HP 5920

45
Reference clock ID: 1.0.1.11
Leap indicator: 00
Clock jitter: 0.005096 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.00655 ms
Root dispersion: 1.15869 ms
Reference time: d0c62687.ab1bba7d Wed, Dec 29 2010 21:28:39.668
The output shows that Device B has been synchronized to Device A, the clock stratum level of
Device B is 3, and that of Device A is 2.
# Display IPv4 NTP association information for Device B.
[DeviceB] display ntp-service sessions
source reference stra reach poll now offset delay disper
********************************************************************************
[1245]1.0.1.11 127.127.1.0 2 1 64 519 -0.0 0.0065 0.0
Notes: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured.
Total sessions : 1
The output shows that an association has been set up between Device B and Device A.
Configuration example for NTP broadcast mode
with authentication
Network requirements
As shown in Figure 17, Switch C functions as the NTP server for multiple devices on different network
segments and synchronizes the time among multiple devices. Switch A and Switch B authenticate the
reference source.
• Configure Switch C's local clock as a reference source, with the stratum level 3.
• Configure Switch C to operate in broadcast server mode and send out broadcast messages from
VLAN-interface 2.
• Switch A and Switch B operate in broadcast client mode and receive broadcast messages through
VLAN-interface 2.
• Enable NTP authentication on Switch A, Switch B, and Switch C.