System Time
Adding an SNTP Server
Cisco Small Business 200 1.1 Series Smart Switch Administration Guide 39
5
Adding an SNTP Server
Up to eight SNTP servers can be configured. In addition to configuring SNTP
server(s), enable this feature by using the
SNTP Settings
page.
NOTE To specify an SNTP server by name, you must first configure DNS server(s) on the
switch (see the Defining DNS Servers section).
The switch supports the following modes:
• Broadcast—The SNTP server broadcasts the time, and the switch listens to
these broadcasts. When the switch is in this mode, there is no need to
define a Unicast SNTP server.
• Unicast SNTP Server Mode—The switch sends Unicast queries to the list of
manually-configured SNTP servers, and waits for a response.
The switch supports having both modes active at the same time and selects the
best source of the parameters according to the closest stratum (distance from the
reference clock.).
To add an SNTP server:
STEP 1 Click Administration > Time Settings > SNTP Settings. The
SNTP Settings
page
opens.
This page displays the following information for each Unicast SNTP server:
• SNTP Server—SNTP server IP address. Up to eight SNTP servers can be
defined. The preferred server, or hostname, is chosen according to its
stratum level.
• Poll Interval—Displays whether polling is enabled or disabled.
• Authentication Key ID—Key Identification used to communicate between
the SNTP server and switch.
• Stratum Level—Distance from the reference clock expressed as a
numerical value. An SNTP server cannot be the primary server (stratum level
1) unless polling interval is enabled.
• Status—SNTP server status. The possible options are:
- Up—SNTP server is currently operating normally.
- Down—SNTP server is currently not available.
- Unknown—SNTP server is currently being searched for by the switch.
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