H3C SR6600-X Configuration Manual page 109

Figure 35 Network diagram
Router A
NTP multicast client
Configuration procedure
1. Assign an IP address to each interface, and make sure the routers can reach each other, as shown
in Figure
2. Configure Router C:
# Enable the NTP service.
<RouterC> system-view
[RouterC] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 2.
[RouterC] ntp-service refclock-master 2
# Configure Router C to operate in multicast server mode and send multicast messages through
GigabitEthernet 2/0/1.
[RouterC] interface gigabitethernet 2/0/1
[RouterC-GigabitEthernet2/0/1] ntp-service multicast-server
3. Configure Router D:
# Enable the NTP service.
<RouterD> system-view
[RouterD] ntp-service enable
# Configure Router D to operate in multicast client mode and receive multicast messages on
GigabitEthernet 2/0/1.
[RouterD] interface gigabitethernet 2/0/1
[RouterD-GigabitEthernet2/0/1] ntp-service multicast-client
4. Verify the configuration:
Router D and Router C are on the same subnet, so Router D can do the following:
Receive multicast messages from Router C without being enabled with the multicast function.
Synchronize to Router C.
# Verify that Router D has synchronized to Router C, and the clock stratum level is 3 on Router D
and 2 on Router C.
[RouterD-GigabitEthernet2/0/1] display ntp-service status
Clock status: synchronized
Clock stratum: 3
GE2/0/1 GE2/0/1
1.0.1.11/24 1.0.1.10/24
Router B
35. (Details not shown.)
GE2/0/1
3.0.1.31/24
NTP multicast server
GE2/0/2
3.0.1.30/24
GE2/0/1
3.0.1.32/24
NTP multicast client
95
Router C
Router D