3Com Switch 8800 Advanced Software V5 Configuration Guide

1084 CHAPTER 85: NTP CONFIGURATION
<DeviceB> system-view
# Enable NTP authentication on Device B.
[DeviceB] ntp-service authentication enable
[DeviceB] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey
[DeviceB] ntp-service reliable authentication-keyid 42
[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:
# Enable NTP authentication.
[DeviceA] ntp-service authentication enable
# Set an authentication key.
[DeviceA] ntp-service authentication-keyid 42 authentication-mode md
5
aNiceKey
# Specify the key as key as a trusted key.
[DeviceA] ntp-service reliable authentication-keyid 42
After the above configurations, Device B can be synchronized to Device A.
# View 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
Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)
As shown above, Device B has been synchronized to Device A, and the clock
stratum level of Device B is 3, while that of Device A is 2.
# View the NTP session information of Device B, which shows that an association
has been set up Device B and Device A.
[DeviceB] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[12345] 1.0.1.11 127.127.1.0 2 63 64 3 -75.5 31.0 16.5
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1