Manual
Select to manually configure the system time, including the setting
of Year, Month, Day, Hour, Minute, and Second.
NTP
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.
Key 1 Set an 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.
ï‚· ID is the ID of a key.
ï‚· 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
TimeZone Set the time zone for the system.
System time configuration example
Network requirements
ï‚· As shown in Figure 36, the local clock of Device A is set as the reference clock.
ï‚· Switch B works in the client mode, and uses Device A as the NTP server.
ï‚· Configure NTP authentication on Device A and Switch B.
Figure 36 Network diagram for configuring system time
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