3Com Switch 4800G 24-Port Configuration Manual page 968

968 C 77: NTP C
HAPTER ONFIGURATION
2 Configuration on Switch B:
<SwitchB> system-view
# Enable NTP authentication on Switch B.
[SwitchB] ntp-service authentication enable
# Set an authentication key.
[SwitchB] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey
# Specify the key as key as a trusted key.
[SwitchB] ntp-service reliable authentication-keyid 42
# Specify Switch A as the NTP server.
[SwitchB] ntp-service unicast-server 1.0.1.11 authentication-keyid 42
Before Switch B can synchronize its clock to that of Switch A, you need to enable
NTP authentication for Switch A.
Perform the following configuration on Switch A:
# Enable NTP authentication.
[SwitchA] ntp-service authentication enable
# Set an authentication key.
[SwitchA] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey
# Specify the key as key as a trusted key.
[SwitchA] ntp-service reliable authentication-keyid 42
# View the NTP status of Switch B after clock synchronization.
[SwitchB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 1.05 ms
Peer dispersion: 7.81 ms
Reference time: 14:53:27.371 UTC Apr 20 2007 (C6D94F67.5EF9DB22)
As shown above, Switch B has been synchronized to Switch A, and the clock
stratum level of Switch B is 3, while that of Switch A is 2.
# View the NTP session information of Switch B, which shows that an association
has been set up Switch B and Switch A.