Configuring Ntp Broadcast Mode - 3Com 4500G Family Configuration Manual

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Reference clock ID: 3.0.1.32

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

segment and synchronizes the time among multiple devices. To realize this requirement, perform the

following configurations:

Switch C's local clock is to be used as a reference source, with the 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 B work in the broadcast client mode. Switch A and Switch B listens to

broadcast messages through its VLAN-interface 2.

Figure 1-9 Network diagram for NTP broadcast mode configuration

1-9, Switch C functions as the NTP server for multiple devices on a network

stra reach poll

delay disper

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