3Com Switch 7750 Configuration Guide

Configuration Example 763
Network diagram
Figure 197 Network diagram for the NTP server mode configuration
Configuration procedures
Configure S7750-1.
# Set the local clock as the NTP master clock, with the stratum being 2.
<SW7750-1> system-view
System View: return to User View with Ctrl+Z.
[SW7750-1] ntp-service refclock-master 127.127.1.1 2 ?
The following configurations are for S7750-2.
# View the NTP status of S7750-2 before synchronization.
<SW7750-2> display ntp-service status
Service status: enabled
Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
Nominal frequence: 99.8562 Hz
Actual frequence: 99.8562 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000)
# Configure S7750-1 to be the time server of S7750-2.
<SW7750-2> system-view
[SW7750-2] ntp-service unicast-server 1.0.1.11
# After the above configuration, S7750-2 is synchronized to S7750-1. View the
NTP status of S7750-2.
[SW7750-2] 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)
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S 7750- 1 S 7750- 2