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Network requirements – H3C Technologies H3C S6300 Series Switches User Manual

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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 16

, 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.