H3C Technologies H3C SR8800 - Manual (Page 88)

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[RouterA-GigabitEthernet3/1/1] display ntp-service sessions
source reference stra reach poll now offset delay disper
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[1234] 3.0.1.31 127.127.1.0 2 255 64 26 -16.0 40.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
NOTE:
For more information about how to configuration IGMP and PIM, see IP Multicast Configuration Guide.
Configuring NTP client/server mode with authentication
Network requirements
As shown in Figure 29 , perform the following configurations to synchronize the time between Device B
and Device A and ensure network security. More specifically:
• The local clock of Device A is to be configured as a reference source, with the stratum level of 2.
• Device B works in the 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 for Device A and Device B at the same time.
Figure 29 Network diagram
Configuration procedure
1. Set the IP address for each interface as shown in Figure 29 . (Details not shown)
2. Configure Device A
# Specify the local clock as the reference source, with the stratum level of 2.
system-view
[DeviceA] ntp-service refclock-master 2
3. 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 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 its clock to that of Device A, you need to enable NTP
authentication for Device A.
Perform the following configuration on Device A: