H3C S7500 Series Operation Manual page 817

Operation Manual – NTP
H3C S7500 Series Ethernet Switches
III. Configuration procedures
1) Configure H3C3.
# Enter system view.
<H3C3> system-view
[H3C3]
# Enter VLAN-interface 2 view.
[H3C3] interface Vlan-interface 2
# Configure H3C3 to be a multicast server.
[H3C3-Vlan-Interface2] ntp-service multicast-server
2) Configure S7500-1.
# Enter system view.
<S7500-1> system-view
[S7500-1]
# Enter VLAN-interface 2 view.
[S7500-1] interface vlan-interface 2
# Configure S7500-1 to be a multicast client.
[S7500-1-Vlan-interface2] ntp-service multicast-client
3) Configure S7500-2.
# Enter system view.
<S7500-2> system-view
[S7500-2]
# Enter VLAN-interface 2 view.
[S7500-2] interface Vlan-interface 2
# Configure S7500-2 to be a multicast client.
[S7500-2-Vlan-Interface2] ntp-service multicast-client
The above configuration configures S7500-1 and S7500-2 to listen to multicast packets
through their VLAN interface 2, and H3C3 to advertise multicast packets through VLAN
interface 2. Because S7500-2 does not reside in the same network segment with H3C3,
S7500-2 cannot receive multicast packets sent by H3C3, while S7500-1 is
synchronized to H3C3 after receiving multicast packets sent by H3C3.
View the status of S7500-1 after the synchronization.
[S7500-1] display ntp-service status
Service status: enabled
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 250.0000 Hz
1-19
Chapter 1 NTP Configuration