H3C Technologies H3C SecBlade LB Cards User Manual
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[LBA-GigabitEthernet0/1] ntp-service broadcast-client
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Configure LB B:
# Enable NTP authentication on LB B. Configure an NTP authentication key, with the key ID of 88
and key value of 123456. Specify the key as a trusted key.
[LBB] ntp-service authentication enable
[LBB] ntp-service authentication-keyid 88 authentication-mode md5 123456
[LBB] ntp-service reliable authentication-keyid 88
# Configure LB B to operate in broadcast client mode and receive NTP broadcast messages on
GigabitEthernet 0/1.
[LBB] interface gigabitethernet 0/1
[LBB-GigabitEthernet0/1] ntp-service broadcast-client
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Configure LB C:
# Specify the local clock as the reference source, with the stratum level 3.
[LBC] ntp-service refclock-master 3
# Configure LB C to operate in NTP broadcast server mode and use GigabitEthernet 0/1 to send
NTP broadcast packets.
[LBC] interface gigabitethernet 0/1
[LBC-GigabitEthernet0/1] ntp-service broadcast-server
[LBC-GigabitEthernet0/1] quit
# LB A synchronizes its local clock based on the received broadcast messages sent from LB C.
# Display NTP service status information on LB A.
[LBA-GigabitEthernet0/1] display ntp-service status
Clock status: synchronized
Clock stratum: 4
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)
The output shows that LB A has synchronized to LB C. The stratum level of LB A is 4, and that of LB
C is 3.
# Display NTP session information for LB A, which shows that an association has been set up
between LB A and LB C.
[LBA-GigabitEthernet0/1] display ntp-service sessions
source reference
stra reach poll now offset delay disper
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[1234] 3.0.1.31 127.127.1.0 3 254 64 62 -16.0 32.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1