Diagnostics - Motorola PTP 300 series User Manual

8.3.10.8 SNTP (Simple Network Time Protocol)
The SNTP client allows the 300 Series to obtain accurate date and time updates from a networked
timeserver. The system time is used for SNMP and event logging.
SNTP State: When enabled, the Remote Management web page permits the following attributes
to be set.
SNTP IP Address: The IP Address of the networked SNTP Server.
SNTP Port Number: The port number of the networked SNTP server. By convention the
default value for the port number is 123.
SNTP Poll Interval: The period at which the SNTP client polls the server for time correction
updates. Default 1 hour. If for any reason an SNTP poll fails, the client will automatically perform
3 retries before waiting for the user defined poll period.
Time Zone: The time zone is a fixed offset from GMT that is added to the SNTP time to allow
the expression of time in all geographic time zones.
Daylight Saving: Allows a fixed offset of one hour to be added to the SNTP time in order to
reflect the local daylight saving time.
8.3.10.9 Setting the Clock
The PTP 300 Series bridge has a system clock which can be used to supply accurate date and
time information in the absence of a SNTP server. The system clock is battery backed and will
continue to operate for several days if the 300 Series bridge has been switched off.
SNTP State: If the SNTP State is set to "Disabled", see
ment web page allows the following attributes to be set:
Set Time: Shows the current time in 24 hour mode. The three editable fields display hours
minutes and seconds.
Set Date: Displays the current date. The year, month and day can be set using the drop-down
selection boxes.
Time Zone: See
Daylight Saving: See

8.3.11 Diagnostics

For the PTP 300 Series, the storage of link performance histograms is set to 31 days worth of
data. To optimize RAM (volatile memory) usage of a cascading histogram approach has been
adopted. The data is stored for one hour at a resolution of one second. The histograms use a
cascading approach to daisy chain multiple histograms together. When the first histogram fills up
the overflow from the first is used as an input to the next histogram in line. To optimize memory
utilization, a statistical analysis is performed on the overflow to reduce the amount of data to be
stored. The cascading histograms are defined as:
Web Page Reference
Section 8.3.10.9
"Setting The Clock".
Section 8.3.10.9
Figure
"Setting The Clock"
111
66, then the Remote Manage-