IronPort Systems 4108GL - Manual (Page 135)

8-5
Time Protocols
SNTP: Viewing, Selecting, and Configuring
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Table 8-1.SNTP Parameters
Menu: Viewing and Configuring SNTP
To View, Enable, and Modify SNTP Time Protocol:
1. From the Main Menu, select:
2. Switch Configuration...
1. System Information
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.
Server Address Used only when the SNTP Mode is set to Unicast. Specifies the IP address of the SNTP server that
the switch accesses for time synchronization updates. You can configure up to three servers; one
using the menu or CLI, and two more using the CLI. See “SNTP Unicast Time Polling with Multiple
SNTP Servers” on page 20.
Server Version Default: 3; range: 1 - 7. Specifies the SNTP software version to use, and is assigned on a per-server
basis. The version setting is backwards-compatible. For example, using version 3 means that the
switch accepts versions 1 through 3.