3Com WX3000 operation manual 9Network diagram for NTP multicast mode configuration

Configuring NTP Multicast Mode

Network requirements

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As shown in Figure 1-9, the local clock of Device C is set as the NTP master clock, with a clock stratum level of 2. Configure Device C to work in the NTP multicast server mode and advertise multicast NTP messages through Vlan-interface2.

Device A and Device D are two WX3000 series devices. Configure Device A and Device D to work in the NTP multicast client mode and listen to multicast messages through their own Vlan-interface2.

Figure 1-9Network diagram for NTP multicast mode configuration

Vlan -int2 1.0.1.31/24

Device A Device B

Vlan -int2 3.0.1.31/24

Device C

Vlan -int2 3.0.1.32/24

Device D

Configuration procedure

1)Configure Device C.

# Enter system view.

<DeviceC> system-view

# Set Device C as a multicast server to send multicast messages through Vlan-interface2.

[DeviceC] interface Vlan-interface 2

[DeviceC-Vlan-interface2] ntp-service multicast-server

2)Configure Device A (perform the same configuration on Device D).

# Enter system view.

<DeviceA> system-view

# Set Device A as a multicast client to listen to multicast messages through Vlan-interface2.

[DeviceA] interface Vlan-interface 2

[DeviceA-Vlan-interface2] ntp-service multicast-client

After the above configurations, Device A and Device D respectively listen to multicast messages through their own Vlan-interface2, and Device C advertises multicast messages through Vlan-interface2. Because Device A and Device C do not share the same network segment, Device A cannot receive multicast messages from Device C, while Device D is synchronized to Device C after receiving multicast messages from Device C.

View the NTP status of Device D after the clock synchronization.

[DeviceD] display ntp-service status

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