3Com 7757 Configuration Manual page 770

770 C 70: NTP C
HAPTER ONFIGURATION
Network diagram
Figure 201 Network diagram for NTP server mode with authentication configuration
1.0.1.11/24 1 .0.1.12/24
S7500-1 S7500-2
Configuration procedures
1 Configure Switch 7750-2.
# Enter system view.
<SW7750-2 > system-view
[SW7750-2]
# Configure Switch 7750-1 to be the time server.
[SW7750-2] ntp-service unicast-server 1.0.1.11
# Enable NTP authentication.
[SW7750-2] ntp-service authentication enable
# Set the MD5 key to 42, with the content being aNiceKey.
[SW7750-2] ntp-service authentication-keyid 42 authentication-mode m
d5 aNiceKey
# Specify the key to be a trusted key.
[SW7750-2] ntp-service reliable authentication-keyid 42
[[SW7750-2] ntp-service unicast-server 1.0.1.11 authentication-keyid 42
The above configuration synchronizes Switch 7750-2 to Switch 7750-1. As NTP
authentication is not enabled on Switch 7750-1, Switch 7750-2 will fail to be
synchronized to Switch 7750-1.
The following configuration is needed for Switch 7750-1.
# Enable authentication on 3Com1.
[SW7750-1] system-view
[SW7750-1] ntp-service authentication enable
# Set the MD5 key to 42, with the content being aNiceKey.
[SW7750-1] ntp-service authentication-keyid 42 authentication-model
md5 aNiceKey
# Specify the key to be a trusted key.
[SW7750-1] ntp-service reliable authentication-keyid 42
After the above configuration, Switch 7750-2 can be synchronized to Switch
7750-1. You can view the status of Switch 7750-2 after the synchronization.