H3C Technologies H3C SR8800 User Manual
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Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
As shown above, Router D has been synchronized to Router C and the clock stratum level of Router
D is 3, while that of Router C is 2.
# View the NTP session information of Router D, which shows that an association has been set up
between Router D and Router C.
[RouterD-GigabitEthernet 3/1/10] 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 31.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
4.
Configure Router B:
Because Router A and Router C are on different subnets, you must enable the multicast functions on
Router B before Router A can receive multicast messages from Router C.
# Enable the IP multicast function.
<RouterB> system-view
[RouterB] multicast routing-enable
[RouterB] interface GigabitEthernet 3/1/1
[RouterB-GigabitEthernet3/1/1] igmp enable
[RouterB-GigabitEthernet3/1/1] igmp static-group 224.0.1.1
[RouterB-GigabitEthernet3/1/1] quit
[RouterB] interface GigabitEthernet 3/1/2
[RouterB-GigabitEthernet3/1/2] pim dm
5.
Configure Router A:
<RouterA> system-view
[RouterA] interface GigabitEthernet 3/1/1
# Configure Router A to work in multicast client mode and receive multicast messages on
GigabitEthernet 3/1/1.
[RouterA-GigabitEthernet3/1/1] ntp-service multicast-client
# View the NTP status of Router A after clock synchronization.
[RouterA-GigabitEthernet3/1/1] 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: 40.00 ms
Root dispersion: 10.83 ms
Peer dispersion: 34.30 ms
Reference time: 16:02:49.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
As shown above, Router A has been synchronized to Router C and the clock stratum level of Router
A is 3, while that of Router C is 2.
# View the NTP session information of Router A, which shows that an association has been set up
between Router A and Router C.