H3c-technologies H3C WX5500E Series Access Controllers Instrukcja Użytkownika Pobierz pdf (Strona 36)

# Take Switch A as an example. Display the NTP status of Switch A after clock synchronization.

[SwitchA-Vlan-interface2] display ntp-service status

Clock status: synchronized

Clock stratum: 3

Reference clock ID: 3.0.1.31

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: 8.31 ms

Peer dispersion: 34.30 ms

Reference time: 16:01:51.713 UTC Sep 19 2012 (C6D95F6F.B6872B02)

The output shows that Switch A has synchronized to Switch C. The stratum level of Switch A is 3,

and that of Switch C is 2.

# Display NTP session information for Switch A, which shows that an association has been set up

between Switch A and Switch C.

[SwitchA-Vlan-interface2] display ntp-service sessions

source reference stra reach poll now offset delay disper

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

[1234] 3.0.1.31 127.127.1.0 2 254 64 62 -16.0 32.0 16.6

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

Total associations : 1

NTP multicast mode configuration example

Network requirements

As shown in Figure 14, the device functions as the NTP server for multiple devices on different network

segments and synchronizes the time among multiple devices.

• The local clock of the device is to be used as a reference source, with the stratum level 2.

• The device operates in multicast server mode and sends out multicast messages from

VLAN-interface 2.

• Switch A and Switch C operate in multicast client mode and receive multicast messages through

VLAN-interface 3 and VLAN-interface 2, respectively.

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H3c-technologies H3C WX5500E Series Access Controllers Instrukcja Użytkownika Strona 36