command contains detailed NTP statistics that may be useful in debugging the problem.
If you attempt to configure a Windows-based NTP server, it may help to increase the MaxDist parameter for ntpd.
Before changing this parameter, understand all the implications, since the default setting must be large enough to work
with most NTP servers.
To modify the parameter, type the following command:
racadm config –g cfgRemoteHosts –o cfgRhostsNtpMaxDist 32
After making the change, disable NTP, wait for 5-10 seconds, then enable NTP again:
NOTE: NTP may take an additional three minutes to synchronize again.
To disable NTP, type:
racadm config –g cfgRemoteHosts –o cfgRhostsNtpEnable 0
To enable NTP, type:
racadm config –g cfgRemoteHosts –o cfgRhostsNtpEnable 1
If the NTP servers are configured correctly and this entry is present in the trace log, then this confirms that CMC is not
able to synchronize with any of the configured NTP servers.
If the NTP server IP address is not configured, you may see a trace log entry similar to the following:
Jan 8 19:59:24 cmc ntpd[1423]: Cannot find existing interface for address
1.2.3.4 Jan 8 19:59:24 cmc ntpd[1423]: configuration of 1.2.3.4 failed
If an NTP server setting was configured with an invalid host name, you may see a trace log entry as follows:
Aug 21 14:34:27 cmc ntpd_initres[1298]: host name not found: blabla Aug 21
14:34:27 cmc ntpd_initres[1298]: couldn't resolve `blabla', giving up on it
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