H3C Technologies H3C SecBlade LB Cards - Manual (Page 145)

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• Device B operates in client mode and Device A is to be used as the NTP server of Device B, with
Device B as the client.
• NTP authentication is to be enabled on both Device A and Device B.
Figure 88 Network diagram
Configuration procedure
• Set the IP address for each interface as shown in Figure 88 . (Details not shown.)
• Configure Device A:
# Specify the local clock as the reference source, with the stratum level 2.
system-view
[DeviceA] ntp-service refclock-master 2
• Configure Device B:
system-view
# Enable NTP authentication on Device B.
[DeviceB] ntp-service authentication enable
# Set an authentication key.
[DeviceB] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey
# Specify the key as a trusted key.
[DeviceB] ntp-service reliable authentication-keyid 42
# Specify Device A as the NTP server of Device B.
[DeviceB] ntp-service unicast-server 1.0.1.11 authentication-keyid 42
Before Device B can synchronize to Device A, enable NTP authentication for Device A.
• Perform the following configuration on Device A:
# Enable NTP authentication.
[DeviceA] ntp-service authentication enable
# Set an authentication key.
[DeviceA] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey
# Specify the key as a trusted key.
[DeviceA] ntp-service reliable authentication-keyid 42
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 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