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If you include the vpn-instance vpn-instance-name option in the undo ntp-service ipv6 unicast-peer
command, the command removes the symmetric-passive peer with the IPv6 address of ipv6-address in
the specified VPN. If you do not include the vpn-instance vpn-instance-name option in the command, the
command removes the symmetric-passive peer with the IPv6 address of ipv6-address in the public
network.
Examples
# Specify the device with the IPv6 address of 2001::1 as the symmetric-passive peer of the local device,
and specify the source interface for IPv6 NTP messages as GigabitEthernet 2/0/1.
<Sysname> system-view
[Sysname] ntp-service ipv6 unicast-peer 2001::1 source gigabitethernet 2/0/1
Related commands
• ntp-service authentication enable
• ntp-service authentication-keyid
• ntp-service reliable authentication-keyid
ntp-service ipv6 unicast-server
Use ntp-service ipv6 unicast-server to specify an IPv6 NTP server for the device.
Use undo ntp-service ipv6 unicast-server to remove an IPv6 NTP server specified for the device.
Syntax
ntp-service ipv6 unicast-server { server-name | ipv6-address } [ vpn-instance vpn-instance-name ]
[ authentication-keyid keyid | priority | source interface-type interface-number ] *
undo ntp-service ipv6 unicast-server { server-name | ipv6-address } [ vpn-instance vpn-instance-name ]
Default
No IPv6 NTP server is specified for the device.
Views
System view
Predefined user roles
network-admin
Parameters
server-name: Specifies the host name of the NTP server, a case-insensitive string of 1 to 253 characters.
ipv6-address: Specifies the IPv6 address of the NTP server. It must be a unicast address, rather than a
multicast address.
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 this option is not specified, the local device and NTP
server do not authenticate each other.
priority: Specifies this NTP server as the first choice under the same condition.
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