H3C Technologies H3C SecPath F1000-E - Manual (Page 133)

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Figure 10 Network diagram for NTP multicast mode configuration
GE0/1
1.0.1.10/24
Device A
GE0/1
3.0.1.31/24
GE0/1
3.0.1.32/24
Device B
Device C
Device D
GE0/1
1.0.1.11/24 GE0/2
3.0.1.30/24
Configuration procedure
Step1 Set the IP address for each interface as shown in Figure 10 . The configuration procedure is omitted.
Step2 Configuration on Device C:
# Specify the local clock as the reference source, with the stratum level of 2.
system-view
[DeviceC] ntp-service refclock-master 2
# Configure Device C to work in multicast server mode and send multicast messages through
GigabitEthernet 0/1.
[DeviceC] interface gigabitEthernet0/1
[DeviceC-GigabitEthernet0/1] ntp-service multicast-server
Step3 8Configuration on Device D:
# Configure Device D to work in multicast client mode and receive multicast messages on
GigabitEthernet 0/1.
system-view
[DeviceD] interface gigabitEthernet0/1
[DeviceD-GigabitEthernet0/1] ntp-service multicast-client
Because Device D and Device C are on the same subnet, Device D can receive the multicast messages
from Device C without being enabled with the multicast functions and can be synchronized to Device C.
# View the NTP status of Device D after clock synchronization.
[DeviceD-GigabitEthernet0/1] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 8.31 ms
Peer dispersion: 34.30 ms