HP VPN Firewall Appliances System Management and Maintenance Configuration Guide

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<FirewallA> system-view
[FirewallA] interface gigabitethernet 0/1
[FirewallA-GigabitEthernet0/1] ntp-service broadcast-client
3. Configure Firewall B:
# Enable NTP authentication on Firewall B. Configure an NTP authentication key, with the key ID
of 88 and key value of 123456. Specify the key as a trusted key.
<FirewallB> system-view
[FirewallB] ntp-service authentication enable
[FirewallB] ntp-service authentication-keyid 88 authentication-mode md5 123456
[FirewallB] ntp-service reliable authentication-keyid 88
# Configure Firewall B to operate in broadcast client mode and receive NTP broadcast messages
on GigabitEthernet 0/1.
[FirewallB] interface gigabitethernet 0/1
[FirewallB-GigabitEthernet0/1] ntp-service broadcast-client
4. Configure Firewall C:
# Specify the local clock as the reference source, with the stratum level 3.
<FirewallC> system-view
[FirewallC] ntp-service refclock-master 3
# Configure Firewall C to operate in NTP broadcast server mode and use GigabitEthernet 0/1 to
send NTP broadcast packets.
[FirewallC] interface gigabitethernet 0/1
[FirewallC-GigabitEthernet0/1] ntp-service broadcast-server
[FirewallC-GigabitEthernet0/1] quit
# Firewall A synchronizes its local clock based on the received broadcast messages sent from
Firewall C.
# Display NTP service status information on Firewall A.
[FirewallA-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 Firewall A has synchronized to Firewall C. The stratum level of Firewall A is
4, and that of Firewall C is 3.
# Display NTP session information for Firewall A, which shows that an association has been set up
between Firewall A and Firewall C.
[FirewallA-GigabitEthernet0/1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[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