Clock status Display the synchronization status of the system clock.
Source Interface
Set the source interface for an NTP message.
This configuration uses the IP address of an interface as the source IP
address in the NTP messages. If the specified source interface is down, the
source IP address is the IP address of the egress interface.
TIP:
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.
Key 1
Set NTP authentication key.
The NTP authentication feature should be enabled for a system running
NTP in a network that requires high security. This feature enhances the
network security by means of client-server key authentication, and
prohibits a client from synchronizing with a device that has failed
authentication.
You can set two authentication keys, each of which has a key ID and key
string.
• ID—ID of a key.
• Key string—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
As shown in Figure 51:
• The local clock of Device A is set as the reference clock.
• Switch B operates in client mode, and uses Device A as the NTP server.
Configure NTP authentication on Device A and Switch B so that Switch B is to be synchronized to Device
A.
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