H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 32)

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Reference clock ID: none
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^16
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)
# Specify the device as the NTP server of the AP so that the AP is synchronized to the device.
system-view
[AP] ntp-service unicast-server 1.0.1.11
# Display the NTP status of the AP after clock synchronization.
[AP] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^16
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 1.05 ms
Peer dispersion: 7.81 ms
Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)
The output shows that the AP has been synchronized to the device, and the clock stratum level of the AP
is 3, while that of the device is 2.
# Display NTP session information for the AP, which shows that an association has been set up between
the AP and the device.
[AP] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[12345] 1.0.1.11 127.127.1.0 2 63 64 3 -75.5 31.0 16.5
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
Configuring NTP broadcast mode
Network requirements
As shown in Figure 12 , Switch B functions as the NTP server for multiple devices on a network segment
and synchronizes the time among multiple devices. More specifically:
• Switch B's local clock is to be used as a reference source, with the stratum level 2.
• Switch B operates in broadcast server mode and sends out broadcast messages from
VLAN-interface 2.
• AP 1 and AP 2 operate in broadcast client mode, and listen to broadcast messages through
VLAN-interface 3 and VLAN-interface 2 respectively.