White Papers

Diagnostics VRTX Chassis
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 issue. If attempting 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,
because the default setting must be large enough to work with most NTP servers.
To modify the parameter, run the following command:
racadm config –g cfgRemoteHosts –o cfgRhostsNtpMaxDist 32
After changing, disable NTP, wait for 5–10 seconds, then enable NTP. NTP may take an additional
three minutes to synchronize again.
To disable NTP, run the following command:
racadm config –g cfgRemoteHosts –o cfgRhostsNtpEnable 0
To enable NTP, run the following command:
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: error
Aug 21 14:34:27 cmc ntpd_initres[1298]: couldn't resolve hostname, giving up
on it
Interpreting LED Colors and Blinking Patterns
LEDs on the chassis provide the component status as following:
 Steadily glowing green LEDs indicate that the component is turned on. If the green LED is
blinking, it indicates a critical but routine event, such as a firmware upload, during which the
unit is not operational. It does not indicate a fault.
 A blinking amber LED on a module indicates a fault on that module.
 Blue, blinking LEDs are configurable by the user and used for identification
Component LED Blinking Pattern Implication
CMC Green Glowing steadily Turned ON
Green dark Turned OFF
Blue Glowing Steadily Active
Blue Dark Standby
Amber Blinking Fault