3Com 10014298 manual Example Configuring NTP Broadcast Mode, Enter Vlan-interface2 view

290CHAPTER 11: SYSTEM MANAGEMENT

Example: Configuring NTP Broadcast Mode

On SW77503, set local clock as the NTP master clock at stratum 2, and configure to broadcast packets from Vlan-interface2. Configure SW77504 and SW77501 to listen to the broadcast from their Vlan-interface2. See Figure 66.

Configure Ethernet Switch SW77503:

1Enter system view.

<SW77503>system-view

2Set the local clock as the NTP master clock at stratum 2.

[SW77503]ntp-service refclock-master 2

3Enter Vlan-interface2 view.

[SW77503]interface vlan-interface 2

4Set it as broadcast server.

[SW77503-Vlan-Interface2]ntp-service broadcast-server

Configure Ethernet Switch SW77504:

1Enter system view.

<SW77504>system-view

2Enter Vlan-interface2 view.

[SW77504]interface vlan-interface 2 [SW77504-Vlan-Interface2]ntp-service broadcast-client

Configure Ethernet Switch SW77501:

1Enter system view.

<SW77501>system-view

2Enter Vlan-interface2 view.

[SW77501]interface vlan-interface 2 [SW77501-Vlan-Interface2]ntp-service broadcast-client

The above examples configured SW77504 and SW77501 to listen to the broadcast through Vlan-interface2, SW77503 to broadcast packets from Vlan-interface2. Since SW77501 and SW77503 are not located on the same segment, they cannot receive any broadcast packets from SW77503, while SW77504 is synchronized by SW77503 after receiving its broadcast packet.

After the synchronization, you can find the state of SW77504 as follows:

[SW77504]display ntp-service status

clock status: synchronized

clock stratum: 8

reference clock ID: LOCAL(0)

nominal frequency: 100.0000 Hz

actual frequency: 100.0000 Hz

clock precision: 2^17