Time Protocols

SNTP: Viewing, Selecting, and Configuring

Table 9-1.SNTP Parameters

SNTP Parameter

Operation

 

 

Time Sync

Used to select either SNTP, TIMEP, or None as the time synchronization method.

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

In Unicast Mode: Specifies how often the switch polls the designated SNTP server for a time update.

(seconds)

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 9-21.

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.

 

 

 

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

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