
87
Table 15 Configuration items
Item Descri
tion
Clock status Displays the synchronization status of the system clock.
Local Reference Source
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.
• 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.
Stratum
Set the stratum level of the local clock.
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.
Source Interface
Set the source interface for an NTP message.
If you do not want the IP address of a certain interface on the local device
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 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.
Key 2
External
Reference
Source
NTP Server
1/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.
NTP Server
2/Reference
Key ID.
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.
Comentários a estes Manuais