Configuring Ntp Broadcast Mode - H3C S5500-SI Series Operation Manual

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Nominal frequency: 100.0000 Hz

Actual frequency: 100.0000 Hz

Clock precision: 2^18

Clock offset: -21.1982 ms

Root delay: 15.00 ms

Root dispersion: 775.15 ms

Peer dispersion: 34.29 ms

Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)

As shown above, Device C has been synchronized to Device B and the clock stratum level of Device C

# View the NTP session information of Device C, which shows that an association has been set up

between Device B and Device C.

[DeviceC] display ntp-service sessions

********************************************************************************

[12345] 3.0.1.32

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured

Total associations :

Configuring NTP Broadcast Mode

Network requirements

The local clock of Switch C is to be used as the master clock, with a stratum level of 2.

Switch C works in the broadcast server mode and sends out broadcast messages from

VLAN-interface 2.

Switch A and Switch D work in the broadcast client mode. Switch A listens to broadcast messages

through its VLAN-interface 3 and Switch D from its VLAN-interface 2.

Figure 1-9 Network diagram for NTP broadcast mode configuration

Configuration procedure

Configuration on Switch C:

# Configure Switch C to work in the broadcast server mode and send broadcast messages through

VLAN-interface 2.

stra reach poll

delay disper

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