Operation Manual – NTP
H3C S3100 Series Ethernet Switches Chapter 1 NTP Configuration
1-24
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 reference stra reach poll now offset delay disper
**************************************************************************
[1234]3.0.1.31 127.127.1.0 2 1 64 377 26.1 199.53 9.7
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
1.8.5 Configuring NTP Server/Client Mode with Authentication
I. Network requirements
z The local clock of Device A is set as the NTP master clock, with a clock stratum
level of 2.
z Device B is an S3100 Ethernet switch and uses Device A as the NTP server.
Device B is set to work in client mode, while Device A works in server mode
automatically.
z The NTP authentication function is enabled on Device A and Device B.
II. Network diagram
1.0.1.11/24 1.0.1.12/24
Device A Device B
Figure 1-10 Network diagram for NTP server/client mode with authentication
configuration
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