F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices System Management and Maintenance Configuration Guide-6PW100

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251BConfiguring NTP broadcast mode
428BNetwork requirements
As shown in 843HFigure 54, 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 2.
• Firewall C operates in broadcast server mode and sends broadcast messages from GigabitEthernet
0/1.
• Firewall B and Firewall A operate in broadcast client mode and receive broadcast messages
through their respective GigabitEthernet 0/1.
Figure 54 Network diagram
429BConfiguration procedure
1. Set the IP address for each interface as shown in 844HFigure 54. (Details not shown.)
2. Configure Firewall C:
# Specify the local clock as the reference source, with the stratum level 2.
<FirewallC> system-view
[FirewallC] ntp-service refclock-master 2
# Configure Firewall C to operate in broadcast server mode and send broadcast messages
through GigabitEthernet 0/1.
[FirewallC] interface gigabitethernet 0/1
[FirewallC-GigabitEthernet0/1] ntp-service broadcast-server
3. Configure Firewall A:
# Configure Firewall A to operate in broadcast client mode and receive broadcast messages on
GigabitEthernet 0/1.
<FirewallA> system-view
[FirewallA] interface gigabitethernet 0/1
[FirewallA-GigabitEthernet0/1] ntp-service broadcast-client
4. Configure Firewall B:
# Configure Firewall B to operate in broadcast client mode and receive broadcast messages on
GigabitEthernet 0/1.
GE0/1
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GE0/1
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Firewall A
NTP broadcast client
Firewall C
NTP broadcast server
Firewall B
NTP broadcast client
GE0/1
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