125
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
server-name
: Specifies the host name of the NTP server, a case-insensitive string of 1 to 253
characters.
ip-address
: Specifies the IP address of the NTP server. It must be a unicast address, rather than a
broadcast address, a multicast address, or the IP address of the local clock.
vpn-instance
vpn-instance-name
: Specifies the MPLS L3VPN to which the NTP server belongs,
where
vpn-instance-name
is a case-sensitive string of 1 to 31 characters. If the NTP server is on the
public network, do not specify this option.
authentication-keyid
keyid
: Specifies the key ID to be used for sending NTP messages to the NTP
server, where
keyid
is in the range of 1 to 4294967295. If the option is not specified, the local device
and NTP server do not authenticate each other.
source
interface-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-number
argument represents the interface
type and number.
version
number
: Specifies the NTP version. The value range for the
number
argument is 1 to 4, and
the default is 4.
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 the
vpn-instance
vpn-instance-name
option 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 the
vpn-instance
vpn-instance-name
option 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
sntp authentication enable
sntp authentication-keyid
sntp reliable authentication-keyid