104
Figure 41
Network diagram
Configuration procedure
1.
Assign an IP address to each interface, and make sure the switches can reach each other, as
shown in
. (Details not shown.)
2.
Configure Switch C:
# Enable the NTP service.
<SwitchC> system-view
[SwitchC] ntp-service enable
# Specify the local clock as the reference source, with stratum level 2.
[SwitchC] ntp-service refclock-master 2
# Configure Switch C to operate 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.
Configure Switch D:
# Enable the NTP service.
<SwitchD> system-view
[SwitchD] ntp-service enable
# Configure Switch D to operate in multicast client mode and receive multicast messages on
VLAN-interface 2.
[SwitchD] interface vlan-interface 2
[SwitchD-Vlan-interface2] ntp-service multicast-client
4.
Verify the configuration:
Switch D and Switch C are on the same subnet, so Switch D can do the following:
Receive the multicast messages from Switch C without being enabled with the multicast
functions.
Synchronize to Switch C.
# Verify that Switch D has synchronized to Switch C, and the clock stratum level is 3 on Switch
D and 2 on Switch C.
[SwitchD-Vlan-interface2] display ntp-service status
Clock status: synchronized
Clock stratum: 3
System peer: 3.0.1.31
Vlan-int3
1.0.1.11/24
Vlan-int3
1.0.1.10/24
Vlan-int2
3.0.1.31/24
Vlan-int2
3.0.1.32/24
Vlan-int2
3.0.1.30/24
Switch A
NTP multicast client
Switch B
Switch C
NTP multicast server
Switch D
NTP multicast client