3Com Switch 7750 Configuration Guide Guide

706 CHAPTER 66: NTP CONFIGURATION

[Switch 7750 Family-2] display ntp-service status

Service status: enabled

Clock status: synchronized

Clock stratum: 3

Reference clock ID: 1.0.1.11

Nominal frequence: 250.0000 Hz

Actual frequence: 249.9992 Hz

Clock precision: 2^19

Clock offset: 0.66 ms

Root delay: 27.47 ms

Root dispersion: 208.39 ms

Peer dispersion: 9.63 ms

Reference time: 17:03:32.022 UTC Thu Sep 6 2001 (BF422AE4.05AEA86C)

The above output information indicates that Switch 7750 Family-2 is synchronized

to Switch 7750 Family-1, and the stratum of its clock is 3, one stratum higher than

Switch 7750 Family-1.

# View the information about the NTP sessions of Switch 7750 Family-2. You can

see that Switch 7750 Family-2 establishes a connection with Switch 7750

Family-1.

[Switch 7750 Family-2]dis ntp-service sessions

source reference stra reach poll now offset delay disper

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

[12345]1.0.1.11 127.127.1.1 2 1 64 1 350.1 15.1 0.0

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

NTP Peer Mode

Configuration

Network requirements

3Com2 sets the local clock to be the NTP master clock, with the clock stratum

being 2.

Configure Switch 7750 to operate as a client, with Switch 7750 2 as the time

server. Switch 7750 2 will then operate in the server mode automatically.

Meanwhile, Switch 7750 3 sets Switch 7750 to be its peer.

This example assumes that:

■ Switch 7750 2 is a switch that allows its local clock to be the master clock.

■ Switch 7750 3 is a switch that allows its local clock to be the master clock and

the stratum of its clock is 1.