
Time Protocols
SNTP: Viewing, Selecting, and Configuring
SNTP: Viewing, Selecting, and
Configuring
SNTP Feature Default Menu CLI Web
view the SNTP time synchronization configuration n/a page 9-6 page 9-9 —
select SNTP as the time synchronization method timep page 9-6 page 9-10 ff. —
disable time synchronization timep page 9-6 page 9-14 —
enable the SNTP mode (Broadcast, Unicast, or Disabled) disabled —
broadcast n/a page 9-7 page 9-11 —
unicast n/a page 9-7 page 9-11 —
none/disabled n/a page 9-7 page 9-14 —
configure an SNTP server address (for Unicast mode only) none page 9-7 page 9-11 ff. —
change the SNTP server version (for Unicast mode only) 3 page 9-7 page 9-13 —
change the SNTP poll interval 720 seconds page 9-7 page 9-13 —
Table 9-1. SNTP Parameters
SNTP Parameter Operation
Time Sync
Method
Used to select either SNTP, TIMEP, or None as the time synchronization method.
SNTP Mode
Disabled The Default. SNTP does not operate, even if specified by the Menu interface Time Sync Method
parameter or the CLI timesync command.
Unicast Directs the switch to poll a specific server for SNTP time synchronization. Requires at least one server
address.
Broadcast Directs the switch to acquire its time synchronization from data broadcast by any SNTP server to the
network broadcast address. The switch uses the first server detected and ignores any others.
However, if the Poll Interval expires three times without the switch detecting a time update from the
original server, it the switch accepts a broadcast time update from the next server it detects.
Poll Interval
(seconds)
In Unicast Mode: Specifies how often the switch polls the designated SNTP server for a time update.
In Broadcast Mode: Specifies how often the switch polls the network broadcast address for a time
update.
9-5
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