Configuring Ntp Symmetric Peer Mode - 3Com 4200G 12-Port Configuration Manual

Reference clock ID: none
Nominal frequency: 60.0002 Hz
Actual frequency: 60.0002 Hz
Clock precision: 2^18
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000)
# Set Device A as the NTP server of Device B.
<DeviceB> system-view
[DeviceB] ntp-service unicast-server 1.0.1.11
# (After the above configurations, Device B is synchronized to Device A.) View the NTP status of Device
B.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 60.0002 Hz
Actual frequency: 60.0002 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 Apr 2 2007 (BF422AE4.05AEA86C)
The above output information indicates that Device B is synchronized to Device A, and the stratum level
of its clock is 3, one level lower than that of Device A.
# View the information about NTP sessions of Device B. (You can see that Device B establishes a
connection with Device A.)
[DeviceB] display ntp-service sessions
source
**************************************************************************
[12345]1.0.1.11
note: 1 source(master),2
associations :

Configuring NTP Symmetric Peer Mode

Network requirements
The local clock of Device A is set as the NTP master clock, with the clock stratum level of 2.
Device C (an S4200G Ethernet switch) uses Device A as the NTP server, and Device A works in
server mode automatically.
The local clock of Device B is set as the NTP master clock, with the clock stratum level of 1. Set
Device C as the peer of Device B.
reference stra reach poll
127.127.1.0 2
source(peer),3
1
now offset
1 64 1 350.1
selected,4 candidate,5
1-16
delay disper
15.1 0.0
configured Total