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ip-address: Specifies a symmetric-passive peer 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 VPN to which the symmetric-passive peer belongs.
The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If the
symmetric-passive peer 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 peer.
The value range for the keyid argument is 1 to 4294967295. If you do not specify this option, the local
device and the peer do not authenticate each other.
priority: Specifies the peer specified by ip-address or peer-name as the first choice under the same
condition.
Source interface-type interface-number: Specifies the source interface for NTP messages. In an
NTP message the local device sends to its peer, the source IP address is the primary IP address of
this interface. The interface-type interface-number argument represents the interface type and
number. If you do not specify this option, the device searches the routing table for the outgoing
interface and uses the primary IP address of the outgoing interface as the source IP address of the
NTP messages.
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 a passive peer for the device, the device and its passive peer can be synchronized
to each other. If their clocks are in synchronized state, the clock with a high stratum level is
synchronized to the clock with a lower stratum level.
To synchronize the PE to a PE or CE in a VPN, provide vpn-instance vpn-instance-name in your
command.
If you include vpn-instance vpn-instance-name in the undo ntp-service unicast-peer command,
the command removes the symmetric-passive peer with the IP address of ip-address in the specified
VPN. If you do not include vpn-instance vpn-instance-name in the command, the command
removes the symmetric-passive peer with the IP address of ip-address in the public network.
Examples
# Specify the device with the IP address of 10.1.1.1 as the symmetric-passive peer of the local
device, and configure the local device to run NTP version 4. Specify the source interface of NTP
messages as GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] ntp-service unicast-peer 10.1.1.1 version 4 source gigabitethernet 1/0/1
Related commands
ntp-service authentication enable
ntp-service authentication-keyid
ntp-service reliable authentication-keyid
ntp-service unicast-server
Use ntp-service unicast-server to specify an NTP server for the device.
Use undo ntp-service unicast-server to remove an NTP server specified for the device.
Syntax
ntp-service unicast-server { server-name | ip-address } [ vpn-instance vpn-instance-name ]
[ authentication-keyid keyid | priority | source interface-type interface-number | version number ]
*
undo ntp-service unicast-server { server-name | ip-address } [ vpn-instance vpn-instance-name ]
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