H3C Technologies H3C SecBlade LB Cards - Manual (Page 140)

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system-view
[LBA] ntp-service refclock-master 2
• Configure LB B:
# Specify LB A as the NTP server of LB B.
system-view
[LBB] ntp-service unicast-server 3.0.1.31
• Configure LB C (after LB B is synchronized to LB A):
# Specify the local clock as the reference source, with the stratum level 1.
system-view
[LBC] ntp-service refclock-master 1
# Configure LB B as a symmetric peer after local synchronization.
[LBC] ntp-service unicast-peer 3.0.1.32
In the step above, LB B and LB C are configured as symmetric peers, with LB C in the
symmetric-active mode and LB B in the symmetric-passive mode. Because the stratus level of LB C
is 1 while that of LB B is 3, LB B synchronizes to LB C.
# Display the NTP status of LB B after clock synchronization.
[LBB] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.33
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: -21.1982 ms
Root delay: 15.00 ms
Root dispersion: 775.15 ms
Peer dispersion: 34.29 ms
Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)
The output shows that LB B has synchronized to LB C. The stratum level of LB B is 2, and that of LB
C is 1.
# Display NTP session information for LB B, which shows that an association has been set up
between LB B and LB C.
[LBB] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[245] 3.0.1.31 127.127.1.0 2 15 64 24 10535.0 19.6 14.5
[1234] 3.0.1.33 LOCL 1 14 64 27 -77.0 16.0 14.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 2
NTP broadcast mode configuration example
Network requirements
As shown in Figure 86 , LB C functions as the NTP server for multiple devices on a network segment and
synchronizes the time among multiple devices.
• LB C's local clock is to be used as a reference source, with the stratum level 2.