H3C S5600 Series Operation Manual page 988

Operation Manual – NTP
H3C S5600 Series Ethernet Switches
2) Configure Device A (perform the same configuration on Device D).
# Enter system view.
<DeviceA> system-view
# Set Device A as a multicast client to listen to multicast messages through
VLAN-interface 2.
[DeviceA] interface Vlan-interface 2
[DeviceA-Vlan-interface2] ntp-service multicast-client
After the above configurations, Device A and Device D respectively listen to multicast
messages through their own VLAN-interface 2, and Device C advertises multicast
messages through VLAN-interface 2. Because Device A and Device C do not share the
same network segment, Device A cannot receive multicast messages from Device C,
while Device D is synchronized to Device C after receiving multicast messages from
Device C.
View the NTP status of Device D after the clock synchronization.
[DeviceD] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 198.7425 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Apr 2 2007 (BF422AE4.05AEA86C)
The output information indicates that Device D is synchronized to Device C, with a
clock stratum level of 3, one stratum level lower than that Device C.
# View the information about the NTP sessions of Device D (you can see that a
connection is established between Device D and Device C).
[DeviceD] display ntp-service sessions
source
**************************************************************************
[1234]3.0.1.31
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :
reference stra reach poll
127.127.1.0 2
1
1-24
Chapter 1 NTP Configuration
now offset
1 64 377 26.1
delay disper
199.53 9.7