Allied Telesis AT-8000S Guide de l'utilisateur télécharger pdf (Page 21)

Configuring System Time

Page 22

Broadcast Time Information

Broadcast information is used when the server IP address is unknown. When a broadcast message is sent from

an SNTP server, the SNTP client listens for the response. The SNTP client neither sends time information

requests nor receives responses from the Broadcast server.

Message Digest 5 (MD5) Authentication safeguards device synchronization paths to SNTP servers. MD5 is an

algorithm that produces a 128-bit hash. MD5 is a variation of MD4, and increases MD4 security. MD5 verifies the

integrity of the communication, authenticates the origin of the communication.

To define SNTP global parameters:

1. Click System > System Time. The System Time Page opens.

The Simple Network Time Protocol (SNTP) section of the System Time Page contains the following fields:

• Status — Indicates if SNTP is enabled on the device. The possible field values are:

– Disabled — Indicates that SNTP is disabled.

– Enabled — Indicates that SNTP is enabled.

• Server IP Address — Displays a user-defined SNTP server IP address.

• Poll Interval — Defines the interval (in seconds) at which the SNTP server is polled for Unicast information.

The Poll Interval default is 1024 seconds.

2. Select the SNTP Status.

3. Define the Server IP Address and the Poll Interval fields.

4. Click Apply. The SNTP global settings are defined, and the device is updated.

5. Click Save Config on the menu to save the changes permanently.

Configuring Daylight Saving Time

To configure Daylight Saving Time:

1. Click System > System Time. The System Time Page opens:

The Additional Time Parameters section of the System Time Page contains the following fields:

• Daylight Saving — Enables automatic Daylight Saving Time (DST) on the device based on the device’s

location. There are two types of daylight settings, either by a specific date in a particular year or a recurring

setting irrespective of the year. For a specific setting in a particular year complete the Daylight Savings area,

and for a recurring setting, complete the Recurring area. The possible field values are:

– USA — The device devices to DST at 2:00 a.m. on the first Sunday of April, and reverts to standard time

at 2:00 a.m. on the last Sunday of October.

– European — The device devices to DST at 1:00 am on the last Sunday in March and reverts to standard

time at 1:00 am on the last Sunday in October. The European option applies to EU members, and other

European countries using the EU standard.

– Other — The DST definitions are user-defined based on the device locality. If Custom is selected, the

From and To fields must be defined.

• Time Set Offset — Used for non-USA and European countries to set the amount of time for DST

(in minutes). The default time is 60 minutes. The range is 1-1440 minutes.

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Allied Telesis AT-8000S Guide de l'utilisateur Page 21