User Manual

24-Port Gigabit (Hi-Power) PoE+ Ethernet Smart Managed Pro Switch with 2 SFP Ports
Configure System Information User Manual64
determine the time and, optionally, the round-trip delay and local clock offset relative
to the server.
• 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 Inter
net-wide scope.
The default is Disable.
9. If the SNTP client mode is Unicast, you can 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 69.
10. 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 is 123. When the default is
configured, the actual client port value used in SNTP packets is assigned by the OS.
11. 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 is 6.
12. 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 is 6.
13. 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 is 5.
14. 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 is 1.
15. In the T
ime 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 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.
16. In
the Offset
Hours field, specify the number of hours that the time zone is different from
UTC.
The allowed range is –12 to 13. The default is 0.
17. In the Offset
Minutes field, specify the number of minutes that the time zone is different
from UTC.