Table 15 Configuration items

Item

Description

Clock status

Displays the synchronization status of the system clock.

 

 

 

Set the IP address of the local clock source to 127.127.1.u, where u

 

ranges from 0 to 3, representing the NTP process ID.

Local Reference Source

• If the IP address of the local clock source is specified, the local clock is

used as the reference clock, and thus can provide time for other devices.

 

 

• If the IP address of the local clock source is not specified, the local clock

 

is not used as the reference clock.

 

Set the stratum level of the local clock.

Stratum

The stratum level of the local clock decides the precision of the local clock.

A higher value indicates a lower precision. A stratum 1 clock has the

 

highest precision, and a stratum 16 clock is not synchronized and cannot

 

be used as a reference clock.

 

 

 

Set the source interface for an NTP message.

 

If you do not want the IP address of a certain interface on the local device

Source Interface

to become the destination address of response messages, you can specify

the source interface for NTP messages, so that the source IP address in the

 

NTP messages is the primary IP address of this interface. If the specified

 

source interface is down, the source IP address of the NTP messages sent is

 

the primary IP address of the outbound interface.

Key 1

Key 2

Set NTP authentication key.

The NTP authentication feature should be enabled for a system running NTP in a network where there is a high security demand. This feature enhances the network security by means of client-server key authentication, which prohibits a client from synchronizing with a device that has failed authentication.

You can set two authentication keys, each of which is composed of a key ID and key string.

•ID is the ID of a key.

•Key string is a character string for MD5 authentication key.

NTP Server 1/Reference Key ID.

External

Reference

Source NTP Server

2/Reference

Key ID.

Specify the IP address of an NTP server, and configure the authentication key ID used for the association with the NTP server. Only if the key provided by the server is the same with the specified key will the device synchronize its time to the NTP server.

You can configure two NTP servers. The clients will choose the optimal reference source.

IMPORTANT:

The IP address of an NTP server is a unicast address, and cannot be a broadcast or a multicast address, or the IP address of the local clock source.

Configuring the time zone and daylight saving time

1.Select Device > System Time from the navigation tree.

2.Click Time Zone.

The page for setting the time zone appears.

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