Ntp multicast mode configuration example, Network requirements – H3C Technologies H3C SecPath F1000-E User Manual
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# Configure SecPath A to operate in broadcast client mode and receive broadcast messages on
GigabitEthernet 0/1.
<SecPathA> system-view
[SecPathA] interface GigabitEthernet 0/1
[SecPathA-GigabitEthernet0/1] ntp-service broadcast-client
4.
Configure SecPath B:
# Configure SecPath B to operate in broadcast client mode and receive broadcast messages on
GigabitEthernet 0/1.
<SecPathB> system-view
[SecPathB] interface GigabitEthernet 0/1
[SecPathB-GigabitEthernet0/1] ntp-service broadcast-client
SecPath A and SecPath B get synchronized upon receiving a broadcast message from
SecPath C.
# Take SecPath A as an example. View the NTP status of SecPath A after clock synchronization.
[SecPathA-GigabitEthernet0/1] 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 2005 (C6D95F6F.B6872B02)
As shown above, SecPath A has been synchronized to SecPath C and the clock stratum level of
SecPath A is 3, while that of SecPath C is 2.
# View the NTP session information of SecPath A, which shows that an association has been set up
between SecPath A and SecPath C.
[SecPathA-GigabitEthernet0/1] 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
, SecPath C functions as the NTP server for multiple devices on different network
segments and synchronizes the time among multiple devices. SecPath C’s local clock is to be used as a
reference source, with the stratum level of 2. SecPath C operates in multicast server mode and sends out
multicast messages from GigabitEthernet 0/1. SecPath D and SecPath A operate in multicast client mode
and receive multicast messages through their respective GigabitEthernet 0/1.