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sourceinterface-type interface-number: Specifies the source interface for NTP messages. In an NTP
message the local device sends to the NTP server, the source IP address is the primary IP address
of this interface. The interface-type interface-numberargument represents the interface type and
number.
versionnumber: Specifies the NTP version. The value range for thenumberargument is 1 to 4. The
default value is4.
Usage guidelines
When you specify an NTP server for the device, the device is synchronized to the NTP server, but the
NTP server is not synchronized to the device.
To synchronize the PE to a PE or CE in a VPN, provide vpn-instance vpn-instance-name in your
command.
If you include thevpn-instance vpn-instance-nameoption in the undo ntp-service unicast-server
command, the command removes the NTP server with the IP address of ip-address in the specified
VPN. If you do not include thevpn-instance vpn-instance-nameoption in the command, the
command removes the NTP server with the IP address of ip-address in the public network.
Examples
# Specify NTP server 10.1.1.1 for the device, and configure the device to run NTP version 4.
<Sysname> system-view
[Sysname] sntp unicast-server 10.1.1.1 version 4
Related commands
sntpauthentication enable
sntp authentication-keyid
sntp reliable authentication-keyid
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