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Step
2.
Specify an NTP server for the
device.
To use an NTP server as the time source, make sure its clock has been synchronized. If the stratum level
of the NTP server is greater than or equal to that of the client, the client does not synchronize with the NTP
server.

Configuring SNTP authentication

SNTP authentication makes sure an SNTP client is synchronized only to an authenticated trustworthy NTP
server.
To make sure SNTP authentication can work, follow these guidelines on configuring SNTP authentication:
Enable authentication on both the NTP server and the SNTP client.
Configure the SNTP client with the same authentication key ID and key value as the NTP server, and
specify the key as a trusted key on both the NTP server and the SNTP client. For information about
configuring NTP authentication on an NTP server, see
Associate the specified key with the specific NTP server on the SNTP client.
With authentication disabled, the SNTP client can synchronize with the NTP server regardless of whether
the NTP server is enabled with authentication.
To configure SNTP authentication on the SNTP client:
Step
1.
Enter system view.
2.
Enable SNTP authentication.
3.
Configure an SNTP
authentication key.
4.
Specify the key as a trusted
key.
Command
For IPv4:
sntp unicast-server
{ server-name | ip-address }
[ vpn-instance
vpn-instance-name ]
[ authentication-keyid keyid |
source interface-type
interface-number | version
number ] *
For IPv6:
sntp ipv6 unicast-server
{ server-name | ipv6-address }
[ vpn-instance
vpn-instance-name ]
[ authentication-keyid keyid |
source interface-type
interface-number ] *
Command
system-view
sntp authentication enable
sntp authentication-keyid keyid
authentication-mode md5 { cipher
| simple } value
sntp reliable authentication-keyid
keyid
53
Remarks
By default, no NTP server is
specified for the device.
Repeat this step to specify multiple
NTP servers.
To use authentication, you must
specify the authentication-keyid
keyid option.
"Configuring
NTP."
Remarks
N/A
By default, SNTP authentication is
disabled.
By default, no SNTP authentication
key is configured.
By default, no trusted key is
specified.

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