User Manual

Configure System Information
43
Insight Managed 8-Port Gigabit Ethernet Smart Cloud Switch with 2 SFP Fiber Ports
• Broadcast. SNTP operates in the same manner as multicast mode but uses a local
broadcast address instead of a multicast address. The broadcast address provides a
single-subnet scope while a multicast address provides an Internet-wide scope.
The default value is Disable.
8. If the SNTP client mode is Unicast, use the SNTP Server Configuration page to add the IP
address or DNS name of one or more SNTP servers for the switch to poll.
For more information, see Configure an SNTP Server on page 47.
9. In the Port field, specify the local UDP port that the SNTP client receives server packets on.
The allowed range is 1025 to 65535 and 123. The default value is 123. When the default
value is configured, the actual client port value used in SNTP packets is assigned by the
operating system.
10. In the Unicast Poll Interval field, specify the number of seconds between unicast poll
requests expressed as a power of 2. to The allowed range is 6 to 10. The default value is 6.
11. In the Broadcast Poll Interval field, specify the number of seconds between broadcast poll
requests expressed as a power of 2.
Broadcasts received prior to the expiry of this interval are discarded. The allowed range is
6 to 10. The default value is 6.
12. In the Unicast Poll Timeout field, specify the number of seconds to wait for an SNTP
response to a unicast poll request.
The allowed range is 1 to 30. The default value is 5.
13. In the Unicast Poll Retry field, specify the number of times to retry a unicast poll request to
an SNTP server after the first time-out before the switch attempts to use the next configured
server.
The allowed range is 0 to 10. The default value is 1.
14. In the Time Zone Name field, specify a time zone.
You can also specify the number of hours and number of minutes that the time zone is
different from the Coordinated Universal Time (UTC). The time zone can affect the
display of the current system time. The default value is UTC.
Note: When using SNTP/NTP time servers to update the switch’s clock, the
time data received from the server is based on the UTC, which is the
same as Greenwich Mean Time (GMT). This might not be the time
zone in which the switch is located.
15. In the Offset Hours field, specify the number of hours that the time zone is different from
UTC.
See the description for Time Zone Name in Step 14 for more information. The allowed
range is –12 to 13. The default value is 0.
16. In the Offset Minutes field, specify the number of minutes that the time zone is different
from UTC.