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Configuring System Information
36
ProSafe M5300 Switch
SNTP Global Configuration
SNTP stands for Simple Network Time Protocol. As its name suggests, it is a less
complicated version of Network Time Protocol, which is a system for synchronizing the clocks
of networked computer systems, primarily when data transfer is handled via the Internet.
1. Use Client Mode to specify the mode of operation of SNTP Client. An SNTP client may
operate in one of the following modes.
• Disable - SNTP is not operational. No SNTP requests are sent from the client nor are
any received SNTP messages processed.
• Unicast - SNTP operates in a point to point fashion. A unicast client sends a request
to a designated server at its unicast address and expects a reply from which it can
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 has a
single subnet scope while a multicast address has Internet wide scope.
Default value is Disable.
2. Use Port to specify the local UDP port to listen for responses/broadcasts. Allowed range is
1 to 65535. Default value is 123.
3. Use Unicast Poll Interval to specify the number of seconds between unicast poll requests
expressed as a power of two when configured in unicast mode. Allowed range is (6 to 10).
Default value is 6.
4. Use Broadcast Poll Interval to specify the number of seconds between broadcast poll
requests expressed as a power of two when configured in broadcast mode. Broadcasts
received prior to the expiry of this interval are discarded. Allowed range is (6 to 10). Default
value is 6.
5. Use Unicast Poll Timeout to specify the number of seconds to wait for an SNTP response
when configured in unicast mode. Allowed range is (1 to 30). Default value is 5.
6. Use Unicast Poll Retry to specify the number of times to retry a request to an SNTP server
after the first time-out before attempting to use the next configured server when configured in
unicast mode. Allowed range is (0 to 10). Default value is 1.
7. When using SNTP/NTP time servers to update the switch's clock, the time data received
from the server is based on Coordinated Universal Time (UTC) which is the same as
Greenwich Mean Time (GMT). This may not be the time zone in which the switch is located.
Use Time Zone Name to configure a timezone specifying the number of hours and
optionally the number of minutes difference from UTC with Offset Hours and Offset
Minutes. The time zone can affect the display of the current system time. The default
value is UTC.
8. Use Offset Hours to specify the number of hours difference from UTC. See Time Zone
Name (
Step 7 previous) for more information. Allowed range is (-24 to 24).The default value
is 0.
9. Use Offset Minutes to specify the number of Minutes difference from UTC. See Time Zone
Name (
Step 7 previous) for more information. Allowed range is 0 to 59. The default value is
0.