H3C S5500-EI series Operation Manual page 1173

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Operation Manual – NTP

H3C S5500-EI Series Ethernet Switches

II. Network diagram

Figure 1-9 Network diagram for NTP broadcast mode configuration

III. Configuration procedure

Configuration on Switch C:

# Specify the local clock as the reference source, with the stratum level of 2.

<SwitchC> system-view

[SwitchC] ntp-service refclock-master 2

# Configure Switch C to work in the broadcast server mode and send broadcast

messages through VLAN-interface 2.

[SwitchC] interface vlan-interface 2

[SwitchC-Vlan-interface2] ntp-service broadcast-server

Configuration on Switch D:

# Configure Switch D to work in the broadcast client mode and receive broadcast

messages on VLAN-interface 2.

<SwitchD> system-view

[SwitchD] interface vlan-interface 2

[SwitchD-Vlan-interface2] ntp-service broadcast-client

Configuration on Switch A:

# Configure Switch A to work in the broadcast client mode and receive broadcast

messages on VLAN-interface 3.

<SwitchA> system-view

[SwitchA] interface vlan-interface 3

[SwitchA-Vlan-interface3] ntp-service broadcast-client

Because Switch A and Switch C are on different subnets, Switch A cannot receive the

broadcast messages from Switch C Switch D gets synchronized upon receiving a

broadcast message from Switch C.

Chapter 1 NTP Configuration

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