91
Item Description
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.
Date and time configuration example
1.
Network requirements
•
The local clock of Device A is set as the reference clock, with the stratum of 2.
•
Device B works in the client mode, and uses Device A as the NTP server.
Figure 63
Network diagram for date and time configuration
2.
Configure Device A
# Configure the local clock as the reference clock, with the stratum of 2.
•
Select
Device Management
>
System Time
from the navigation tree, and click
Net Time
.
•
Select
127.127.1.1
from the
Local Reference Source
drop-down list.
•
Select
2
from the
Stratum
drop-down list.
•
Click
Apply
.
3.
Configure Device B
# Configure Device A as the NTP server of Device B.
•
Select
Device Management
>
System Time
from the navigation tree, and click
Net Time
.
•
Type
1.0.1.11
in the
NTP Server 1
box.
•
Click
Apply
.
4.
Verify the configuration
