H3C S5500-EI series Operation Manual page 1170

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Operation Manual – NTP

H3C S5500-EI Series Ethernet Switches

[SwitchB] display ntp-service status

Clock status: synchronized

Clock stratum: 3

Reference clock ID: 1.0.1.11

Nominal frequency: 100.0000 Hz

Actual frequency: 100.0000 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 Apr 20 2007 (C6D94F67.5EF9DB22)

As shown above, Switch B has been synchronized to Switch A, and the clock stratum

level of Switch B is 3, while that of Switch A is 2.

# View the NTP session information of Switch B, which shows that an association has

been set up between Switch B and Switch A.

[SwitchB] display ntp-service sessions

**************************************************************************

[12345] 1.0.1.11

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured

Total associations :

1.8.2 Configuring the NTP Symmetric Mode

I. Network requirements

The local clock of Switch A is to be configured as a reference source, with the

stratum level of 2.

Switch B works in the client mode and Switch A is to be used as the NTP server of

Switch C works in the symmetric-active mode and Switch B will act as peer of

Switch C. Switch C is the symmetric-active peer while Switch B is the

symmetric-passive peer.

Chapter 1 NTP Configuration

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