H3C Technologies H3C SecBlade LB Cards - Manual (Page 144)

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[Device] multicast routing-enable
[Device] interface gigabitethernet 0/1
[Device-GigabitEthernet0/1] igmp enable
[Device-GigabitEthernet0/1] igmp static-group 224.0.1.1
[Device-GigabitEthernet0/1] quit
[Device] interface gigabitethernet 0/2
[Device-GigabitEthernet0/2] pim dm
• Configure LB A:
system-view
[LBA] interface gigabitethernet 0/1
# Configure LB A to operate in multicast client mode and receive multicast messages on
GigabitEthernet 0/1.
[LBA-GigabitEthernet0/1] ntp-service multicast-client
# Display the NTP status of LB A after clock synchronization.
[LBA-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: 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)
The output shows that LB A has synchronized to LB B. The stratum level of LB A is 3, and that of LB
B is 2.
# Display NTP session information for LB A, which shows that an association has been set up
between LB A and LB B.
[LBA-Ethernet0/1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1234] 3.0.1.31 127.127.1.0 2 255 64 26 -16.0 40.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
Configuration example for NTP client/server mode with
authentication
In this example, Device B is the LB product.
Network requirements
As shown in Figure 88 , perform the following configurations to synchronize the time between Device B
and Device A and ensure network security.
• The local clock of Device A is to be configured as a reference source, with the stratum level 2.