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If you have configured the device to operate in IPv6 multicast client mode on an interface by using
the command, do not add the interface to any aggregate group. To add the interface to an aggregate
group, remove the configuration of the command.
Examples
# Configure the device to operate in IPv6 multicast client mode and receive IPv6 NTP multicast
messages with the destination FF21::1 on GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] ntp-service ipv6 multicast-client ff21::1
Related commands
ntp-service ipv6 multicast-server
ntp-service ipv6 multicast-server
Use ntp-service ipv6 multicast-server to configure the device to operate in IPv6 NTP multicast
server mode and use the current interface to send IPv6 NTP multicast packets.
Use undo ntp-service ipv6 multicast-server to remove the configuration.
Syntax
ntp-service ipv6 multicast-server ipv6-address [authentication-keyid keyid | ttl ttl-number] *
undo ntp-service ipv6 multicast-server ipv6-address
Default
The device does not operate in any NTP association mode.
Views
Interface view
Predefined user roles
network-admin
Parameters
ipv6-address: Specifies an IPv6 multicast address. An IPv6 multicast client and server must be
configured with the same multicast address.
authentication-keyid keyid: Specifies the key ID to be used for sending multicast messages to
multicast clients. The value range for the keyid argument is 1 to 4294967295. If you do not specify
this option, the local device cannot synchronize clients enabled with NTP authentication.
ttl ttl-number: Specifies the TTL of NTP multicast messages. The value range for the ttl-number
argument is 1 to 255, and the default is 16.
Usage guidelines
After you configure the command, the device periodically sends NTP messages to the specified IPv6
multicast address.
If you have configured the device to operate in IPv6 multicast server mode on an interface with the
command, do not add the interface to any aggregate group. To add the interface to an aggregate
group, remove the configuration of the command.
Examples
# Configure the device to operate in IPv6 multicast server mode and send IPv6 NTP multicast
messages on GigabitEthernet 1/0/1 to the multicast address FF21::1, using key 4 for encryption.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1