3Com MSR 50 Series Configuration Manual page 2072

2072 C 111: NTP C
HAPTER ONFIGURATION
Network diagram
Figure 621 Network diagram for configuration of NTP broadcast mode with
authentication
Eth1/0
1.0.1.11 /24
Router A
Configuration procedure
1 Configuration on Router C:
# Specify the local clock as the reference source, with the stratum level of 3.
<RouterC> system-view
[RouterC] ntp-service refclock-master 3
# Configure NTP authentication
[RouterC] ntp-service authentication enable
[RouterC] ntp-service authentication-keyid 88 authentication-mode md5 123456
[RouterC] ntp-service reliable authentication-keyid 88
# Specify Router C as an NTP broadcast server, and specify an authentication key.
[RouterC] interface ethernet 1/0
[RouterC-Ethernet1/0] ntp-service broadcast-server authentication-keyid 88
2 Configuration on Router D:
# Configure NTP authentication
<RouterD> system-view
[RouterD] ntp-service authentication enable
[RouterD] ntp-service authentication-keyid 88 authentication-mode md5 123456
[RouterD] ntp-service reliable authentication-keyid 88
# Configure Router D to work in the NTP broadcast client mode
[RouterD] interface ethernet 1/0
[RouterD-Ethernet1/0] ntp-service broadcast-client
Now, Router D can receive broadcast messages through Ethernet 1/0, and Router
C can send broadcast messages through Ethernet 1/0. Upon receiving a broadcast
message from Router C, Router D synchronizes its clock to that of Router C.
# View the NTP status of Router D after clock synchronization.
Eth1/1 Eth1/0
1.0.1.10/24 3.0.1.30/24
Router B
Eth1/0
3.0.1.31 /24
Router C
Eth1/0
3.0.1.32 /24
Router D