User Manual

Chapter 4 - Operation and Administration Using the CLI NPU Configuration
4Motion 439 System Manual
4.3.14.2.3 Configuring the Date and Time
The UTC time is used to configure the following:
 Local time: Differs from the UTC time with respect to the value you have
specified for the localUTCDiff and DST parameters. The local time is equal to
the sum of the UTC time, the value of the localUTCDiff parameter (local
offset from UTC time) and DST (daylight saving time offset). For more
information about configuring this parameter, “Configuring the GPS Clocks”
on page 434. You can use the CLI to display the current local time. For details,
refer the section, “Displaying the Date and Time Parameters” on page 445.
 System time: Refers to the operating system (kernel) time that is identical to
the UTC time when the system boots up. The system time is updated every
hour with the time received from the GPS receiver.
 Real Time Clock (RTC) time: Refers to the time maintained by the board’s
hardware clock. By default, the RTC time is set to 1st January, 1970. The RTC
time is updated every hour with the UTC time that is received from the GPS
receiver or that you have configured from the CLI. The RTC time is used for
creating the timestamp for log and trace messages, performance data
collection files, and for managing the interval after which a backup of the
configuration file should be maintained and performance data should be
collected.
Execute the following command to configure the date and time parameters. If the
GPS is synchronized to its satellites and is connected to 4Motion, the UTC time is
provided by the GPS. Otherwise the UTC time that you configure is used instead.
To configure the date and time parameters, run the following command:
npu(config)# set date [UTC <HH:MM:SS,DD/MM/YYYY>] [LocalUTCDiff
<+/-HH:MM>] [DST <(0-2)>]
Command
Modes
Global configuration mode
IMPORTANT
An error may occur if :
1) UTC time is not in the valid format i.e. hh: mm: ss, dd/mm/yyyy.
2) Local UTCDiff is not valid format i.e. +/-hh:mm
3) Local UTC Diff is out of the range between -12 to +13 or it is not in steps of 30 minutes.
4) DST is out of range i.e between 0 to 2