3Com 3C13636 Configuration Manual page 171

3Com Router 3000 Ethernet Family
Configuration Guide
# Set NTP authentication key.
[3Com3] ntp-service authentication-keyid 88 authentication-mode md5 123456
# Set the local authentication key as reliable.
[3Com3] ntp-service reliable authentication-keyid 88
# Enter the interface Ethernet1/0/0 view.
[3Com3] interface ethernet 1/0/0
# Set the local router as NTP broadcast server and specify authentication ID.
[3Com3-Ethernet1/0/0] ntp-service broadcast-server authentication-id 88
2) Configure 3Com4
# Enter the system view.
<3Com4> system-view
# Enable the authentication function.
[3Com4] ntp-service authentication enable
# Set NTP authentication key.
[3Com4] ntp-service authentication-keyid 88 authentication-mode md5 123456
# Set the local authentication key as reliable.
[3Com4] ntp-service reliable authentication-keyid 88
# Enter the interface Ethernet1/0/0 view.
[3Com4] interface ethernet 1/0/0
# Set the local router as NTP broadcast Client.
[3Com4-Ethernet1/0/0] ntp-service broadcast-client
In the above configuration, 3Com4 is configured to listen to broadcast messages from
Ethernet1/0/0 and 3Com3 is configured to transmit broadcast packets from
Ethernet1/0/0. 3Com4 is synchronized with 3Com3 after receiving the broadcast
packets transmitted by 3Com3.
The state of 3Com4 after synchronization includes:
<3Com4> display ntp-service status
clock status: synchronized
clock stratum: 4
reference clock ID: 3.0.1.31
nominal frequency: 250.0000 Hz
actual frequency: 249.9992 Hz
clock precision: 2^19
clock offset: 198.7425 ms
root delay : 27.47 ms
root disper: 208.39 ms
peer disper: 9.63 ms
3Com Corporation
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Chapter 8 NTP Configuration