R21xx-HP FlexFabric 11900 Network Management and Monitoring Command Reference

Usage guidelines

After you configure this command, the device listens to NTP messages with the destination address as the

specified multicast address.

If you have configured the device to operate in multicast client mode on an interface with this 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 multicast client mode and receive NTP multicast messages on

VLAN-interface 1, and set the multicast address to 224.0.1.1.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] ntp-service multicast-client 224.0.1.1

Related commands

ntp-service multicast-server

Use ntp-service multicast-server to configure the device to operate in NTP multicast server mode and use

the current interface to send NTP multicast packets.

Use undo ntp-service multicast-server to remove the configuration.

Syntax

ntp-service multicast-server [ ip-address ] [ authentication-keyid keyid | ttl ttl-number | version number ]

undo ntp-service multicast-server [ ip-address ]

Default

The device does not operate in any NTP association mode.

View

VLAN interface view, Layer 3 Ethernet interface view

Predefined user roles

network-admin

Parameters

ip-address: Specifies a multicast IP address, and the default is 224.0.1.1. A multicast server and client

must be configured with the same multicast IP address.

authentication-keyid keyid: Specifies the key ID to be used for sending multicast messages to multicast

clients, where keyid is in the range of 1 to 4294967295. If this option is not specified, the local device

cannot synchronize multicast clients enabled with NTP authentication.

ttl ttl-number: Specifies the TTL of NTP multicast messages, where ttl-number is in the range of 1 to 255.

The default value is 16.

version number: Specifies the NTP version, where number is in the range of 1 to 4. The default value is