H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 36)

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# Take Switch A as an example. Display the NTP status of Switch A after clock synchronization.
[SwitchA-Vlan-interface2] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 8.31 ms
Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2012 (C6D95F6F.B6872B02)
The output shows that Switch A has synchronized to Switch C. The stratum level of Switch A is 3,
and that of Switch C is 2.
# Display NTP session information for Switch A, which shows that an association has been set up
between Switch A and Switch C.
[SwitchA-Vlan-interface2] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1234] 3.0.1.31 127.127.1.0 2 254 64 62 -16.0 32.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
NTP multicast mode configuration example
Network requirements
As shown in Figure 14 , the device functions as the NTP server for multiple devices on different network
segments and synchronizes the time among multiple devices.
• The local clock of the device is to be used as a reference source, with the stratum level 2.
• The device operates in multicast server mode and sends out multicast messages from
VLAN-interface 2.
• Switch A and Switch C operate in multicast client mode and receive multicast messages through
VLAN-interface 3 and VLAN-interface 2, respectively.