Configuring Ntp Broadcast Mode - HP 4800G Series Configuration Manual

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[SwitchB] display ntp-service status

Clock status: synchronized

Clock stratum: 2

Reference clock ID: 3.0.1.33

Nominal frequency: 64.0000 Hz

Actual frequency: 64.0000 Hz

Clock precision: 2^7

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, Switch B has been synchronized to Switch C, and the clock stratum level of Switch B

is 2, while that of Switch C is 1.

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

between Switch B and Switch C.

[SwitchB] display ntp-service sessions

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

[245] 3.0.1.31

[1234] 3.0.1.33

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

offset delay

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