R3721-F3210-F3171-HP High-End Firewalls System Management and Maintenance Configuration Guide-6PW101

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[FirewallB] ntp-service unicast-server 3.0.1.31
4. Configure Firewall C (after Firewall B is synchronized to Firewall A):
# Specify the local clock as the reference source, with the stratum level of 1.
<FirewallC> system-view
[FirewallC] ntp-service refclock-master 1
# Configure Firewall B as a symmetric peer after local synchronization.
[FirewallC] ntp-service unicast-peer 3.0.1.32
In the step above, Firewall B and Firewall C are configured as symmetric peers, with Firewall C in
the symmetric-active mode and Firewall B in the symmetric-passive mode. Because the stratus level
of Firewall C is 1 while that of Firewall B is 3, Firewall B is synchronized to Firewall C.
# View the NTP status of Firewall B after clock synchronization.
[FirewallB] 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)
As shown above, Firewall B has been synchronized to Firewall C, and the clock stratum level of
Firewall B is 2, while that of Firewall C is 1.
# View the NTP session information of Firewall B, which shows that an association has been set up
between Firewall B and Firewall C.
[FirewallB] 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
Configuring the NTP broadcast mode
Network requirements
As shown in Figure 52, Firewall C functions as the NTP server for multiple devices on a network segment
and synchronizes the time among multiple devices. Firewall C's local clock is to be used as a reference
source, with the stratum level of 2. Firewall C operates in broadcast server mode and sends out broadcast
messages from GigabitEthernet 0/1. Firewall B and Firewall A operate in the broadcast client mode and
receive broadcast messages through their respective GigabitEthernet 0/1.