3Com 4200G 12-Port Configuration Manual page 318

304 C 35: NTP C
HAPTER ONFIGURATION
Configuration procedures
1 Configure S4200G 3.
a Enter system view.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[S4200G]
b Enter VLAN interface 2 view.
[S4200G] interface vlan-interface 2
[S4200G-Vlan-interface2]
c Configure S4200G 3 to be the broadcast server and send broadcast packets
through VLAN interface 2.
[S4200G-Vlan-interface2] ntp-service broadcast-server
2 Configure S4200G 1.
a Enter system view.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[S4200G]
b Enter VLAN interface 2 view.
[S4200G] interface vlan-interface 2
[S4200G-Vlan-interface2]
c Configure S4200G 1 to be a broadcast client.
[S3100S4200G-Vlan-interface2] ntp-service broadcast-client
3 Configure S4200G 2
a Enter system view.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[S4200G]
b Enter VLAN interface 2 view.
[S4200G] interface vlan-interface 2
[S4200G-Vlan-Interface2]
c Configure S4200G 2 to be a broadcast client.
[S4200G-Vlan-interface2] ntp-service broadcast-client
The above configuration configures S4200G 1 to listen to broadcast packets through
their VLAN interface 2, and S4200G 3 to send broadcast packets through VLAN
interface 2. Because S4200G 2 does reside in the same network segment as S4200G
3 resides, the former cannot receive broadcast packets sent by S4200G 3, while
S4200G 1 is synchronized to S4200G 3 after receiving broadcast packets sent by
S4200G 3.
Display the status of S4200G 1 after the synchronization.
[S4200G] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 250.0000 Hz
Actual frequency: 249.9992 Hz
Clock precision: 2^19
Clock offset: 198.7425 ms