73
Figure 28 Network diagram for NTP multicast mode configuration
Configuration procedure
1. Set the IP address for each interface as shown in Figure 28. The configuration procedure is omitted.
2. Configuration on Switch C:
# Configure Switch C to work in multicast server mode and send multicast messages through VLAN-
interface 2.
[SwitchC] interface vlan-interface 2
[SwitchC-Vlan-interface2] ntp-service multicast-server
3. Configuration on Switch D:
# Configure Switch D to work in multicast client mode and receive multicast messages on VLAN-interface
2.
<SwitchD> system-view
[SwitchD] interface vlan-interface 2
[SwitchD-Vlan-interface2] ntp-service multicast-client
Because Switch D and Switch C are on the same subnet, Switch D can receive the multicast messages
from Switch C without being enabled with the multicast functions and can be synchronized to Switch C.
# View the NTP status of Switch D after clock synchronization.
[SwitchD-Vlan-interface2] 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
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Switch D has been synchronized to Switch C, and the clock stratum level of Switch
D is 3, while that of Switch C is 2.
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