382 CHAPTER 35: NTP CONFIGURATION
Clock stratum: 2
Reference clock ID: 3.0.1.32
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 0.66 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Thu Apr 2 2007 (BF422AE4.05AEA86C)
The output information indicates that the clock of Device C is synchronized to that
of Device B and the stratum level of its local clock is 2, one level lower than Device
B.
# View the information about the NTP sessions of Device C (you can see that a
connection is established between Device C and Device B).
[DeviceC] display ntp-service sessions
source reference stra reach poll now offset delay disper
*************************************************************************
[1234]3.0.1.32 LOCL 1 95 64 42 -14.3 12.9 2.7
[25]3.0.1.31 127.127.1.0 2 1 64 1 4408.6 38.7 0.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 2
Configuring NTP
Broadcast Mode
Network requirements
■ The local clock of Device C is set as the NTP master clock, with a stratum level
of 2. Configure Device C to work in the NTP broadcast server mode and send
NTP broadcast messages through Vlan-interface2.
■ Device A and Device D are two Switch 4210s. Configure Device A and Device D
to work in the NTP broadcast client mode and listen to broadcast messages
through their own Vlan-interface2.
Network diagram
Figure 116 Network diagram for the NTP broadcast mode configuration
Configuration procedure
1 Configure Device C.
# Enter system view.
Vlan-int2
1.0.1.31/24
Vlan-int2
3.0.1.31/24
Vlan-int2
3.0.1.32/24
Device A Device B
Device C
Device D
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