H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 91)

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# View the NTP status of AC after clock synchronization.
[AC] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
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: 1.05 ms
Peer dispersion: 7.81 ms
Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)
As shown above, AC has been synchronized to Switch, and the clock stratum level of AC is 3, while that
of Switch is 2.
# View the NTP session information of AC, which shows that an association has been set up AC and
Switch.
[AC] 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 with Authentication
Network requirements
z The local clock of AC 2 is to be used as a reference source, with the stratum level of 3.
z AC 2 works in the broadcast server mode and sends out broadcast messages from VLAN-interface
2.
z AC 3 works in the broadcast client mode and receives broadcast messages through
VLAN-interface 2.
z NTP authentication is enabled on both AC 2 and AC 3.
Figure 6-12 Network diagram for configuration of NTP broadcast mode with authentication
Vlan-int3
1.0.1.11/24 Vlan-int3
1.0.1.10/24
Vlan-int2
3.0.1.31/24
Vlan-int2
3.0.1.32/24
Vlan-int2
3.0.1.30/24
AC 1 Switch
AC 2
AC 3