HPE FlexNetwork 10500 Series Network Management And Monitoring Command Reference page 145

Use undo sntp unicast-server to remove an NTP server specified for the device.
Syntax
sntp unicast-server { server-name | ip-address } [ vpn-instance vpn-instance-name ]
[ authentication-keyid keyid | source interface-type interface-number | version number ] *
undo sntp unicast-server { server-name | ip-address } [ vpn-instance vpn-instance-name ]
Default
No NTP server is specified.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
server-name: Specifies an NTP server by its host name, a case-insensitive string of 1 to 253
characters.
ip-address: Specifies an NTP server by its IP address. 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 instance VPN to which the NTP
server belongs. The vpn-instance-name argument 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. The value range for the keyid argument is 1 to 4294967295. If you do not specify this option,
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. The
default value 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 instance, 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 in the specified VPN instance. If you do not
include the vpn-instance vpn-instance-name option in the command, the command removes the
NTP server on 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
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